Black Star Research Articles

Evaluation of commercial and taste qualities of plum fruits in the foothills of Kabardino-Balkaria

Breeding varieties with high commercial and consumer qualities of fruits is one of the priority areas in the selection and variety study of domestic plum. Accordingly, the evaluation of some commercial and consumer qualities of fruits in plum varieties in the specific conditions of the mountains and foothills of the region is of great practical and scientific interest. Taking into account market requirements and the growth of consumer demand for fruit products, it is necessary to constantly update the range of plums. In this regard, varieties and hybrid forms of European plum for the subsequent selection of variety samples with high commercial characteristics have been studied (fruit weight, their uniformity and shape, cover color, aroma, pulp juiciness, taste, etc.). As a result of the studies, variety samples with the best commercial and taste properties of fruits have been selected. The following varieties have been distinguished by a high sugar content: Čačakska rannyaya - 18.8%, Grosso de Felicio - 16.5%, Big Heart - 14.7%, Milena - 13.8%, Velikiy Gertsog - 12.7%. The following varieties have been noted for the content of organic acids: Big Heart - 1.31%, Velikiy Gertsog - 1.1%, Milena - 0.92%, Čačakska rannyaya - 0.9%, Grossa de Felicio - 0.89%. Vitamin C is found in the highest amounts in the fruits of the following varieties: Big Heart – 7.85%, Grossa de Felicio – 6.34%, Angelina – 6.2%, Kyrgyzskaya Prevoskhodnaya – 5.34%. The size of the fruit is one of the characteristic varietal properties, despite the fact that it is largely determined by the cultivation conditions, the agricultural technology used, the age of the plant, its crop load, the variety-rootstock combination, as well as a number of other circumstances. The highest fruit weights are shown by the following varieties: Big Heart - 39.1 g, Kyrgyzskaya Prevoskhodnaya - 46.3 g, Zheltaya Afaska - 53.3 g, Zheltaya Large - 56.0 g, Kabardinskaya Rannyaya - 59.0 g, Fortuna - 65.1 g, Black Star - 78.7 g, Byron Gold - 84.2 g, Grossa de Felicio - 85.3 g, Angelina - 87.0 g, Ti Chi San - 97.1 g, Burbank Giant - 120.0 g.

DAVOS: Dwarf Active Galactic Nuclei from Variability for the Origins of Seeds: Properties of Variability-selected Active Galactic Nuclei in the COSMOS Field and Expectations for the Rubin Observatory

We study the black hole mass–host galaxy stellar mass relation, M BH–M *, of a sample of z < 4 optically variable active galactic nuclei (AGNs) in the COSMOS field. The parent sample of 491 COSMOS AGNs were identified by optical variability from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP) program. Using publicly available catalogs and spectra, we consolidate their spectroscopic redshifts and estimate virial black hole masses using broad-line widths and luminosities. We show that variability searches with deep, high-precision photometry like the HSC-SSP can identity AGNs in low-mass galaxies up to z ∼ 1. However, their black holes are more massive given their host galaxy stellar masses than predicted by the local relation for active galaxies. We report that z ∼ 0.5–4 variability-selected AGNs are meanwhile more consistent with the M BH–M * relation for local inactive early-type galaxies. This result is in agreement with most previous studies of the M BH–M * relation at similar redshifts and indicates that AGNs selected from variability are not intrinsically different from the broad-line Type 1 AGN population at similar luminosities. Our results demonstrate the need for robust black hole and stellar mass estimates for intermediate-mass black hole candidates in low-mass galaxies at similar redshifts to anchor this scaling relation. Assuming that these results do not reflect a selection bias, they appear to be consistent with self-regulated feedback models wherein the central black hole and stars in galaxies grow in tandem.

