Spectroscopy of FO Aquarii: Evidence for Reprocessing in a Hot Wind
Abstract
Results are presented on spectroscopic observations of FO Aqr, carried out on the nights of September 4-7, 1986 with the 1.8-m Perkins Telescope at Lowell Observatory. It is shown that the observed 21-min modulation of the He II 4686-A line is driven by two emission components which vary in flux and have large negative radial velocities. Arguments are presented to the effect that the modulated portion of the He II 4686-A emission originates from the reprocessing of X-rays in hot winds at these two sites. It is suggested that all other 21-min modulations are due to reprocessing.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- January 1991
- DOI:
- 10.1086/169561
- Bibcode:
- 1991ApJ...366..286M
- Keywords:
-
- Astronomical Spectroscopy;
- Cataclysmic Variables;
- Stellar Mass Accretion;
- Stellar Winds;
- White Dwarf Stars;
- Emission Spectra;
- H Lines;
- Light Curve;
- Magnetic Stars;
- Stellar Spectra;
- X Ray Spectra;
- Astrophysics;
- STARS: ACCRETION;
- STARS: BINARIES;
- STARS: INDIVIDUAL CONSTELLATION NAME: FO AQUARII;
- STARS: MAGNETIC;
- X-RAYS: BINARIES