SEDs and Beaming Effect for Fermi Blazars
نویسندگان
چکیده
منابع مشابه
Beaming effect for Fermi/LAT blazars
In this talk, we will show the beaming effect for Fermi/LAT blazars, then we discuss the correlations between γ-ray luminosity and other parameters, such as radio Doppler factors, superluminal motions, and core-dominance parameters. We also compare the Doppler factors determined from the γ-ray luminosity, X-ray emissions, and the short-term time scales with those from other methods. Our discuss...
متن کاملThe Fermi blazars divide
Flat Spectrum Radio Quasars (FSRQs) and BL Lac objects detected in the first three months of the Fermi survey neatly separate in the γ–ray spectral index vs γ–ray luminosity plane. BL Lac objects are less luminous and have harder spectra than broad line blazars. We suggest that this division has its origin in the different accretion regimes of the two classes of objects. Using the γ–ray luminos...
متن کاملThe Classifications and Some Correlations for Fermi Blazars
In a recent paper, we calculate spectral energy distributions (SEDs) for 1425 Fermi blazars, classifications of low synchrotron peak sources (LSPs) if log νp(Hz) ≤ 14.0, intermediate synchrotron peak sources (ISPs) if 14.0 < log νp(Hz) ≤ 15.3, and high synchrotron peak sources (HSPs) if log νp(Hz) > 15.3 are made based on 999 logarithms of synchrotron peak frequencies with known redshift, and w...
متن کاملGeneral physical properties of bright Fermi blazars
We studied all blazars of known redshift detected by the Fermi satellite during its first three– months survey. For the majority of them, pointed Swift observations ensures a good multiwavelength coverage, enabling us to to reliably construct their spectral energy distributions (SED). We model the SEDs using a one–zone leptonic model and study the distributions of the derived interesting physic...
متن کاملThe polarization and beaming effect for GRBs
Both observations and theoretical models suggest that the emissions in gamma-ray bursts (GRBs) and the afterglows are beamed. We argue that the recent polarization measured in the afterglows gives further evidence of beaming in GRBs. In this approach, we adopted the polarization-magnitude relation of BL Lacertae objects to 4 GRBs with available polarization measurements and found that the data ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Astronomy and Space Sciences
سال: 2016
ISSN: 2093-5587
DOI: 10.5140/jass.2016.33.2.105