The ultraviolet spectrum of the high-field magnetic cataclysmic variable AR Ursae Majoris
UNSPECIFIED (2004) The ultraviolet spectrum of the high-field magnetic cataclysmic variable AR Ursae Majoris. ASTRONOMICAL JOURNAL, 128 (4). pp. 1894-1898. ISSN 0004-6256Full text not available from this repository.
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|
|Number of Pages:||5|
|Page Range:||pp. 1894-1898|
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