Abstract
Aims. In this study, we present an update of a compilation of line width measurements of neutral atomic hydrogen (HI) galaxy spectra at 21 cm wavelength. Our All Digital HI (ADHI) catalog consists of the previous release augmented with our new HI observations and an analysis of archival data. This study provides the required HI information to measure the distances of spiral galaxies through the application of the Tully-Fisher (TF) relation. Methods. We conducted observations at the Green Bank telescope (GBT) and reprocessed spectra obtained at the Nançay radiotelescope by the Nançay Interstellar Baryons Legacy Extragalactic Survey and Kinematics of the Local Universe collaborations and we analyzed the recently published full completion Arecibo Legacy Fast ALFA (ALFALFA) 100% survey in order to identify galaxies with good quality HI line width measurements. Results. This paper adds new HI data adequate for TF use for 385 galaxies observed at GBT, 889 galaxies from archival Nançay spectra, and 1515 rescaled Arecibo ALFALFA spectra. In total, this release adds 1274 new good quality measurements to the ADHI catalog. Today, the ADHI database contains 18 874 galaxies, for which 15 433 have good quality data for TF use. The final goal is to compute accurate distances to spiral galaxies, which will be included in the next generation of peculiar velocities catalog: Cosmicflows-4.
Highlights
In 2006, we launched a large observational and theoretical program to study the large-scale structures and dynamics of the local Universe up to z ∼ 0.1
The Hi line widths data in our Cosmicflows catalogs come from our observations at Green Bank telescope (GBT) and our reprocessing of spectra obtained at other giant radio telescope archives such as Parkes, Nançay, Effelsberg, and Arecibo, which were all gathered in the All Digital HI catalog (ADHI, Courtois et al 2009, 2011; Courtois & Tully 2015)
The Kinematics of the Local Universe (KLUN), NIBLES, and Arecibo Legacy Fast ALFA (ALFALFA) data have already been processed by their own collaborations, with methodologies described in their respective literature, these data samples have been reprocessed with the analysis described in order to include them in the ADHI catalog, which gathers various HI data treated with that same procedure
Summary
In 2006, we launched a large observational and theoretical program to study the large-scale structures and dynamics of the local Universe up to z ∼ 0.1. We set up a distance-velocity calculator that is publicly accessible through the Extragalactic Distance Database (EDD). It is for any astronomer needing information on the local gravitational velocity field at a specified location in the local Universe (Kourkchi et al 2020a). The goal of this paper is to update the ADHI catalog, with 500 h of observations at GBT (program GBT18A021) conducted in 2018 and 2019, with remeasured Nançay data from the Kinematics of the Local Universe (KLUN) and Nançay. This paper presents rescaled newly available xArecibo Legacy Fast ALFA (ALFALFA) Arecibo data. (Haynes et al 2018)
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