The blazar sequence 2.0

Abstract

I discuss the spectral energy distribution (SED) of all blazars with redshift detected by the {\it Fermi} satellite and listed in the 3LAC catalog. I will update the so called "blazar sequence" from the phenomenological point of view, with no theory or modelling. I will show that: i) pure data show that jet and accretion power are related; ii) the updated blazar sequence maintains the properties of the old version, albeit with a less pronounced dominance of the $\gamma$--ray emission; iii) at low bolometric luminosities, two different type of objects have the same high energy power: low black hole mass flat spectrum radio quasars and high mass BL Lacs. Therefore, at low luminosities, there is a very large dispersion of SED shapes; iv) in low power BL Lacs, the contribution of the host galaxy is important. Remarkably, the luminosity distribution of the host galaxies of BL Lacs are spread in a very narrow range; v) a simple sum of two smoothly joining power laws can describe the blazar SEDs very well.

arXiv commentInvited paper for the meeting: Blazars through sharp multi-wavelength eyes. Editors: Jose L. Gomez, Alan P. Marscher and Svetlana G. Jorstad. To appear in Galaxies. 10 pages, 7 figures

References in corpus (14)

• A Unifying View of the Spectral Energy Distributions of Blazars
• A theoretical unifying scheme for gamma-ray bright blazars
• The power of relativistic jets is larger than the luminosity of their accretion disks
• Gamma-ray Light Curves and Variability of Bright Fermi-Detected Blazars
• Advection-Dominated Accretion and Black Hole Event Horizons
• The Evolution of Swift/BAT blazars and the origin of the MeV background
• Imaging redshifts of BL Lac objects
• The Black Hole Mass-Bulge Luminosity Relationship for Active Galactic Nuclei from Reverberation Mapping and Hubble Space Telescope Imaging
• The black hole mass of low redshift radiogalaxies
• Chasing the heaviest black holes of jetted Active Galactic Nuclei
• What Types of Jets does Nature Make: A New Population of Radio Quasars
• BL Lacertae objects beyond redshift 1.3 - UV-to-NIR photometry and photometric redshift for Fermi/LAT blazars
• The Blazar Sequence: Validity and Predictions
• The recognition of blazars and the blazar spectral sequence

Cited by in corpus (1)

• A time dependent approach to model X-ray and $\gamma$--ray light curves of Mrk 421 observed during the flare in February 2010