The Early X-Ray Emission from V382 Velorum (Nova Velorum 1999): An Internal Shock Model
Abstract
We present the results of ASCA and RXTE observations of the early X-ray emission from the classical nova V382 Velorum. Its ASCA spectrum was hard (kT~10 keV) with strong (1023 cm-2) intrinsic absorption. In the subsequent RXTE data, the spectra became softer, because of both a declining temperature and a diminishing column. We argue that this places the X-ray emission interior to the outermost ejecta produced by V382 Vel in 1999, and therefore it must have been the result of a shock internal to the nova ejecta. The weakness of the Fe Kα lines probably indicates that the X-ray-emitting plasmas are not in ionization equilibrium.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- April 2001
- DOI:
- 10.1086/320220
- arXiv:
- arXiv:astro-ph/0101026
- Bibcode:
- 2001ApJ...551.1024M
- Keywords:
-
- Stars: Novae;
- Cataclysmic Variables;
- stars: individual (V382 Velorum);
- X-Rays: Stars;
- Astrophysics
- E-Print:
- 16 pages (including 4 figures), accepted for publication in ApJ