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The ultraviolet spectrum of the high-field magnetic cataclysmic variable AR Ursae Majoris
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UNSPECIFIED (2004) The ultraviolet spectrum of the high-field magnetic cataclysmic variable AR Ursae Majoris. ASTRONOMICAL JOURNAL, 128 (4). pp. 1894-1898. ISSN 0004-6256
Full text not available from this repository.Abstract
We have obtained an ultraviolet spectrum covering the range 917 - 1182 Angstrom of the high-field magnetic cataclysmic variable AR Ursae Majoris when the binary was in its typical low-accretion state. The data reveal an array of deep Zeeman absorption features due to hydrogen Lyalpha-Lygamma, including several transitions that are normally forbidden but become enabled in the strong electric fields that exist in the atmospheres of highly magnetic white dwarfs. Spectral models indicate a magnetic field strength and structure consistent with that determined from longer wavelength Hubble Space Telescope Space Telescope Imaging Spectrograph UV observations; that is, a dipole of strength similar to 235 MG offset along its axis by similar to 0.15 of the stellar radius.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QB Astronomy |
| Journal or Publication Title: | ASTRONOMICAL JOURNAL |
| Publisher: | UNIV CHICAGO PRESS |
| ISSN: | 0004-6256 |
| Date: | October 2004 |
| Volume: | 128 |
| Number: | 4 |
| Number of Pages: | 5 |
| Page Range: | pp. 1894-1898 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/7973 |
Data sourced from Thomson Reuters' Web of Knowledge
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