Оценка сортов сливы для специфических условий предгорий Кабардино-Балкарии

Abstract. The need for constant updating of the plum assortment in the foothills of Kabardino-Balkaria is caused by the imperfection of cultivated varieties. In this regard, we are conducting a variety study of varieties of homemade plum for the subsequent selection of the best of them. As a result, cultivars with the best in a number of valuable features and properties were identified. One of the important indicators for the comparative assessment of the studied plum varieties in the conditions of the region are the flowering time, yield and commercial qualities of fruits, as they characterize the resistance of the variety to adverse factors and its economic efficiency. Medium- and late-flowering varieties are considered more valuable, due to the fact that they escape the destructive effects of recurrent frosts and, as a rule, are characterized by regular fruiting. Milena, Early Hermenchik, Fortuna, October Sun, Top Hit, Byron Gold and the Grand Duke are among the studied cultivars with a late onset of flowering. In the middle term, they bloom – Big Prince, Kyrgyz excellent, Kuban comet, Kabardian early, Top Giant, Angelino, Black Star. All the studied varieties entered the period of full economic fruiting and began to yield high yields. In this regard, varieties with yields in terms of 1 ha are qualitatively distinguished: Kyrgyz excellent – 54 t/ha, Kabardian early – 35.3 t/ha, Top Giant – 34 t/ha, Byron Gold – 33.6 t/ha, Top Hit – 32.8 t/ha, Grand Duke – 32.1 t/ha, Chachak early – 31.9 t/ha, Big Hart – 31.5 t/ha, Ti chi san – 31.3 t/ha. A characteristic varietal feature is the size of the fruit, although to a large extent it depends on the growing conditions, the agricultural technology used, the age of the tree, the load of its harvest, rootstock and a number of other factors. Varieties have high fruit weight indicators: Ti chi san – 98,8 g, Angelina – 91,4 g, Top Giant – 90,1 g, Grosso de Felicio – 86,5 g, Byron Gold – 83,9 g, Oktouber San – 68,9 g, Kabardian early – 62,5 g, Yellow large – 56,4 g, Grand Duke – 52,6 g, Yellow Afaska – 42,3 g. Keywords: plum, varieties, adaptability, yield, commercial qualities of fruits

Targeting the Coronavirus SARS‑CoV‑2’s Envelope, Nucleocapsid, and Spike/ Spike RBD Protein: Computational Insight from Multiple Bioactive Compounds as Potential Anti-Viral Drug Candidates

Global health, social, and economic systems have been seriously threatened by the coronavirus disease (COVID-19) pandemic. In addition to the increasing number of deaths, thousands of COVID-19 survivors continue to experience life-altering illness. This study aimed to evaluate multiple bioactive compounds from various indigenous medicinal plants against the structural proteins of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including the envelope, nucleocapsid, and spike/spike receptor-binding domain (RBD) proteins, in search of potential antiviral drug candidates. Computational analysis was used to screen for binding affinities and assess chemical interactions between ligands and target proteins. The findings revealed the top three potential compounds to bind to the envelope protein (cafestol, kahweol, and ledene), nucleocapsid protein (cafestol, kahweol, and thearubigin), spike protein (tannic acid, eugeniin, and kahweol), and spike RBD protein (kahweol, cafestol, and tannic acid). Moreover, the study identified four types of plants that contain potential bioactive compounds against SARS-CoV-2 structural proteins, including black tea (Camellia sinensis), clove (Syzygium aromaticum), common bean (Phaseolus vulgaris), and star anise (Illicium verum). Interestingly, kahweol exhibited possible binding activity against all four target proteins. This result suggests that bioactive compounds from the listed medicinal plants could potentially be developed into antiviral drugs against COVID-19.

