Relativistic beaming and gamma-ray brightness of blazars
نویسندگان
چکیده
منابع مشابه
Gamma-Ray Blazars
Roughly 60 blazars have been identiied with > 100 MeV EGRET gamma-ray sources, and exhibit inferred isotropic luminosities as large as 3 10 49 ergs s ?1. The two most remarkable characteristics about the EGRET observations are that the-ray luminosity often dominates the bolometric power, and that variability on timescales at least as short as a day is seen from several sources in their aring st...
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As shown by Maraschi (this volume) the overall spectral energy distribution (SED) of the blazars detected by EGRET shows two peaks, in a ν–νF (ν) plot. With few exceptions, the minimum between these two peaks occurs in the X–ray range. We can exploit this observational fact to constrain the models proposed to account for the SED of blazars, and to reach an important conclusion: the conversion o...
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متن کاملEffects of Luminosity Functions Induced by Relativistic Beaming on Statistics of Cosmological Gamma-Ray Bursts
Most of gamma-ray bursts (GRBs) models have predicted that the intrinsic isotropic energy is limited to below ∼ 10ergs. Recently claimed high redshifts, correlation with supernovae, and connection to the cosmic star formation activity point to a different energy requirement and source evolution history possibly with strong beaming. We study the effects of the beaming-induced luminosity function...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200913740