F. H. Cheng et al 1997 ApJ 484 L149 doi:10.1086/310794
F. H. Cheng1,2, Edward M. Sion1, Paula Szkody3 and Min Huang1
Show affiliationsWe present Hubble Space Telescope Goddard High-Resolution Spectrograph G140L spectra of the white dwarf in WZ Sge, exposed during quiescence. Our best-fitting synthetic spectra yield a rapidly rotating white dwarf with velocity Vrot sin i = 1200+ 300−400 km s-1, white dwarf effective temperature Twd = 14,800 K, the gravity log g = 8.0, and the chemical abundances relative to solar in number (with 3σ error bars) of C, 5.0+ 2.0−2.0; N, 3.0+ 1.0−1.0; and Si, <0.1. We also reexamined a previous Hubble Space Telescope Faint Object Spectrograph G130H spectrum reported by Sion and coworkers and obtained consistent values, but lower C and N abundances. We do not detect a measurable systematic shift in our observed spectra, presumably due to the extremely low mass of the companion.
novae, cataclysmic variables; stars: individual (WZ Sagittae); white dwarfs
Issue 2 (1997 August 1)
Received 1997 April 18, accepted for publication 1997 May 14
F. H. Cheng et al 1997 ApJ 484 L149
Dandan Huang et al 2009 J. Neural Eng. 6 046005
J. Colin et al 2007 EPL 78 16002
B G Sherstyukov et al 2007 Environ. Res. Lett. 2 045010
X Garbet et al 2004 Plasma Phys. Control. Fusion 46 B557
M. D. Caballero-García et al. 2009 ApJ 692 1339
Saburo Takahashi and Sadamichi Maekawa 2008 Sci. Technol. Adv. Mater. 9 014105
R. D. Blum et al. 2001 The Astronomical Journal 122 1875
T. D. Arber et al. 2009 ApJ 705 1183
Barbara Ancarani(Production Editor) et al 2008 EPL 81 20000