Production and evaluation of the physicochemical and antioxidant properties of fruit jam from star fruit, hog plum and black plum

Tropical fruits such as black plum, star fruit, and hog plum are excellent sources of phytochemicals which are essential for human health but the back drop of these fruits is their perishability, leading to tones of postharvest losses. To address these concerns, these fruits could be utilized in jam processing to further extend their shelf lives. This research work on production and quality evaluation of mixed-fruit jam produced from star fruit, hog plum, and black plum using mixture experimental design of response surface methodology was undertaken to improve the utilization of these underutilized fruits in jam processing. The produced mixed fruit jams were assessed for physicochemical and antioxidant properties using standard methods. Statistical analysis and optimization of mixture variables were carried out using Design-Expert software version 6.0.8 while means were separated using ANOVA and significance accepted for p≤0.05 using Duncan ranged multivariate test using the IBM SPSS Statistics software version 22. Result of analysis for physicochemical properties showed that pH of the fruit jams ranged from 3.41 to 4.46, titratable acidity 0.33 to 0.48 %, total solids 44.35 to 75.07 %, while the range of 53.22–74.65°Brix was recorded for total sugar and 19.94 to 25.64 mPas for viscosity. Antioxidant properties of the fruit jams ranged from 310.34 to 471.57 mg/ml for DPPH and ranged from 526.64 to 650.26 mmol.AAE/g for FRAP. The result of mixture variable optimization showed that optimal responses, jam should be produced from fruit combination comprising 8.43 %-star fruit, 91.57 % black plum and 0 % hog plum with 60 % desirability or experimental run comprising 5.08 %-star fruit, 90.39 % hog plum and 4.53 % black plum with 58 % desirability

Genetic variability and association studies of marketable traits in gladiolus (Gladiolus hybridus)

The experiment was conducted during 2017–18 and 2018–19 at instructional farm, College of Horticulture, Banda University of Agriculture and Technology, Banda, Uttar Pradesh, to study the genetic variation, correlation and path analysis in gladiolus (Gladiolus hybridus Hort.) in Bundelkhand region of Uttar Pradesh. 14 varieties of gladiolus, viz. Black Star, Peter Pears, Gold Star, Trader Horn, Pink Rose, White Prosperity, Red White, Novalux, Yellow Gold, Candyman, Willas Pink, Jester, Nathan Red and Punjab Morning were planted in randomized block design (RBD). All parameters showed significant differences indicating that genotypes have a lot of variation. Length of the spike varied from 65.07 to 110.65 cm and size of the floret from 8.27 to 9.66 cm. Mean values for time to flowering, size of floret and vase life were 109.38 days, 8.95 cm and 8.95 days, respectively. Length of rachis (19.97 and 15.90), spike (18.49 and 14.40) and florets/spike (14.88 and 12.05) showed moderate values for PCV and GCV. Maximum heritability value was oberved in days to flowering (68.22) and minimal in floret size (35.63). Positive and significant correlations were found between plant height, length of spike and rachis, florets/spike and days to flowering. Path coefficient study revealed that length of spike (1.162), days to spike initiation (0.881) and blooming time (0.392) had biggest positive direct effects on plant height.

Genetic variability and association studies of marketable traits in gladiolus (Gladiolus hybridus)

The experiment was conducted during 2017–18 and 2018–19 at instructional farm, College of Horticulture, Banda University of Agriculture and Technology, Banda, Uttar Pradesh, to study the genetic variation, correlation and path analysis in gladiolus (Gladiolus hybridus Hort.) in Bundelkhand region of Uttar Pradesh. 14 varieties of gladiolus, viz. Black Star, Peter Pears, Gold Star, Trader Horn, Pink Rose, White Prosperity, Red White, Novalux, Yellow Gold, Candyman, Willas Pink, Jester, Nathan Red and Punjab Morning were planted in randomized block design (RBD). All parameters showed significant differences indicating that genotypes have a lot of variation. Length of the spike varied from 65.07 to 110.65 cm and size of the floret from 8.27 to 9.66 cm. Mean values for time to flowering, size of floret and vase life were 109.38 days, 8.95 cm and 8.95 days, respectively. Length of rachis (19.97 and 15.90), spike (18.49 and 14.40) and florets/spike (14.88 and 12.05) showed moderate values for PCV and GCV. Maximum heritability value was oberved in days to flowering (68.22) and minimal in floret size (35.63). Positive and significant correlations were found between plant height, length of spike and rachis, florets/spike and days to flowering. Path coefficient study revealed that length of spike (1.162), days to spike initiation (0.881) and blooming time (0.392) had biggest positive direct effects on plant height.

