Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...439..991h&link_type=abstract
The Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 439, no. 2, p. 991-995
Astronomy and Astrophysics
Astronomy
20
Accretion Disks, Asymmetry, Cataclysmic Variables, Magnetic Effects, Stellar Mass Accretion, Ultraviolet Astronomy, White Dwarf Stars, Data Reduction, Extreme Ultraviolet Explorer Satellite, Light Curve, Orbital Elements, Spectrographs, Ultraviolet Photometry
Scientific paper
We present the first detailed extreme photometric observations of a magnetic cataclysmic variable. Our two Extreme Ultraviolet Explorer (EUVE) observations of the AM Her star RE 1149 + 28 were obtained about 1 yr apart and show light-curve variations on orbital to yearly timescales, as well as long-term mean flux level changes of a factor of 2. The photometric data show a persistent ingress EUV enhancement which lasts approximately 0.04 in phase. We attribute this to a region of approximately 103 km in extent at the accretion impact site, on or very near the surface of the white dwarf primary. Our observations of RE 1149 are consistent with a relatively low system inclination and provide a best-fit orbital period of 90.14 +/- 0.015 minutes.
Howell Steve B.
Malina Roger F.
Mason Keith O.
Mittaz Jon P. D.
Sirk Martin M.
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