Gamma-ray Beacons at the Dawn of the Universe

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dc.contributor.authorGasparrini, D.
dc.contributor.authorPaliya, V.S.
dc.contributor.authorAjello, M.
dc.contributor.authorOjha, R.
dc.contributor.authorFermi-LAT Collaboration
dc.date.accessioned2020-04-24T16:01:46Z
dc.date.available2020-04-24T16:01:46Z
dc.date.issued2017-07-10
dc.description35th International Cosmic Ray Conference — ICRC2017 10–20 July, 2017 Bexco, Busan, Koreaen_US
dc.description.abstractGamma ray detected high-redshift blazars (z>3) are intrinsically interesting since they inform us about the evolution of gamma-ray blazars and are, by definition, some of the more luminous blazars in the Universe. It has been found in many studies that such high z blazars host extremely massive black holes (MBH > 109M ) and thus shed a new light on the formation of supermassive black holes in the early Universe. Here we report the first detection of gamma-ray emitting blazars beyond z=3.1 using the sensitive Pass 8 dataset of Fermi-LAT. These objects are found to host extremely massive black holes at their centers, as confirmed from both IR-UV continuum modelling with a standard accretion disk and also with the emission line measurements using optical spectroscopy. Further details of the results will be presented within the framework of the disk-jet connection in powerful jetted AGNsen_US
dc.description.sponsorshipThe Fermi-LAT Collaboration acknowledges support for LAT development, operation and data analysis from NASA and DOE (United States), CEA/Irfu and IN2P3/CNRS (France), ASI and INFN (Italy), MEXT, KEK, and JAXA (Japan), and the K.A. Wallenberg Foundation, the Swedish Research Council and the National Space Board (Sweden). Science analysis support in the operations phase from INAF (Italy) and CNES (France) is also gratefully acknowledged. This work performed in part under DOE Contract DE-AC02-76SF00515. Part of this work is based on archival data, software, or online services provided by the ASI Science Data Center (ASDC).en_US
dc.description.urihttps://pos.sissa.it/301/659en_US
dc.format.extent2 filesen_US
dc.genreconference paper and proceedingsen_US
dc.genrepresentations (communicative events)
dc.identifierdoi:10.13016/m2aigh-x3kh
dc.identifier.citationGasparrini, D.; Paliya, V.S.; Ajello, M.; Ojha, R.; Fermi-LAT Collaboration; Gamma-ray Beacons at the Dawn of the Universe; 35th International Cosmic Ray Conference — ICRC2017; https://pos.sissa.it/301/659en_US
dc.identifier.urihttps://doi.org/10.22323/1.301.0659
dc.identifier.urihttp://hdl.handle.net/11603/18275
dc.language.isoen_USen_US
dc.publisherProceedings of Scienceen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.relation.ispartofUMBC Faculty Collection
dc.relation.ispartofUMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
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.rightsAttribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleGamma-ray Beacons at the Dawn of the Universeen_US
dc.typeTexten_US

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