Stellar Accretion and X-Ray Source
نویسندگان
چکیده
منابع مشابه
X-ray Spectroscopy of Accretion Disks and Stellar Winds in X-Ray Binaries
From hot, tenuous gas dominated by Compton processes, to warm, photoionized emission-line regions, to cold, optically thick fluorescing matter, accreting gas flows in X-ray binaries span a huge portion of the parameter space accessible to astrophysical plasmas. The coexistence of such diverse states of material within small volumes (10–10 cm) leaves X-ray spectroscopists with a challenging set ...
متن کاملStellar 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 کاملStellar X-Ray surveys and Galaxy structure
Soft X-ray surveys are very effective to study low-mass stellar populations in our Galaxy. Indeed stellar X-ray counts well complement optical stellar counts since they allow us to study spatial distributions and densities of main sequence stars as function of age. This capability is due to the strong dependence of X-ray luminosity on stellar age, especially during the main sequence life. As a ...
متن کاملA Stellar-mass Black Hole in the Ultra-luminous X-ray Source M82 X-1?
We have analyzed the archival XMM-Newton data of the bright UltraLuminous X-ray Source (ULX) M82 X-1 with an 105 ksec exposure when the source was in the steady state. Thanks to the high photon statistics from the large effective area and long exposure, we were able to discriminate different X-ray continuum spectral models. Neither the standard accretion disk model (where the radial dependency ...
متن کاملAccretion Rates in X–ray Bursting Sources
We present estimates for the accretion rates in 13 X–ray bursting sources which exhibit photospheric expansion, basing on theoretical models of stationary, radiatively driven winds from neutron stars. The relatively high values obtained, Ṁacc∼> 10 M⊙/yr, are in accordance with theoretical limits for unstable helium burning, and, at the same time, almost never exceed the “dynamical” limit for st...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1968
ISSN: 0033-068X
DOI: 10.1143/ptp.39.235