Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010gras.conf..266y&link_type=abstract
GRAVITATION AND ASTROPHYSICS. Proceedings of the Ninth Asia-Pacific International Conference. Held 29 June-2 July 2009 in Wuhan,
Astronomy and Astrophysics
Astrophysics
Active Galactic Nuclei (Agns), Bl Lacs, Quasars, Γ-Ray Emissions
Scientific paper
In this work, the radio, X-ray and γ-ray emissions are compiled for sample of 42 flat spectrum radio quasars-FSRQs, to calculate the effective spectrum indices, namely the radio-X-ray spectrum index αRX, the radio-γ-ray spectrum index αRG and the X-ray to γ-ray spectrum index αXG. Also the correlations among αRX, αRG and αXG are investigated. It is interesting that bar α {RX} ˜= bar α {XG} ˜= bar α {RG} ≈ 0.82 for 42 FSRQs, which can be used to estimate the γ-ray emissions from the X-ray and the radio emissions. Clear correlations are found between αXG and αRX and between αRG and αXG respectively. A weak correlation between αRX and αRG is found. The results show that the γ-ray emissions are associated with both radio and the X-ray emissions in blazars.
Cheng Jun
Fan Jun-Hui
Nie Jian-Jun
Yang Jiang-He
Yang Ru-Shu
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