Evidence for a relativistic iron line in GRS 1915+105

2002/03/12 by A. Martocchia, G. Matt, V. Karas +2 · 5 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics and Star Formation Studies #astro-ph

paper · pdf · doi:10.1051/0004-6361:20020359

published as Astron.Astrophys. 387 (2002) 215-221 · 7 pages, accepted for publication on A&A

arxiv created 2002/03/12 · openalex publication_date 2002/05/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report on the discovery of a relativistic iron Kα fluorescent emission line in the BeppoSAX spectrum of the microquasar GRS 1915+105, taken on April 19, 1998, when the line was unusually intense. The feature is broad and skewed, clearly indicating emission from the innermost regions of the accretion disc. The inner emitting orbit is larger than the innermost stable orbit, even in Schwarzschild metric: thus, a non-zero BH spin is not required by these data.

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• The onset of General Relativity: gravitationally redshifted emission lines
• Magnetic fields in active galactic nuclei and microquasars
• A Relativistic F[CLC]e[/CLC] Kα Emission Line in the Intermediate-Luminosity [ITAL]B[CLC]eppo[/CLC]SAX[/ITAL] Spectrum of the Galactic Microquasar V4641 Sgr
• The XMM-Newtonview of GRS 1915+105
• EXTREMAL ENERGY SHIFTS OF RADIATION FROM A RING NEAR A ROTATING BLACK HOLE

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