EUVE Phase-Resolved Spectroscopy of V834 Centauri
| dc.creator | Mauche, Christopher W. | |
| dc.date | 2002-06-17 | |
| dc.date.accessioned | 2026-07-07T02:03:59Z | |
| dc.date.available | 2026-07-07T02:03:59Z | |
| dc.description | (abridged) The Extreme Ultraviolet Explorer (EUVE) satellite was employed in 1999 February to acquire phase-resolved EUV photometric and spectroscopic observations of the AM Her-type cataclysmic variable V834 Centauri. Although we do not understand the EUV light curves in detail, they are explained qualitatively by a simple model of accretion from a ballistic stream along the field lines of a tilted magnetic dipole centered on the white dwarf. The 75-140 Angstrom EUVE spectra are well described by either a blackbody or a pure-H stellar atmosphere absorbed by a neutral hydrogen column density, but constraints on the size of the EUV emission region and its UV brightness favor the blackbody interpretation with temperature kT ~ 17.6 eV, hydrogen column density N_H ~ 7.4x10^{19} cm^{-2}, fractional emitting area f ~ 10^{-3}, and luminosity L_soft ~ 7.2x10^{32} (d/100 pc)^2 erg s^{-1}. The ratio of the EUV to X-ray luminosities is L_soft/L_hard ~ 40, signaling that some mechanism other than irradiation (e.g., blob heating) dominates energy input into the accretion spot. | |
| dc.description | 23 pages including 1 table and 9 encapsulated postscript figures; LaTeX format, uses aastex.cls; accepted on 2002 June 17 for publication in The Astrophysical Journal | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0206290 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0206290 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/4584 | |
| dc.subject | Astrophysics | |
| dc.title | EUVE Phase-Resolved Spectroscopy of V834 Centauri | |
| dc.type | text |