Low-state Magnetic Structures in Polars: Nature or Nurture?
Abstract
We present an orbit-resolved study of the magnetic cataclysmic variable (MCV) BL Hyi in its low state, and we explore the origin of its Hα emission line components, their properties, and their possible formation mechanism. We tentatively associate one of the line components with a high-velocity component also seen in the high state. We propose a scenario in which streaming prominence-like magnetic loops (super-prominences) are kept in place by magnetic field interactions between the white dwarf and the donor star and are responsible for the high-velocity line components in the Balmer lines. We also discuss how this is in accord with the standard scenario of the secular evolution for MCVs. Finally, we offer an observational test of our ideas and present challenges for future theoretical studies.
Additional Information
© 2010 The American Astronomical Society. Received 2010 March 8; accepted 2010 July 17; published 2010 September 14.Attached Files
Published - Kafka2010p11595Astrophys_J.pdf
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Additional details
- Eprint ID
- 20488
- Resolver ID
- CaltechAUTHORS:20101022-142644101
- Created
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2010-11-12Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field