Mystery of strong iron lines from magnetic cataclysmic variables

Details Mystery of strong iron lines from magnetic cataclysmic variables Mystery of strong iron lines from magnetic cataclysmic variables

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002asthe..95..581t&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 95, No. 12, p. 581 - 588 (2002)

Other

Cataclysmic Variables, Iron Lines

Scientific paper

Extremely strong ionized iron emission lines were discovered with ASCA from a few Galactic objects. They are thought to be polar systems, or binary systems containing magnetic white dwarfs. We think the line intensities of these objects are unphysical, because they are 2 or 3 times higher than those of other polars. In other words, we consider that the iron line emission may be somehow enhanced by an unknown yet universal mechanism, rather than that indicating a truly high metallicity of those systems. In this paper, we propose a new possible interpretation that the iron line is collimated in the accretion plasma due to resonance scattering, and demonstrate the solution of the mystery.

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