Evidence for a relativistic iron line in GRS 1915 + 105
نویسنده
چکیده
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.
منابع مشابه
Iron Line Diagnostics for the GRS 1915+105 Black Hole
Martocchia et al. (2002, Paper I [5]) and Martocchia et al. (2003, Paper II [6]) reported the discovery of intense iron Kα fluorescent emission in two BeppoSAX observations of themicroquasar GRS 1915+105, which took place respectively on April 19-20, 1998, and April 21-22, 2000. During these observations the Fe line is broad and asymmetric, best fitted with a relativistic disc model (see e.g. [...
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