Toward a New Paradigm for the Unification of Radio Loud AGN and its Connection to Accretion

Details Toward a New Paradigm for the Unification of Radio Loud AGN and its Connection to Accretion Toward a New Paradigm for the Unification of Radio Loud AGN and its Connection to Accretion

2011-11-21

arxiv.org/abs/1111.4711v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Proceedings of the Fermi May 2011 meeting in Rome, Italy

Scientific paper

We recently argued (Meyer 2011) that the collective properties of radio loud active galactic nuclei point to the existence of two families of sources, one of powerful sources with single velocity jets and one of weaker jets with significant velocity gradients in the radiating plasma. These families also correspond to different accretion modes and therefore different thermal and emission line intrinsic properties: powerful sources have radiatively efficient accretion disks, while in weak sources accretion must be radiatively inefficient. Here, after we briefly review of our recent work, we present the following findings that support our unification scheme: (i) along the broken sequence of aligned objects, the jet kinetic power increases. (ii) in the powerful branch of the sequence of aligned objects the fraction of BLLs decreases with increasing jet power. (iii) for powerful sources, the fraction of BLLs increases for more un-aligned objects, as measured by the core to extended radio emission. Our results are also compatible with the possibility that a given accretion power produces jets of comparable kinetic power.

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