Astronomy and Astrophysics – Astronomy
Scientific paper
May 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jsara...2...35c&link_type=abstract
Journal of the Southeastern Association for Research in Astronomy, vol. 2, p. 35-38
Astronomy and Astrophysics
Astronomy
Accretion, Accretion Disks, Binaries: Close, Novae, Cataclysmic Variables
Scientific paper
Cataclysmic variable (CV) stars are close binary systems withtypically a white dwarf primary accreting from a low-mass main-sequencesecondary star. One useful technique to study these systemsobservationally is through time-series spectroscopy. We presentin this paper a method by which synthetic line profiles can be producedusing our CV modeling program FITDisk, which implements the method ofsmoothed particle hydrodynamics. Because we compute thevelocities and instantaneous energy dissipation (``luminosity'') of allthe particles in a simulation, it is relatively simple to synthesizeline profiles as a function of simulation time. In this work, wesimulated the accretion disk of a negatively superhumping CV, where theaccretion stream bright spot migrates in turn across the two faces of atilted, slowly-precessing accretion disk. We are then able toformat these data to observe how the emission line profiles change as afunction of viewing angle.
Cardenzana Joshua V.
Wood Matt A.
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