On the relation between supersoft X-ray sources and VY Scl stars: The cases of V504 Cen and VY Scl
نویسندگان
چکیده
منابع مشابه
The X-ray Spectra of VY Scl Stars Are Not Blackbodies
Using ASCA data, we find, contrary to other researchers using ROSAT data, that the X-ray spectra of the VY Scl stars TT Ari and KR Aur are poorly fit by an absorbed blackbody model but are well fit by an absorbed thermal plasma model. The different conclusions about the nature of the X-ray spectrum of KR Aur may be due to differences in the accretion rate, since this star was in a high optical ...
متن کاملSoft X-ray emission of VY Scl stars during optical high state
I have collected all available ROSAT observations of VY Scl stars including those during the all-sky survey to investigate the presence, strength and spectrum of soft X-ray emission (0.1–2.4 keV) of this group of novalike variables. A total of 9 out of the 14 VY Scl stars are detected with ROSAT, mostly during optical high states. Interestingly, all detections during the optical high state have...
متن کاملar X iv : a st ro - p h / 98 10 01 9 v 1 1 O ct 1 99 8 Relation between Supersoft X - ray sources and VY Scl stars
In a recent ROSAT observation, taken during its optical low state, we found that the VY Scl star V751 Cyg was a highly luminous source of soft X-rays. The ROSAT HRI count rate of V751 Cyg was a factor of 10–20 higher than upper limits obtained with ROSAT during previous observations, during which V751 Cyg happened to be in the optical high state. Analysis of the X-ray spectrum suggests a very l...
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ژورنال
عنوان ژورنال: Astronomische Nachrichten
سال: 2010
ISSN: 0004-6337,1521-3994
DOI: 10.1002/asna.200911332