On the abundances of GRO J1655-40
نویسندگان
چکیده
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 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 کاملOptical and Infrared Photometry of the Micro-quasar GRO J1655-40 in Quiescence
We present BV IJK photometry of the black–hole candidate GRO J1655–40 in full quiescence. We report a refined orbital period of 2.62191 ± 0.00020 days. The light curves are dominated by ellipsoidal variations from the secondary star. We model the light curves with an upgraded code which includes a more accurate treatment of limb darkening. Previous models containing a large cool disk are ruled ...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2007
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20077106