Schlegel, E. M. ; Shipley, H. V. ; Rana, V. R. ; Barrett, P. E. ; Singh, K. P. (2014) X-ray emission line spectroscopy of cataclymic variables. II. Temperature and densities from line ratios in the Chandra HETG band The Astrophysical Journal, 797 (1). p. 38. ISSN 0004-637X
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Official URL: http://iopscience.iop.org/article/10.1088/0004-637...
Related URL: http://dx.doi.org/10.1088/0004-637X/797/1/38
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 1012 to >1016 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Astronomical Society. |
| Keywords: | Novae; Cataclysmic Variables; Stars: Dwarf Novae; X-rays: Binaries |
| ID Code: | 99137 |
| Deposited On: | 20 Oct 2015 06:50 |
| Last Modified: | 20 Oct 2015 06:51 |
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