A search for EUV emission from cataclysmic variables
Abstract
Voyager far- and extreme-ultraviolet (500--1200 /angstrom/) spectrophotometric observations of five cataclysmic variables (the dwarf novae SS Cyg and VW Hyi and the novalike variables V3885 Sgr, RW Sex, and IX Vel) are combined with neutral hydrogen column densities derived from the curve-of-growth analysis of interstellar absorption lines in high-resolution IUE spectra to place upper limits on the emitted flux in the 600--700 /angstrom/ EUV band. No EUV emission was observed in any of the five cataclysmic variables. Relatively high neutral hydrogen column densities (> 10/sup 19/ cm/sup /minus/2/) in SS Cyg, V3885 Sgr, RW Sex, and IX Vel preclude any discussion of their intrinsic EUV emission. For VW Hyi, the low neutral hydrogen column, and excellent Voyager data place severe upper limits on the intrinsic EUV flux of this cataclysmic variable. The derived EUV limits for VW Hyi are compared to predictions from various models and Voyager observations of EUV emission from nearby hot white dwarfs. 8 refs., 2 figs., 2 tabs.
- Authors:
- Publication Date:
- Research Org.:
- Los Alamos National Lab., NM (USA)
- OSTI Identifier:
- 6458320
- Report Number(s):
- LA-UR-89-639; CONF-890189-2
ON: DE89008012
- DOE Contract Number:
- W-7405-ENG-36
- Resource Type:
- Conference
- Resource Relation:
- Conference: Berkeley colloquium on extreme ultraviolet astronomy, Berkeley, CA, USA, 19 Jan 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; VARIABLE STARS; EXTREME ULTRAVIOLET SPECTRA; VOYAGER SPACE PROBES; SPACE VEHICLES; SPECTRA; STARS; VEHICLES; 640102* - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
Citation Formats
Polidan, R S, and Mauche, C W. A search for EUV emission from cataclysmic variables. United States: N. p., 1989.
Web.
Polidan, R S, & Mauche, C W. A search for EUV emission from cataclysmic variables. United States.
Polidan, R S, and Mauche, C W. 1989.
"A search for EUV emission from cataclysmic variables". United States.
@article{osti_6458320,
title = {A search for EUV emission from cataclysmic variables},
author = {Polidan, R S and Mauche, C W},
abstractNote = {Voyager far- and extreme-ultraviolet (500--1200 /angstrom/) spectrophotometric observations of five cataclysmic variables (the dwarf novae SS Cyg and VW Hyi and the novalike variables V3885 Sgr, RW Sex, and IX Vel) are combined with neutral hydrogen column densities derived from the curve-of-growth analysis of interstellar absorption lines in high-resolution IUE spectra to place upper limits on the emitted flux in the 600--700 /angstrom/ EUV band. No EUV emission was observed in any of the five cataclysmic variables. Relatively high neutral hydrogen column densities (> 10/sup 19/ cm/sup /minus/2/) in SS Cyg, V3885 Sgr, RW Sex, and IX Vel preclude any discussion of their intrinsic EUV emission. For VW Hyi, the low neutral hydrogen column, and excellent Voyager data place severe upper limits on the intrinsic EUV flux of this cataclysmic variable. The derived EUV limits for VW Hyi are compared to predictions from various models and Voyager observations of EUV emission from nearby hot white dwarfs. 8 refs., 2 figs., 2 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/6458320},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}