منابع مشابه
Comptel Observations of Gro J1655-40
GRO J1655-40 is a transient black-hole candidate that has been shown to eject matter at apparently superluminal velocities. OSSE spectra measured during X-ray outbursts are consistent with a single power law up to 600 keV, with no evidence for a high-energy cutoo. Flaring behaviour of GRO J1655-40 has also been claimed to be detected up to 10 MeV during observations with the balloon-borne HIREG...
متن کاملA Super-Eddington Wind Model for GRO J1655-40
A model for GROJ1655-40 is described in which the hard X/~-ray behavior, and long delay between the X/~ and radio outbursts, are explained by processes which occur when the accretion rate approaches and exceeds the Eddington limit. The principal feature of the model is a dense, optically thick, super-Eddington wind ejected from the center of the accretion disk. The wind is responsible for deter...
متن کاملOn the distance of GRO J 1655 - 40 ⋆
Aims. We challenge the accepted distance of 3.2 kpc of GRO J1655-40. We present VLT-UVES spectroscopic observations to estimate the absorption toward the source, and determine a maximum distance of GRO J1655-40. Methods. We show that the accepted value of 3.2 kpc is taken for granted by many authors. We retrieved in the ESO archive UVES spectra taken in April 2004 when GRO J1655-40 was in quies...
متن کاملThe Transient Nature of Gro J1655-40 and Its Evolutionary State
We consider the evolutionary state of the black–hole X–ray source GRO J1655–40 in the context of its transient nature. Recent optical observations show that the donor in GRO J1655–40 is an intermediate–mass star (≃ 2.3M⊙) crossing the Hertzsprung gap. Usually in such systems the donor’s radius expansion drives a near-Eddington or super–Eddington mass transfer rate which would sustain a persiste...
متن کاملAND ASTROPHYSICS The radio surroundings of the microquasar GRO J1655−40
We report the results of a study of the radio surroundings of the superluminal microquasar GRO J1655−40. We have searched for extended continuum structures that might be indicative of the presence of a supernova remnant (SNR) associated with the formation of the compact object in the binary system. We also carried out HI-line observations of the region looking for a local minimum created by an ...
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: Astronomy & Astrophysics
سال: 2006
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20054686