Hoard, D. W. and Kafka, S. and Wachter, S. and Howell, S. and Brinkworth, C. and Ciardi, D. and Szkody, P. (2009) What’s Cool About Hot Stars? Cataclysmic Variables in the Mid-Infrared. In: The Eighth Pacific Rim Conference on Stellar Astrophysics: A Tribute to Kam Ching Leung. ASP Conference Series (404). Astronomical Society of the Pacific , San Francisco, pp. 234-240. ISBN 978-1-58381-685-1 http://resolver.caltech.edu/CaltechAUTHORS:20100510-121200634
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We review recent results from mid-infrared observations of cataclysmic variables with the Spitzer Space Telescope. In general, these observations have revealed mid-infrared excesses, above the level expected from the stellar and accretion components, in numerous systems. This excess can be modeled as originating from circumstellar and/or circumbinary dust. We present an overview of spectral energy distributions spanning the ultraviolet to the mid-infrared, as well as mid-infrared light curves, of disk-accreting and magnetic cataclysmic variables. Physically realistic models constructed to reproduce these data indicate that the mid-infrared luminosity of many cataclysmic variables is dominated by emission from warm (T < 2000 K) dust. The presence and characteristics of dust in cataclysmic variables has potentially important implications for the secular evolution scenario for interacting binary stars.
|Item Type:||Book Section|
|Additional Information:||© 2009 Astronomical Society of the Pacific.|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||24 Jun 2010 18:59|
|Last Modified:||26 Dec 2012 12:01|
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