Detection of cyclotron emission features in the infrared spectrum of ST LMi

Details Detection of cyclotron emission features in the infrared spectrum of ST LMi Detection of cyclotron emission features in the infrared spectrum of ST LMi

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262..285f&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 2, p. 285-288.

Astronomy and Astrophysics

Astronomy

25

Cataclysmic Variables, Cyclotron Radiation, Infrared Spectra, Stellar Radiation, Stellar Spectrophotometry, Near Infrared Radiation, Stellar Magnetic Fields, White Dwarf Stars

Scientific paper

We present near-infrared spectroscopic observations of the AM Herculis system ST LMi over the wavelength range 1.0-2.5 microns. During the bright phase of the binary cycle, broad and resolvable cyclotron emission harmonics are visible near 1.42, 1.65 and 2.0 microns. We have interpreted the features in terms of an arc-shaped cyclotron emission region consisting of a high-density, high-temperature spot with an extended leading edge of cooler and lower density material. The accretion arc is located close to the weaker pole of magnetic field strength of about 12 MG.

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