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Simulating AXAF Grating Spectra of Accreting White Dwarfs

Published online by Cambridge University Press:  05 March 2013

Allyn F. Tennant ,
Kinwah Wu ,
Stephen L. O'Dell  and
Martin C. Weisskopf
Allyn F. Tennant
Affiliation:
ES-84 Space Science Laboratory, NASA Marshall Space Flight Center, Huntsville, AL 35812, USA; [email protected]
Kinwah Wu
Affiliation:
Research Centre for Theoretical Astrophysics, School of Physics, University of Sydney, NSW 2006, Australia; [email protected]
Stephen L. O'Dell
Affiliation:
ES-84 Space Science Laboratory, NASA Marshall Space Flight Center, Huntsville, AL 35812, USA; [email protected]
Martin C. Weisskopf
Affiliation:
ES-01 Space Science Laboratory, NASA Marshall Space Flight Center, Huntsville, AL 35812, USA; [email protected]
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Abstract

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We present simulated AXAF spectra of accreting white dwarfs, using parameters appropriate for magnetic cataclysmic variables. The very high spectral resolution that can be obtained with the High-Energy Transmission Grating of AXAF can resolve the keV X-ray emission lines that characterise the temperature, density and velocity profiles of the shock-heated emission regions of these systems. These simulations demonstrate that actual spectra will allow us to place constraints on the white-dwarf mass and the accretion rate of the systems. The high-resolution spectra also allow the measurement of the velocity of the accretion flow in regions close to the white-dwarf surface.

Keywords

accretionstars: binaries: closestars: white dwarfsdata analysis
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 15 , Issue 3 , 1998 , pp. 339 - 347
Copyright
Copyright © Astronomical Society of Australia 1998

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