Ultraviolet light curves of the dwarf novae U Geminorum and VW Hydri

Abstract

view Abstract Citations (34) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet light curves of the dwarf novae U GEM and VW Hyd. Wu, C. -C. ; Panek, R. J. Abstract The optical light curves of many dwarf novae show a prominent hump. This hump is attributed to a hot spot located where the gas stream from the cool secondary star strikes the accretion disk around the white dwarf primary. In the present investigation, the energy distribution of the hot spot is obtained from the amplitude of the hump in different wavelength regions. The color temperature of the hot spot is derived, and the temperature and optical thickness for thermal free-free emission models for the spot is discussed. The nature of the disk is studied by comparing its UV-optical energy distribution with computed accretion disk models. The ultraviolet light curves of two quiescent dwarf novae, U Gem and VW Hyi is derived by combining Astronomical Netherlands Satellite (ANS) photometry from several different epochs. Publication: The Astrophysical Journal Pub Date: November 1982 DOI: 10.1086/160415 Bibcode: 1982ApJ...262..244W Keywords: Dwarf Novae; Light Curve; Spectral Energy Distribution; Stellar Mass Accretion; Ultraviolet Spectra; Visible Spectrum; Astronomical Netherlands Satellite; Optical Thickness; Stellar Color; Stellar Mass Ejection; Stellar Models; Stellar Spectrophotometry; Stellar Temperature; Thermal Emission; Astrophysics full text sources ADS | data products SIMBAD (5)