Photometry and polarimetry of AM Herculis in its faint state

Details Photometry and polarimetry of AM Herculis in its faint state Photometry and polarimetry of AM Herculis in its faint state

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988mnras.233..395b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 233, July 15, 1988, p. 395-403.

Astronomy and Astrophysics

Astronomy

31

Binary Stars, Light Curve, Photosphere, Polarimetry, Stellar Spectrophotometry, Circular Polarization, Infrared Photometry, Particle Flux Density

Scientific paper

Infrared and optical photometry and polarimetry of AM Herculis during the faint state of its long-term light variations are presented. The contributions of the two stellar photospheres are estimated and the distance of the system derived. The observations show very little polarized cyclotron radiation in the optical, but still show substantial polarization in the near-infrared. The cyclotron flux has dropped by a factor of about 12 from the normal bright state. The change in the cyclotron spectrum can be understood if the column density of electrons in the emitting region has dropped by a factor of about 103 with the area and temperature remaining the same.

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