Properties Of The Low-state Satellite Emission Lines In Magnetic Cataclysmic Variables

Details Properties Of The Low-state Satellite Emission Lines In Magnetic Cataclysmic Variables Properties Of The Low-state Satellite Emission Lines In Magnetic Cataclysmic Variables

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541616k&link_type=abstract

American Astronomical Society, AAS Meeting #215, #416.16; Bulletin of the American Astronomical Society, Vol. 42, p.268

Astronomy and Astrophysics

Astronomy

Scientific paper

Chromspheric activity on the low mass, low main sequence donor star in cataclysmic variables (CVs) is commonly invoked to explain sustained mass transfer caused by system angular momentum loss via a magnetized stellar wind. Such activity may also be responsible for the CV period gap, and for the widely differing mass transfer rates among CVs at the same orbital period. We present a spectroscopic monitoring campaign of a number of magnetic CVs at times of reduced accretion, where unusual components in the H-alpha line reveal magnetically confined gas motions in large, long-lived loop prominence-like structures on the donor star. We discuss possible mechanisms leading to those structures which may reveal a new paradigm on magnetic activity in magnetic CVs.

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