منابع مشابه
Rapidly Evolving Circularly Polarized Emission during the 1994 Outburst of GRO J1655-40
We report the detection of circular polarization during the 1994 outburst of the Galactic microquasar GRO J1655−40. The circular polarization is clearly detected at 1.4 and 2.4 GHz, but not at 4.8 and 8.4 GHz, where its magnitude never exceeds 5 mJy. Both the sign and magnitude of the circular polarization evolve during the outburst. The time dependence and magnitude of the polarized emission c...
متن کاملComptel 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 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 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 کاملWind, jet, hybrid corona and hard X-ray flares: multiwavelength evolution of GRO J1655−40 during the 2005 outburst rise
We have investigated the complex multiwavelength evolution of GRO J1655−40 during the rise of its 2005 outburst. We detected two hard X-ray flares, the first one during the transition from the soft state to the ultra-soft state, and the second one in the ultra-soft state. The first X-ray flare coincided with an optically thin radio flare. We also observed a hint of increased radio emission duri...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1996
ISSN: 0074-1809
DOI: 10.1017/s0074180900055832