Dust in Intermediate Polars: Light Curves from the Spitzer Space Telescope

Details Dust in Intermediate Polars: Light Curves from the Spitzer Space Telescope Dust in Intermediate Polars: Light Curves from the Spitzer Space Telescope

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541617b&link_type=abstract

American Astronomical Society, AAS Meeting #215, #416.17; Bulletin of the American Astronomical Society, Vol. 42, p.269

Astronomy and Astrophysics

Astronomy

Scientific paper

Our recent observations of cataclysmic variables (CVs) with the Spitzer Space Telescope (cycles 2 and 4) have identified two modes of "dustiness": non-magnetic CVs have a large reservoir of dust located inside the binary, just beyond the outer edge of the optically visible accretion disk, while magnetic CVs have dust located outside of the binary. These results motivated us to add intermediate polars (IPs) to the list of CVs observed with Spitzer. Possessing both an accretion disk and magnetically controlled accretion, IPs display observational characteristics of both non-magnetic and magnetic CVs. As dust has been linked to CV evolution, dust properties of IPs will allow us to have a more complete picture of CV evolution, and also allow us to understand where IPs fit into the evolutionary scenario of CVs.
Here we present Spitzer 4.5 um light curves of three IPs - DQ Her, EX Hya, XY Ari - obtained with Cycle 6 observations. We compare these results with our previous observations of magnetic and non-magnetic systems and discuss the implications for the current CV evolution paradigm.

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