Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...538..315m&link_type=abstract
The Astrophysical Journal, Volume 538, Issue 1, pp. 315-325.
Astronomy and Astrophysics
Astronomy
6
Accretion, Accretion Disks, Stars: Binaries: Spectroscopic, Stars: Novae, Cataclysmic Variables, Stars: Individual (Vy Sculptoris)
Scientific paper
The study of the Balmer radial velocity curve of the cataclysmic variable (CV) VY Scl has revealed a new value for the orbital period (0.232 days), which significantly differs from the previously accepted one. It also shows a gamma modulation that is compatible with the presence of a third component, indicating that this object could be a hierarchical triple system. The CV is a low-inclination (i~30deg) system with a massive white dwarf (M1~1.2 Msolar). There are two possibilities for the nature of the hypothetical third component: either a >=0.8 Msolar star or a low-luminosity higher mass star (probably a compact object). The value for the period of the third object orbit would be ~5.8 days, which makes the triple system dynamically stable.
Casares Jorge
Gonzalez Martinez-Pais I.
Martin-Hernandez N. L.
Rodríguez-Gil Pablo
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