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A 150 MG magnetic white dwarf in the cataclysmic variable RX J1554.2+2721
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UNSPECIFIED (2004) A 150 MG magnetic white dwarf in the cataclysmic variable RX J1554.2+2721. ASTROPHYSICAL JOURNAL, 613 (2 Part 2). L141-L144. ISSN 0004-637X.
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Abstract
We report the detection of Zeeman-split Lyalpha absorption pi and sigma(+) lines in the far-ultraviolet Hubble Space Telescope/Space Telescope Imaging Spectrograph (STIS) spectrum of the magnetic cataclysmic variable RX J1554.2 + 2721. Fitting the STIS data with magnetic white dwarf model spectra, we derive a field strength of B similar or equal to 144 MG and an effective temperature of 17,000 K less than or similar to T-eff less than or similar to 23,000 K. This measurement makes RX J1554.2 + 2721 only the third cataclysmic variable containing a white dwarf with a field exceeding 100 MG. Similar to the other high-field polar AR UMa, RX J1554.2 + 2721 is often found in a state of feeble mass transfer, which suggests that a considerable number of high-field polars may still remain undiscovered.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QB Astronomy | ||||
Journal or Publication Title: | ASTROPHYSICAL JOURNAL | ||||
Publisher: | UNIV CHICAGO PRESS | ||||
ISSN: | 0004-637X | ||||
Official Date: | 1 October 2004 | ||||
Dates: |
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Volume: | 613 | ||||
Number: | 2 Part 2 | ||||
Number of Pages: | 4 | ||||
Page Range: | L141-L144 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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