Published December 10, 2014
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Journal Article
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X-Ray Emission Line Spectroscopy of Cataclysmic Variables. II. Temperatures and Densities from Line Ratios in the Chandra HETG Band
Abstract
We summarize the results of a line-by-line fitting analysis of the available spectra obtained using the Chandra High-Energy Transmission Grating. We confirm the existence of broad ionization and electron temperature ranges and high number densities in cataclysmic variables (CVs) of all subtypes. Temperatures range from ~0.4 keV to ~5-10 keV or more with a broad range detected in any given CV. In other words, single-temperature models do not describe the line emission. Number densities also cover a broad range, from 10^(12) to >10^(16) cm^(–3). We demonstrate that much of the plasma is in a nonequilibrium state; the Fe emission, however, may arise from plasma in the ionization equilibrium.
Additional Information
© 2014 American Astronomical Society. Received 2012 May 29; accepted 2013 March 26; published 2014 November 24. We thank the referee for comments that improved the quality of this paper. E.M.S. acknowledges support from the Chandra X-ray Center through archival grant AR9-0005X to UTSA and partial support from the Vaughan Family endowment.Attached Files
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Additional details
- Eprint ID
- 53165
- Resolver ID
- CaltechAUTHORS:20150105-092723340
- AR9-0005X
- NASA
- Vaughan Family endowment
- Created
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2015-01-05Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field