| タイトル | A Diagnostic Test for Determining the Location of the GeV Emission in Powerful Blazars |
| 本文（外部サイト） | http://hdl.handle.net/2060/20120010501 |
| 著者（英） | Perlman, Eric; Georganopoulos, Markos; Dotson, Amanda; Kazanas, Demosthenes |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2011-05-09 |
| 言語 | eng |
| 内容記述 | An issue currently under debate in the literature is how far from the black hole is the Fermi-observed GeV emission of powerful blazars emitted. Here we present a clear diagnostic tool for testing whether the Ge V emission site is located within the sub-pc broad emission line (BLR) region or further out in the few pc scale molecular torus (MT) environment. Within the BLR the scatteri~ takes place at the onset of the Klein-Nishina regime, causing the electron cooling time to become almost energy independent and as a result, the variation of high-energy emission is expected to be achromatic. Contrarily, if the emission site is located outside the BLR, the expected GeY variability is energy-dependent and with amplitude increasing with energy. We demonstrate this using time-dependent numerical simulations of blazar variability. |
| NASA分類 | Astronomy |
| レポートNO | GSFC.JA.00375.2012 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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