An archival study of extended X-ray emission from classical and recurrent novae |
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Authors: | len Balman |
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Institution: | aMiddle East Technical University, Department of Physics, Inönü Bulvarı, Ankara 06531, Turkey |
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Abstract: | I discuss morphology and spectrum of the first resolved and detected classical nova shell in the X-rays – the remnant of GK Persei (1901). The existence of such a nebulosity brings about the possibility of other nova remnants emitting X-rays. I calculate that the X-ray luminosity should be about 1026–1033 ergs s−1 on the onset of cooling for nova remnants. I have done an archival search on 250 classical and recurrent nova candidates using Chandra, XMM-Newton, ROSAT and ASCA databases. There is no significant extended emission detected which places an upper limit of Fx < × 10−12 erg s−1 cm−2 (unabsorbed). Only exceptions are GK Per, RR Pic and DQ Her (all observed by Chandra ACIS-S and GK Per also by ROSAT HRI) where the latter two show marginal extended emission in the X-rays associated with emission knots (DQ Her) or an equatorial ring (RR Pic). |
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Keywords: | X-rays Stars Radiation mechanisms Thermal Non-thermal Binaries Close Novae Cataclysmic variables Supernova remnants |
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