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29 March 2024
 
  » arxiv » astro-ph/0506325

 Article overview


Anti-correlated hard X-ray time lag in GRS 1915+105: evidence for a truncated accretion disc
Manojendu Choudhury ; A. R.Rao ; Surajit Dasgupta ; J. Pendharkar ; K. Sriram ; V. K. Agrawal ;
Date 14 Jun 2005
Subject astro-ph
AffiliationNational Centre for Radio Astrophysics, T.I.F.R., Pune. India), A. R.Rao, Surajit Dasgupta (T.I.F.R., Mumbai. India), J. Pendharkar, K. Sriram (Osmania University, Hyderabad, India), V. K. Agrawal (I.U.C.A.A., Pune. India
AbstractMulti-wavelength observations of Galactic black hole candidate sources indicate a close connection between the accretion disk emission and the jet emission. The recent discovery of an anti-correlated time lag between the soft and hard X-rays in Cygnus X-3 (Choudhury & Rao 2004) constrains the geometric picture of the disk-jet connection into a truncated accretion disk, the truncation radius being quite close to the black hole. Here we report the detection of similar anti-correlated time lag in the superluminal jet source GRS 1915+105. We show the existence of the pivoting in the X-ray spectrum during the delayed anti-correlation and we also find that the QPO parameters change along with the spectral pivoting. We explore theoretical models to understand this phenomenon.
Source arXiv, astro-ph/0506325
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