On the Triple Nature of the Cataclysmic Variable VY Sculptoris

Details On the Triple Nature of the Cataclysmic Variable VY Sculptoris On the Triple Nature of the Cataclysmic Variable VY Sculptoris

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.

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