BK Viremia and Viruria Does Not Depend on the Type of Double-J Stent Used During Kidney Transplantation.

BK virus is a major cause of chronic renal allograft failure.Transplant ureteral stent use has been reported as a risk factorfor BK virus infection. Recently, the use of a new type of ureteral stent (Magnetic Black Star) was reported in kidney transplant recipients. The aim ofthis preliminary report was to compare BK virus viremia and viruria occurrence depending on the type of double-J stent (standard versus Magnetic Black Star). We included all kidney transplants performed in our center from January to December 2022. Each case had double-J stent placement. Indwelling stents were either a 6- or 7-Fr standard double-J stent or a 6-Fr Magnetic Black Star double-J stent. The type of double-J stent was chosen according to the surgeon's preference. A standard BK virus screening protocol was followed during the study period, which consisted of routine polymerase chain reaction examination of plasma and urine samples during monthly follow-ups. We assessed 120 patients without missing data: 92 patients received standard double-J stents and 28 patients received Magnetic Black Star stents. Patients were mostly male in the standard group (70.7%) versus the Magnetic Black Star group (42.9%) (P = .01). ABO- and HLA-incompatible transplant rates were similar in both groups. BK viremia occurrence and BK viruria occurrence were similar between groups at 1 month, 3 months, and 6 months. This preliminary study showed no differences concerning BKvirus infection depending on the type of double-J stents used during kidney transplant.

Dossier 2: Getting Out the News: Historical Documents

Abstract: Historical scholarship on Finally Got the News (1970) has prioritized the production of the film, in large part at the cost of its subsequent circulation as a filmic text and political document. However, in emphasizing production, such histories neglect the tedious and no less contentious process of distributing the film through the auspices of the League of Revolutionary Black Workers' limited resources. This Dossier provides an account of Black Star Productions, the filmmaking arm of the League, and its efforts to distribute Finally Got the News to institutional and noncommercial venues alike. Black Star is also considered beyond its relation to Finally Got the News as a short-lived independent production and distribution unit. This account is buttressed by the reproduction of historical materials relevant to the production, exhibition, and distribution of Finally Got the News and to the inner workings of Black Star Productions.

The invisible black widow PSR J1720-0534: implications for the electron density towards the North Polar Spur

Abstract Radio emission from pulsars can be used to map out their distances through dispersion measure (DM), which quantifies the amount of radio pulse dispersion. However, this method relies on accurately modeling the free electron density in the line of sight. Here, we present a detailed study of the multi-wavelength emission from PSR J1720-0534, a black widow compact binary millisecond pulsar discovered in 2021, which the latest electron density model of the Galaxy (YMW16; Yao et al. 2017) places at only 191 pc. We obtained and analyzed deep multi-wavelength observations in the γ-ray (Fermi-LAT, 2008-2022), optical (LCO, 2.7-h), near-infrared (NOT, 3.5-h) and X-ray (Swift-XRT, 10 ksec) bands. We found no significant detection of γ-ray, optical, near-infrared, or X-ray counterparts around the radio-timing position of PSR J1720-0534, which we thus nickname ‘the invisible black widow’. Employing the most constraining near-infrared limit (J &amp;gt; 23.4 mag), we established a lower limit on the source distance, d &amp;gt; 1.1 kpc, assuming conservative properties for the black widow companion star. This distance lower limit differs drastically (by a factor of more than five) from the YMW16 DM distance estimate. We attribute this difference to the inclusion in the YMW16 model of a large and dense component towards the North Polar Spur. Considering our results and recent parallax distances to other pulsars in this direction, we argue that such a local and large component in the electron density model of the Galaxy is unnecessary.

