Abstract
On the basis of new speckle measurements with the 6 m telescope of the Special Astrophysical Observatory (Russia) and Hipparcos astrometry, an improved orbital solution with a period of P = 24.1 yr for the visual binary WOR 2 is obtained. The dynamical mass of the system is 1.40 ± 0.25 M⊙. Differential photometry (Δm = 0.55 mag) allowed us to estimate the luminosity of individual components (M = +8.0 and +8.6 mag), which in turn led to individual masses of 0.65 and 0.61 M⊙, in good agreement with the systemic mass. The slit spectra obtained with the 2.6 m telescope of the Byurakan Astrophysical Observatory (Armenia) show that in the combined light WOR 2 is a K6 dwarf, whereas individually the components according to their luminosities are likely to be K6–K7 and M0 dwarfs. The equivalent width of the Hα absorption line (0.9 A) is concordant with previous data, indicating the overall stability of this system.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
