A MODEL OF WHITE DWARF PULSAR AR SCORPII
Journal Article
·
· Astrophysical Journal Letters
- School of Astronomy and Space Science, Nanjing University, Nanjing 210046 (China)
- Department of Physics and Astronomy, University of Nevada Las Vegas, NV 89154 (United States)
A 3.56 hr white dwarf (WD)–M dwarf (MD) close binary system, AR Scorpii, was recently reported to show pulsating emission in radio, IR, optical, and UV, with a 1.97 minute period, which suggests the existence of a WD with a rotation period of 1.95 minutes. We propose a model to explain the temporal and spectral characteristics of the system. The WD is a nearly perpendicular rotator, with both open field line beams sweeping the MD stellar wind periodically. A bow shock propagating into the stellar wind accelerates electrons in the wind. Synchrotron radiation of these shocked electrons can naturally account for the broadband (from radio to X-rays) spectral energy distribution of the system.
- OSTI ID:
- 22654166
- Journal Information:
- Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 831; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
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