Spectroscopic Diagnostics of Symbiotic Stars III. Radial Velocity Analyses of HBV 475

Details Spectroscopic Diagnostics of Symbiotic Stars III. Radial Velocity Analyses of HBV 475 Spectroscopic Diagnostics of Symbiotic Stars III. Radial Velocity Analyses of HBV 475

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000pasj...52..589i&link_type=abstract

Publications of the Astronomical Society of Japan, v.52, p.589-599.

Astronomy and Astrophysics

Astronomy

11

Line Profiles, Spectroscopy, Stars: Binaries, Stars: Individual (Hbv 475), Stars: Symbiotic

Scientific paper

We present highly resolved spectroscopic data of HBV 475 (= V 1329 Cyg) in the optical region, which have been obtained during the past 10 years at the Okayama Astrophysical Observatory. We analyzed line profiles of Hα , Hγ , He II lambda 4686, [O III] lambda 5007, and [Fe VII] lambda 6086 using Gaussian de-convolution method, and investigated the variation of individual components of the profiles as a function of the orbital phase. We revised the mass function obtained from the orbital elements of the hot star as f_h(M) ~ 1.2 +/- 0.3 MO . It differs considerably from previously published values, which were larger than 20 MO . However, our new mass function is more reasonable for a symbiotic system consisting of a red giant and a hot star, which is currently presumed to be a white dwarf. Finally, we suggest a descriptive model of line-emitting regions in the HBV 475 binary, which explains the basic variation in the line profiles and agrees with the main features of the HST image.

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