Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.4411m&link_type=abstract
American Astronomical Society Meeting 203, #44.11; Bulletin of the American Astronomical Society, Vol. 35, p.1276
Astronomy and Astrophysics
Astronomy
Scientific paper
In the optical and ultraviolet regions of the electromagnetic spectrum, UX Ursae Majoris is a deeply eclipsing cataclysmic variable. However, it has shown no soft X-ray eclipse in ROSAT observations. We have obtained a 50 ksec XMM-Newton observation to further constrain the origin of the X-rays. We find two components in the X-ray emission of UX UMa. The soft component, dominant below photon energy of 2 keV, can be fit with a multi-temperature plasma model and is uneclipsed. The hard component, dominant above 3 keV, can be fit with a kT ˜5 keV plasma model and appears to be deeply eclipsed. We consider the possible origins of these components.
Hassall B. J. M.
Mukai Kazuhiko
Naylor Tim
Pratt Gabriel W.
Wood Janet H.
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