Stellar wind accretion in GX 301−2: evidence for a high-density stream
نویسندگان
چکیده
منابع مشابه
Stellar wind accretion in high-mass X-ray binaries
Recent discoveries have confirmed the existence of a large population of Xray sources fuelled by accretion from the stellar wind of an OB supergiant. Such systems are powerful laboratories to study many aspects of astrophysics. Over the last decades, the physics of accretion in these systems has been the subject of extensive research, mainly through numerical methods. In spite of this effort, l...
متن کاملHydrodynamical interaction between an accretion flow and a stellar wind
Molecular clouds in the interstellar medium suffer gravitational instabilities that lead to the formation of one or multiple stars. A recently formed star inside a cold cloud communicates its gravitational force to the surrounding environment and soon an accretion flow falling into the star develops. After their formation, all stars soon eject a wind of gas that interacts with the external accr...
متن کاملWind Accretion by a Binary Stellar System and Disk Formation
I calculate the specific angular momentum of mass accreted by a binary system embedded in the dense wind of a mass losing asymptotic giant branch star. The accretion flow is of the Bondi-Hoyle-Lyttleton type. For most of the relevant parameters space the flow is basically an isothermal high Mach number accretion flow. I find that when the orbital plane of the accreting binary system and the orb...
متن کاملAccretion Column Disruption in Gx 1+4
Daily observations of the binary X-ray pulsar GX 1+4 were made with the Rossi Xray Timing Explorer (RXTE ) satellite between 1997 May 16–20 as part of a four-month monitoring program. On May 17 the sharp dips normally observed in the lightcurve were all but absent, resulting in a pulse fraction fp ≈ 0.5 instead of the more typical value of ≈ 0.8 measured before and after. Also observed was a dr...
متن کاملEvidence for an accretion stream in 4 U 1907 + 09
The X-ray binary system 4U 1907+09 contains an accretion-powered X-ray pulsar in an eccentric orbit around a massive early-type companion star. It has been previously suggested that a trailing gas stream along with strong stellar winds could describe the orbital variations in X-ray flux. In this work, 12 yr of X-ray observations from the Rossi X-ray Timing Explorer/ All-Sky Monitor are analysed...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2008
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2007.12754.x