F-GAMMA: variability Doppler factors of blazars from multiwavelength monitoring
نویسندگان
چکیده
منابع مشابه
Coordinated Multiwavelength Observations and Spectral Variability Modeling of Gamma-ray Blazars
Our recent progress on time-dependent modeling of the multiwavelength spectra and variability of blazars with leptonic and hadronic jet models is reviewed. Special emphasis is placed on X-ray spectral variability of low-frequency peaked (LBLs) and intermediate BL Lac objects (IBLs). As an example, recent observational and modeling results of an extensive multiwavelength campaign of BL Lacertae ...
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Blazar spectral energy distributions (SEDs) are double peaked and follow a selfsimilar sequence in luminosity. The so-called “blue” blazars, whose first SED component peaks at X-ray energies, are TeV sources, although with a relatively small fraction of their bolometric luminosities. The “red” blazars, with SED peaks in the infrared-optical range, appear to emit relatively more power in the gam...
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Much observational efforts have been devoted in recent years to study blazar variability across the electromagnetic spectrum (for a recent review see e.g., Ulrich, et al. 1997). In addition to spectral and polarization information, variability data can provide stringent constraints on the radiation mechanisms, the geometry of the emission regions, beaming factors, formation and dynamics of shoc...
متن کاملPatterns of variability in gamma-ray blazars
Preliminary results of a systematic study on the simultaneous optical-to-X-rays variability in blazars are presented. Data from Swift observations of four bright γ−ray blazars (3C 279, ON +231, S5 0716+71, PKS 2155−304) have been analyzed, compared, and discussed. Specifically, 3C 279 shows a variable flattening in the low energy part of the X-ray spectrum that appears to be confined in a speci...
متن کاملVariability and Unification of Blazars and Gamma Ray Bursts
Most models for blazars and gamma-ray bursts involve relativistic plasma outflows powered by accretion processes onto black holes. The blast wave physics developed for cosmological models of GRBs is reviewed. Two points relevant for blazar modeling are made: (1) The injection of nonthermal relativistic particles in the comoving frame is simply treated though a process of energizing the plasma a...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2017
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stx002