B. T. Gänsicke et al 2004 ApJ 613 L141 doi:10.1086/425141
A 150 MG Magnetic White Dwarf in the Cataclysmic Variable RX J1554.2+2721*
FREEB. T. Gänsicke1, S. Jordan2, K. Beuermann3, D. de Martino4, P. Szkody5, T. R. Marsh1 and J. Thorstensen6
Show affiliationsWe report the detection of Zeeman-split Lyα absorption π and σ+ 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 
144 MG and an effective temperature of 17,000 K 
Teff 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.
- Footnote
- Subject headings
line: formation; novae, cataclysmic variables; stars: individual (RX J1554.2+2721); stars: magnetic fields; white dwarfs
- Dates
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Issue 2 (2004 October 1)
Received 2004 July 17, accepted for publication 2004 August 16
Published 2004 September 3
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A 150 MG Magnetic White Dwarf in the Cataclysmic Variable RX J1554.2+2721
B. T. Gänsicke et al 2004 ApJ 613 L141
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