Quantum Scalar Fields Interacting with Quantum Black Hole Asymptotic Regions

We continue our work on the study of spherically symmetric loop quantum gravity coupled to two spherically symmetric scalar fields, with one that acts as a clock. As a consequence of the presence of the latter, we can define a true Hamiltonian for the theory. In previous papers, we studied the theory for large values of the radial coordinate, i.e., far away from any black hole or star that may be present. This makes the calculations considerably more tractable. We have shown that in the asymptotic region, the theory admits a large family of quantum vacua for quantum matter fields coupled to quantum gravity, as is expected from the well-known results of quantum field theory on classical curved space-time. Here, we study perturbative corrections involving terms that we neglected in our previous work. Using the time-dependent perturbation theory, we show that the states that represent different possible vacua are essentially stable. This ensures that one recovers from a totally quantized gravitational theory coupled to matter the standard behavior of a matter quantum field theory plus low probability transitions due to gravity between particles that differ at most by a small amount of energy.

The Precursor of GRB211211A: A Tide-induced Giant Quake?

The equilibrium configuration of a solid strange star in the final inspiral phase with another compact object is generally discussed, and the starquake-related issue is revisited, for a special purpose to understand the precursor emission of binary compact star merger events (e.g., that of GRB211211A). As the binary system inspirals inward due to gravitational wave radiation, the ellipticity of the solid strangeon star increases due to the growing tidal field of its compact companion. Elastic energy is hence accumulated during the inspiral stage which might trigger a starquake before the merger when the energy exceeds a critical value. The energy released during such starquakes is calculated and compared to the precursor observation of GRB211211A. The result shows that the energy might be insufficient for binary strangeon-star case unless the entire solid strangeon star shatters, and hence favors a black hole-strangeon star scenario for GRB211211A. The timescale of the precursor as well as the frequency of the observed quasi-periodic-oscillation have also been discussed in the starquake model.

“Tidal Peeling Events”: Low-eccentricity Tidal Disruption of a Star by a Stellar-mass Black Hole

Close encounters between stellar-mass black holes (BHs) and stars occur frequently in dense star clusters and in the disks of active galactic nuclei. Recent studies have shown that in highly eccentric close encounters, the star can be tidally disrupted by the BH in a microtidal disruption event (microTDE), resulting in rapid mass accretion and possibly bright electromagnetic signatures. Here we consider a scenario in which the star might approach the stellar-mass BH in a gradual, nearly circular inspiral, under the influence of dynamical friction in a circum-binary gas disk or three-body interactions in a star cluster. We perform hydrodynamics simulations of this scenario using the smoothed particle hydrodynamics code PHANTOM. We find that under certain circumstances (for initial eccentricity e 0 ≳ 0.4 and penetration factor β = 1, or e 0 < 0.4 and β ≲ 0.67), the mass of the star is slowly stripped away by the BH. We call this gradual tidal disruption a “tidal-peeling event.” Additionally, we discover that some low-eccentricity microTDEs (e 0 < 0.4 and β = 1) are a new form of fast luminous transients similar to parabolic microTDEs. Depending on the initial distance and eccentricity of the encounter, these low-eccentricity microTDEs might exhibit significant accretion rates and orbital evolution distinct from those of a typical (eccentric) microTDE.

