Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.1514c&link_type=abstract
American Astronomical Society, AAS Meeting #211, #15.14; Bulletin of the American Astronomical Society, Vol. 39, p.766
Astronomy and Astrophysics
Astronomy
Scientific paper
We present phase-resloved( 0.1 phase intervals) cyclotron spectrocopy of five polars(AN UMa, EF Eri, VV Pup, and EQ Cet, and MQ Dra) obtained with SPEX on the IRTF as well as Apache Point Observatory. SPEX covers the I, J, H, and K bands simultaneously allowing for great wavelength coverage of all the observed systems. For each object, a Constant Lambda (CL) code was run to compute model cyclotron spectra which were fit to the data observed by altering four parameters: B, the magnetic field strength, T, the global temperature of the plasma in the accretion region, Lambda, the "size parameter" of the accretion column, and Theta, the viewing angle. To allow for more physical setup in the accretion regions in question, we will soon transition to a structured-shock code based on Fischer and Beuermann (2001), which allows the effects of variable mass accretion and magnetic fields to be included.
Campbell Ryan
Harrison Thomas E.
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