Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.299..545s&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 299, Issue 2, pp. 545-553.
Astronomy and Astrophysics
Astronomy
13
Accretion, Accretion Discs, Line: Profiles, Binaries: Eclipsing, Binaries: Spectroscopic, Stars: Individual: V347 Pup, Novae, Cataclysmic Variables
Scientific paper
We present time-resolved optical spectroscopy of the deeply eclipsing nova-like binary V347 Pup, which provides evidence for a rotational velocity field in the low-excitation lines, as expected from accretion disc emission. The low-excitation line profiles are a composite of the disc and the irradiated inner-face of the donor star. This picture is remarkably simple compared to the other members of the eclipsing nova-like family. Unsatisfactory radial velocity solutions for the accreting object provided by standard methods encourage us to apply a technique developed to measure stellar motion from tomographic reconstructions of the time-dependent line profiles. We find some evidence for a spiral pattern over the disc and for disc-overflow accretion. If the emission distribution proves to be a long-term feature, V347 Pup will provide an opportunity to study disc kinematics with greater confidence than allowed by the other eclipsing nova-like objects.
Buckley David A. H.
Garlick Mark A.
Still Martin D.
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