Fermi Large Area Telescope Observations Of Misaligned Active Galactic Nuclei

Abdo, A. A.

doi:10.1088/0004-637X/720/1/912

Title: Fermi Large Area Telescope Observations Of Misaligned Active Galactic Nuclei

Journal Article · Fri Aug 13 00:00:00 EDT 2010 · The Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/720/1/912· OSTI ID:1357528

Abdo, A. A. ^[1]

Naval Research Lab. (NRL), Washington, DC (United States);et al.

Analysis is presented for 15 months of data taken with the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope for 11 non-blazar active galactic nuclei (AGNs), including seven FRI radio galaxies and four FRII radio sources consisting of two FRII radio galaxies and two steep spectrum radio quasars. The broad line FRI radio galaxy 3C 120 is reported here as a γ-ray source for the first time. The analysis is based on directional associations of LAT sources with radio sources in the 3CR, 3CRR, and MS4 (collectively referred to as 3C-MS) catalogs. Seven of the eleven LAT sources associated with 3C-MS radio sources have spectral indices larger than 2.3 and, except for the FRI radio galaxy NGC 1275 that shows possible spectral curvature, are well described by a power law. No evidence for time variability is found for any sources other than NGC 1275. The γ-ray luminosities of FRI radio galaxies are significantly smaller than those of the BL Lac objects detected by the LAT, whereas the γ-ray luminosities of the FRII sources are quite similar to those of FSRQs, which could reflect different beaming factors for the γ-ray emission. A core dominance (CD) study of the 3CRR sample indicates that sources closer to the jet axis are preferentially detected with the Fermi LAT, insofar as the γ-ray-detected misaligned AGNs have larger CD at a given average radio flux. The results are discussed in view of the AGN unification scenario.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: Fermi LAT Collaboration

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1357528

Journal Information:: The Astrophysical Journal, Vol. 720, Issue 1; ISSN 0004-637X

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 128 works

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The Origins of the Gamma-Ray Flux Variations of NGC 1275 Based on Eight Years of Fermi -LAT Observations Tanada, K.; Kataoka, J.; Arimoto, M. The Astrophysical Journal, Vol. 860, Issue 1 https://doi.org/10.3847/1538-4357/aac26b	journal	June 2018
Revealing the Broad Line Region of NGC 1275: The Relationship to Jet Power Punsly, Brian; Marziani, Paola; Bennert, Vardha N. The Astrophysical Journal, Vol. 869, Issue 2 https://doi.org/10.3847/1538-4357/aaec75	journal	December 2018
The Circinus Galaxy Revisited with 10 yr Fermi -LAT Data Guo, Xiao-Lei; Xin, Yu-Liang; Liao, Neng-Hui The Astrophysical Journal, Vol. 885, Issue 2 https://doi.org/10.3847/1538-4357/ab44ba	journal	November 2019
FIRST DETECTION IN GAMMA-RAYS OF A YOUNG RADIO GALAXY: FERMI -LAT OBSERVATIONS OF THE COMPACT SYMMETRIC OBJECT PKS 1718−649 Migliori, G.; Siemiginowska, A.; Sobolewska, M. The Astrophysical Journal, Vol. 821, Issue 2 https://doi.org/10.3847/2041-8205/821/2/l31	journal	April 2016
SUZAKU OBSERVATIONS OF γ-RAY BRIGHT RADIO GALAXIES: ORIGIN OF THE X-RAY EMISSION AND BROADBAND MODELING Fukazawa, Yasushi; Finke, Justin; Stawarz, Łukasz The Astrophysical Journal, Vol. 798, Issue 2 https://doi.org/10.1088/0004-637x/798/2/74	journal	December 2014
The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud Zdziarski, A. A.; Malyshev, D.; De Ona Wilhelmi, E. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2016-01252	text	January 2016
DISCOVERY OF γ -RAY EMISSION FROM THE RADIO-INTERMEDIATE QUASAR III ZW 2: VIOLENT JET ACTIVITY WITH INTRADAY γ -RAY VARIABILITY Liao, Neng-Hui; Xin, Yu-Liang; Fan, Xu-Liang The Astrophysical Journal Supplement Series, Vol. 226, Issue 2 https://doi.org/10.3847/0067-0049/226/2/17	journal	October 2016
X-Ray and GeV Gamma-Ray Variability of the Radio Galaxy NGC 1275 Fukazawa, Yasushi; Shiki, Kensei; Tanaka, Yasuyuki The Astrophysical Journal, Vol. 855, Issue 2 https://doi.org/10.3847/1538-4357/aaabc0	journal	March 2018
From the Blazar Sequence to the Blazar Envelope: Revisiting the Relativistic jet Dichotomy in Radio-Loud Active Galactic Nuclei Meyer, Eileen T.; Fossati, Giovanni; Georganopoulos, Markos IOP https://doi.org/10.13016/m2mqfb-qm3t	collection	January 2011
H.E.S.S. discovery of very high energy $\gamma$-ray emission from PKS 0625-354 Abdalla, H.; Abramowski, A.; Aharonian, F. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2018-01567	text	January 2018
Broad Line Radio Galaxies Observed with Fermi-LAT: The Origin of the GeV Gamma-Ray Emission Kataoka, J.; Stawarz, L.; Takahashi, Y. arXiv https://doi.org/10.48550/arxiv.1107.3370	text	January 2011
The radio/gamma-ray connection in Active Galactic Nuclei in the era of the Fermi Large Area Telescope Ackermann, M.; Ajello, M.; Allafort, A. arXiv https://doi.org/10.48550/arxiv.1108.0501	text	January 2011
GENJI Programme: Gamma-ray Emitting Notable AGN Monitoring by Japanese VLBI Nagai, Hiroshi; Kino, Motoki; Niinuma, Kotaro arXiv https://doi.org/10.48550/arxiv.1210.2496	text	January 2012
Compton Dominance and the Blazar Sequence Finke, Justin arXiv https://doi.org/10.48550/arxiv.1212.0869	text	January 2012
Suzaku Observations of gamma-Ray Bright Radio Galaxies: Origin of the X-ray Emission and Broad-Band Modelin Fukazawa, Yasushi; Finke, Justin; Stawarz, Lukasz arXiv https://doi.org/10.48550/arxiv.1410.2733	text	January 2014
High-energy Emission Processes in M 87 de Jong, S.; Beckmann, V.; Soldi, S. arXiv https://doi.org/10.48550/arxiv.1504.06517	preprint	January 2015
The high-energy gamma-ray detection of G73.9+0.9, a supernova remnant interacting with a molecular cloud Zdziarski, Andrzej A.; Malyshev, Denys; Wilhelmi, Emma de Ona arXiv https://doi.org/10.48550/arxiv.1509.04046	text	January 2015
Fermi-LAT Observation of Non-Blazar AGNs Sahakyan, N.; Baghmanyan, V.; Zargaryan, D. arXiv https://doi.org/10.48550/arxiv.1801.09381	text	January 2018
Revealing the Broad Line Region of NGC 1275: The Relationship to Jet Power Punsly, Brian; Marziani, Paola; Bennert, Vardha N. arXiv https://doi.org/10.48550/arxiv.1810.11716	text	January 2018
The High Energy View of FR0 Radio Galaxies Baldi, Ranieri D.; Torresi, Eleonora; Migliori, Giulia arXiv https://doi.org/10.48550/arxiv.1909.04113	preprint	January 2019
Gamma-ray observations of low-luminosity active galactic nuclei de Menezes, Raniere; Nemmen, Rodrigo; Finke, Justin D. arXiv https://doi.org/10.48550/arxiv.2001.03184	text	January 2020

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