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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 | Affiliation: | National 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 | Abstract: | Multi-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 | Services: | Forum | Review | PDF | Favorites |
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