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| Paper: |
Clues on Blazars Phenomenology from the FIRST Flat Spectrum Sample |
| Volume: |
427, Accretion and Ejection in AGN: a Global View |
| Page: |
141 |
| Authors: |
Fossati, G.; Meyer, E. T. |
| Abstract: |
We highlight some results of our work on the FIRST Flat Spectrum Sample
(FFSS) of blazars, in particular concerning the relationship between their
luminosity and Spectral Energy Distribution (SED), including preliminary
results on the power of the emission of their Broad Line Region (BLR).
The current analysis shows that within the FFSS, which captures at once a
broad range of blazar phenomenology, the SED-power correlation which
constituted the observational basis of the blazar sequence hypothesis seems
to be present. We also find that FFSS BL Lac and FSRQ sources, despite
having been selected together, tend to stay separate with respect to
several properties, such as SED type and luminosities (e.g. radio,
γ-ray, BLR). The BLR analysis suggests that in BL Lac objects the
BLR is indeed under-luminous compared with FSRQ. This in turn suggests that
ratio between thermal and non-thermal emission in the two classes of
objects is different.
Finally, we discuss some clues emerging from the study of the sample of
blazars detected at GeV γ-rays by Fermi/LAT, focusing again on the
question of power of SED properties. |
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