Anticorrelated Hard X‐Ray Time Lag in GRS 1915+105: Evidence for a Truncated Accretion Disk
| Autor: | Manojendu Choudhury, V. K. Agrawal, Kandulapati Sriram, Surajit Dasgupta, A. R. Rao, Jayant K. Pendharkar |
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| Rok vydání: | 2005 |
| Předmět: |
Physics
Jet (fluid) Superluminal motion Astrophysics::High Energy Astrophysical Phenomena Astrophysics (astro-ph) X-ray FOS: Physical sciences Time lag Astronomy and Astrophysics Radius Astrophysics Black hole Accretion disc Space and Planetary Science Truncation (statistics) Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astrophysical Journal. 631:1072-1081 |
| ISSN: | 1538-4357 0004-637X |
| Popis: | 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. Accepted in ApJ: (to appear on 1 Oct, 2005 issue) |
| Databáze: | OpenAIRE |
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