Journal
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
Volume 66, Issue 1, Pages -Publisher
OXFORD UNIV PRESS
DOI: 10.1093/pasj/pst008
Keywords
gamma-rays: general; quasars: emission lines; radiation mechanisms: non-thermal
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Funding
- National Basic Research Program of China (973 Program) [2009CB824800]
- National Natural Science Foundation of China [11133006, 11163006, 11173054]
- Policy Research Program of the Chinese Academy of Sciences [KJCX2-YW-T24]
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The broad-line region (BLR) is an important component of blazars, especially for flat spectrum radio quasars. The soft photons arising from the BLR will substantially affect the transparency of the gamma-ray photons produced in the relativistic jet. We study the effect of the geometrical structure of the BLR on the absorption of gamma-rays. We find that the gamma-ray optical depth strongly depends on the geometrical structure of the BLR. For a flat BLR geometry, gamma-ray photons with specified energies could escape transparently even if their emission region is located inside the cavity of the BLR.
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