Breaking the Blazar Sequence: A New View of Radio Loud AGN Unification

dc.contributor.authorMeyer, Eileen T.
dc.contributor.authorFossati, Giovanni
dc.contributor.authorGeorganopoulos, Markos
dc.contributor.authorLister, Matthew L.
dc.date.accessioned2020-08-25T15:46:53Z
dc.date.available2020-08-25T15:46:53Z
dc.date.issued2012-05-03
dc.description2011 Fermi & Jansky: Our Evolving Understanding of AGN, St Michaels, MD, Nov. 10-12en_US
dc.description.abstractIn recent work, we have identified two sub-populations of radio-loud AGN which appear to be distinguished by jet structure, where low-efficiency accreting systems produce `weak' jets which decelerate more rapidly than the `strong' jets of black holes accreting near the Eddington limit. The two classes are comprised of: (1) The weak jet sources, corresponding to FR I radio galaxies, having a decelerating or spine-sheath jet with velocity gradients, and (2) The strong jet sources, having fast, collimated jets, and typically displaying strong emission lines. The dichotomy in the \nu_peak-L_peak plane can be understood as a `broken power sequence' in which jets exist on one branch or the other based on the particular accretion mode. We suggest that the intrinsic kinetic power (as measured by low-frequency, isotropic radio emission), the orientation, and the accretion rate of the SMBH system are the the fundamental axes needed for unification of radio-loud AGN by studying a well-characterized sample of several hundred Fermi-detected jets. Finally, we present very recent findings that the most powerful strong jets produce gamma-rays by external Compton rather than SSC emission, placing the dissipation region in these strong jets at a radius inside the BLR and/or molecular torus.en_US
dc.description.sponsorshipGF and EM acknowledge support from NASA grants NNG05GJ10G, NNX06AE92G, and NNX09AR04G, as well as SAO grants GO3-4147X and G05-6115X. MG acknowledges support from the NASA ATFP grant NNX08AG77G and NASA FERMI grant NNH08ZDA001N. The MOJAVE project is supported under National Science Foundation grant 0807860-AST.en_US
dc.description.urihttps://arxiv.org/abs/1205.0794en_US
dc.format.extent7 pagesen_US
dc.genreconference papers and proceedings preprintsen_US
dc.identifierdoi:10.13016/m2uswc-ov84
dc.identifier.citationEileen T. Meyer, Giovanni Fossati, Markos Georganopoulos and Matthew L. Lister, Breaking the Blazar Sequence: A New View of Radio Loud AGN Unification, https://arxiv.org/abs/1205.0794en_US
dc.identifier.urihttp://hdl.handle.net/11603/19505
dc.language.isoen_USen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology (JCET)
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.titleBreaking the Blazar Sequence: A New View of Radio Loud AGN Unificationen_US
dc.typeTexten_US

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