SIMBAD references

2014ApJ...797...38S - Astrophys. J., 797, 38 (2014/December-2)

X-ray emission line spectroscopy of cataclysmic variables. II. Temperatures and densities from line ratios in the Chandra HETG band.

SCHLEGEL E.M., SHIPLEY H.V., RANA V.R., BARRETT P.E. and SINGH K.P.

Abstract (from CDS):

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/cm3. We demonstrate that much of the plasma is in a nonequilibrium state; the Fe emission, however, may arise from plasma in the ionization equilibrium.

Abstract Copyright:

Journal keyword(s): novae, cataclysmic variables - stars: dwarf novae - X-rays: binaries

Simbad objects: 21

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