Is a College Professor Capable of Being A Psychopath? A Character Study from the Campus Novel Black Star

Literature reflects society. People study literature to better comprehend their own and other people's experiences. People in all civilizations interact with one another, and as a result, bonds form. Education makes a person more civilized. Campus life is considered as the most flamboyant days of a person. In Canada Undergraduate degree or Bachelor’s Degree requires 3 to 5 years of study. Canada has some of the prestigious universities. When speaking about campus fiction the most customary or habitual way we analyze the same is how campus life is reciprocating student life and vice versa. At the same time campus novels do give a focus on the life of lecturers and faculties but it’s much fewer. In the novel Black Star by Maureen Medwed interestingly portrays a female philosophy professor named Del Hanks. Studies has been conducted based on Canadian Fiction but there is a lack of study on the 21st century academic fiction that too written by a female author. In the novel Black Star, the central character is female professor her hardships and difficult phases are been described with the inner lining application of trauma. But interestingly nowhere in the novel the word trauma is been used.

“In the Name of the God of All Names: Yahweh, Obatalá, Olorum”: The 1981 Quilombos Mass as an Ecumenical Pilgrimage in Brazil

AbstractOn November 22, 1981, thousands of laypeople, along with bishops, priests, and theologians, gathered in Recife to celebrate the Eucharist. Offered during a military dictatorship in a period of popular insurgency, the Quilombos Mass mourned the death of millions in the African slave trade, sought pardon for the Church's past sins, and celebrated the resistance of Blacks in Brazil and beyond its borders. The acclaimed Black Brazilian pop star and activist Milton de Nascimento collaborated with an activist poet and three bishops to produce a multimedia performance; in the spirit of liberation theology, it was marked by striking visuals, dance, music, and the invocation of the sacred. This article draws on reportage, speeches and correspondence, military court and intelligence records, published interviews, and the author's interview with one of its composers. It offers a close textual analysis, with attention to Catholic theological debates, as well as an analysis of the performance itself, drawn from video recordings and bringing attention to aspects neglected by most commentators, who refer only to the album, as it was finally produced. Initially stifled by the Vatican, Milton's masterpiece, issued as an album on vinyl and performed in paid concerts, became a powerful cultural reference for activists, serving as a touchstone for a strategic alliance between Black activists and the liberationist Church.

“Blame it on the Black Star”: Black Holes in Culture

“Black holes” continue to compel the human imagination, as demonstrated by the public reception of the first images of a black hole produced by the Event Horizon Telescope in 2019 or the success of Hollywood science fiction movies like Christopher Nolan’s 2014 film Interstellar that depicts what it might be like to fall into one. My study traces the discovery of “black holes” in the 20th century – collapsed stars with so much gravity that nothing can escape them, not even light – regarding how scientists talked about them and their emergence in popular culture. This begins with discussing how influential scientists weighed in on the concept and how the scientific community finally settled on the term “black hole.” The study then considers various ways black holes have percolated into every aspect of culture: from TV to movies, popular science to modern rock. It concludes with a consideration of the more recent turn in the cultural meaning of this “exotic object,” particularly as it relates to the myth of the lone scientist, women scientists, and the climate crisis, but also the risk of nuclear war.

Black Hole Growth, Baryon Lifting, Star Formation, and IllustrisTNG

Abstract Quenching of star formation in the central galaxies of cosmological halos is thought to result from energy released as gas accretes onto a supermassive black hole. The same energy source also appears to lower the central density and raise the cooling time of baryonic atmospheres in massive halos, thereby limiting both star formation and black hole growth, by lifting the baryons in those halos to greater altitudes. One predicted signature of that feedback mechanism is a nearly linear relationship between the central black hole’s mass (M BH) and the original binding energy of the halo’s baryons. We present the increasingly strong observational evidence supporting a such a relationship, showing that it extends up to halos of mass M halo ∼ 1014 M ⊙. We then compare current observational constraints on the M BH–M halo relation with numerical simulations, finding that black hole masses in IllustrisTNG appear to exceed those constraints at M halo &lt; 1013 M ⊙ and that black hole masses in EAGLE fall short of observations at M halo ∼ 1014 M ⊙. A closer look at IllustrisTNG shows that quenching of star formation and suppression of black hole growth do indeed coincide with black hole energy input that lifts the halo’s baryons. However, IllustrisTNG does not reproduce the observed M BH–M halo relation because its black holes gain mass primarily through accretion that does not contribute to baryon lifting. We suggest adjustments to some of the parameters in the IllustrisTNG feedback algorithm that may allow the resulting black hole masses to reflect the inherent links between black hole growth, baryon lifting, and star formation among the massive galaxies in those simulations.

