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We investigate the association between the accretion disk during radio plateau state and the following superluminal relativistic radio jets with peak intensity varies from 200 mJy to 1000 mJy observed over a period of five years and present…

天体物理学 · 物理学 2009-11-11 J. S. Yadav

GRS1915+105 is a very peculiar black hole binary that exhibits accretion-related states that are not observed in any other stellar-mass black hole system. One of these states, however -- referred to as the plateau state -- may be related to…

We have compared simultaneous Ryle Telescope radio and Rossi X-Ray Timing Explorer X-ray observations of the galactic microquasar GRS 1915+105, using the classification of the X-ray behaviour in terms of three states as previously…

天体物理学 · 物理学 2009-11-07 M. Klein-Wolt , R. P. Fender , G. G. Pooley , T. Belloni , S. Migliari , E. H. Morgan , M. van der Klis

We combine a complete sample of 113 pointed observations taken with the Rossi X-ray Timing Explorer between 1996-1999, monitoring observations taken with the Ryle telescope and the Green Bank Interferometer, and selected observations with…

天体物理学 · 物理学 2009-11-06 M. P. Muno , R. A. Remillard , E. H. Morgan , E. B. Waltman , V. Dhawan , R. M. Hjellming , G. Pooley

Radio emission from X-ray binary systems (XRBs) has developed in recent years from being peculiar phenomenon to being recognised as an ubiquitous property of several classes of XRBs. In this scenario the synchrotron emission is interpreted…

天体物理学 · 物理学 2007-05-23 E. Gallo , R. Fender , G. Pooley

We have compared simultaneous Ryle Telescope (RT) radio and Rossi X-Ray Timing Explorer (RXTE) X-ray observations of the galactic microquasar GRS 1915+105. We find that radio emission, and therefore also the radio jet, requires the presence…

天体物理学 · 物理学 2007-05-23 M. Klein-Wolt , R. P. Fender , G. G. Pooley , T. Belloni , S. Migliari , E. H. Morgan , M. van der Klis

In recent years, much effort has been devoted to unraveling the connection between the accretion flow and the jets in accreting compact objects. In the present work, we report new constraints on these issues, through the long term study of…

高能天体物理现象 · 物理学 2015-05-27 M. Coriat , S. Corbel , L. Prat , J. C. A. Miller-Jones , D. Cseh , A. K. Tzioumis , C. Brocksopp , J. Rodriguez , R. P. Fender , G. R. Sivakoff

We investigate the association between the radio ``plateau'' states and the large superluminal flares in GRS 1915+105 and propose a qualitative scenario to explain this association. We identify several candidate superluminal flare events…

天体物理学 · 物理学 2009-11-10 S. V. Vadawale , A. R. Rao , S. Naik , J. S. Yadav , C. H. Ishwara-Chandra , A. Pramesh Rao , G. G. Pooley

We present the results of a long-term study of the black hole candidate GX 339-4 using simultaneous radio (from the Australia Telescope Compact Array) and X-ray (from the Rossi X-ray Timing Explorer and BeppoSAX) observations performed…

天体物理学 · 物理学 2008-11-26 S. Corbel , M. A. Nowak , R. P. Fender , A. K. Tzioumis , S. Markoff

We present the results from simultaneous radio (Very Large Array) and X-ray (Rossi-X-ray Timing Explorer) observations of the Z-type neutron star X-ray binary GX~17+2. The aim is to assess the coupling between X-ray and radio properties…

A tight correlation between the radio and X-ray emission in the hard state of black hole X-ray binaries (BHXRBs) indicates an intrinsic disc-jet connection in stellar black hole accretion systems, though the detailed physics processes at…

高能天体物理现象 · 物理学 2024-08-21 Yiheng Jiang , Shanshan Li , Xinwu Cao , Bei You , Andrzej A. Zdziarski , Saien Xu

We present results of our study of correlated radio and X-ray emission in two black hole candidates and Galactic microquasars GRS 1915+105 and Cygnus X-1 in their steady long term hard states, along with Cygnus X-3 (using data obtained from…

天体物理学 · 物理学 2009-11-07 M. Choudhury , A. R. Rao , S. V. Vadawale , A. K. Jain

In this paper we study the relation of radio emission to X-ray spectral and variability properties for a large sample of black hole X-ray binary systems. This is done to test, refine and extend -- notably into the timing properties -- the…

高能天体物理现象 · 物理学 2015-05-13 R. P. Fender , J. Homan , T. M. Belloni

We present a comprehensive study of (quasi-)simultaneous radio:X-ray observations of stellar black hole binaries during the spectrally hard X-ray state, finding evidence for a strong correlation between these two bands over more than three…

天体物理学 · 物理学 2011-05-05 Elena Gallo , Rob Fender , Guy Pooley

In this article, models are constructed of the compact jet in GRS 1915+105 during an epoch of optimal data capture. On April 02, 2003, the object was observed in the hard X-ray/soft gamma ray band (INTEGRAL), hard X-ray band (RXTE), near IR…

高能天体物理现象 · 物理学 2015-05-30 Brian Punsly

The Galactic black hole transient GRS1915+105 is famous for its markedly variable X-ray and radio behaviour, and for being the archetypal galactic source of relativistic jets. It entered an X-ray outburst in 1992 and has been active ever…

GRS 1915+105 is a transient black hole X-ray binary consistently emitting 10-100% of the Eddington luminosity in the X-ray band during the last three decades until mid-2018 when the source luminosity suddenly decreased by an order of…

高能天体物理现象 · 物理学 2021-04-07 Karri I. I. Koljonen , Talvikki Hovatta

Recently a correlation between the radio and X-ray luminosities is found, $L_{\rm R}\propto L_{\rm X}^{0.7}$, in black hole sources including black hole candidates in our galaxy and active galactic nuclei. We first show that the correlation…

天体物理学 · 物理学 2009-11-10 Feng Yuan , Wei Cui

We present evidence of a direct accretion disk-jet connection in the Galactic microquasar GRS 1915+105 based on our analysis of RXTE/PCA data with a ``spike'' in X-ray light curves. We find that the radio emission increases as the hardness…

天体物理学 · 物理学 2009-10-31 J. S. Yadav

We have studied the accretion disk during the radio plateau state and the following superluminal relativistic radio jets and have provided a tight correlation between accretion disk and superluminal jet parameters. We find that accretion…

天体物理学 · 物理学 2008-11-26 J S Yadav
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