First Spitzer Space Telescope Observations of Magnetic Cataclysmic Variables: Evidence of Excess Emission at 3-8 μm

  title={First Spitzer Space Telescope Observations of Magnetic Cataclysmic Variables: Evidence of Excess Emission at 3-8 $\mu$m},
  author={Steve B. Howell and Carolyn Brinkworth and Donald Wayne Hoard and Stefanie Wachter and Thomas E. Harrison and Howard Chun and Beth Thomas and Linda Stefaniak and David R. Ciardi and Paula Szkody and Gerard T. van Belle},
  journal={The Astrophysical Journal Letters},
  pages={L65 - L68}
We present the first observations of magnetic cataclysmic variables using the Spitzer Space Telescope. We used the Infrared Array Camera to obtain photometry of the Polars EF Eri, GG Leo, V347 Pav, and RX J0154.0-5947 at 3.6, 4.5, 5.8, and 8.0 μm, respectively. In all of our targets, we detect excess mid-infrared emission over that expected from the component stars alone. We explore the origin of this IR excess by examining bremsstrahlung, cyclotron emission, circumbinary dust, and L/T brown… 

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