Evaluation of Several Genotypes of Vigna radiata Bean for Spraying with Manganese and Zinc and Their Effects on Growth Characteristics

Three cultivars of the crop Almash (Green Indian VC6089A10, Green Indian VC6173B1319, and Black Indian Gold Star) were tested in a field experiment during the 2022 growing season in Ramadi, Anbar province, to determine the impact of spraying levels of zinc (0, 25, and 50) mg Zn L-1 and manganese (0, 30, and 60) mg Mn L-1 on some growth characteristics. The experiment was conducted using a randomized complete block design (RCBD) with three replicates, with each treatment being tested in a separate split plot. The study found that there were statistically significant differences between zinc levels, with the level giving 50 mg Zn L-1 having the highest rates for plant height (54.30 cm), number of branches per plant (7.34), plant branch-1, number of days from planting to flowering (40 days), leaf area (204.19) cm-1, and leaf chlorophyll content (33.93) (g), and the rate of crop growth (17.39) g, while the level exceeding 30 mg Mn L-1 had lower rates for plant height (These indicators were profoundly influenced by zinc spraying, manganese spraying, and different types of mung bean crops.

When the penny drops: sharks outsmart cichlids in serial reversal learning

Abstract Two species of fish were tested in a serial reversal learning task using two dimensional objects varying in colour and/or form. After reaching the learning criterion (LC) in the original discrimination task, individuals reversed for up to ten times, i.e., stimulus association was switched and animals rewarded for choosing the stimulus that had not been rewarded in the previous learning phase. This was conducted using the two stimuli green diamond (S+) vs. red square (S−) for the training of eight cichlids, and black star (S+) vs. black circle (S−) for the training of seven bamboo sharks. All fifteen animals completed the initial training phase and reversed successfully at least three times, indicating an ability to forsake a previously learned stimulus association in favour of a new one. Sharks, but not cichlids, also showed a decrease in the number of sessions needed to reach LC with an increase in the number of reversals conducted, showing that some sort of learning strategy, i.e., rule learning, had been applied. Animals that improve their performance within such learning paradigms are considered to possess more behavioural flexibility and advanced cognitive abilities than those who do not. More flexibility could specifically aid species living in complex habitats, social groups and subjected to changing environmental conditions.

Galaxy Cruise: Deep Insights into Interacting Galaxies in the Local Universe

Abstract We present the first results from GALAXY CRUISE, a community (or citizen) science project based on data from the Hyper Suprime-Cam Subaru Strategic Program (HSC-SSP). The current paradigm of galaxy evolution suggests that galaxies grow hierarchically via mergers, but our observational understanding of the role of mergers is still limited. The data from HSC-SSP are ideally suited to improve our understanding with improved identifications of interacting galaxies thanks to the superb depth and image quality of HSC-SSP. We launched a community science project, GALAXY CRUISE, in 2019 and have collected over two million independent classifications of 20686 galaxies at z &amp;lt; 0.2. We first characterize the accuracy of the participants’ classifications and demonstrate that it surpasses previous studies based on shallower imaging data. We then investigate various aspects of interacting galaxies in detail. We show that there is a clear sign of enhanced activities of super-massive black holes and star formation in interacting galaxies compared to those in isolated galaxies. The enhancement seems particularly strong for galaxies undergoing violent mergers. We also show that the mass growth rate inferred from our results is roughly consistent with the observed evolution of the stellar mass function. The second season of GALAXY CRUISE is currently underway and we conclude with future prospects. We make the morphological classification catalog used in this paper publicly available at the GALAXY CRUISE website, which will be particularly useful for machine-learning applications.