FERMI LARGE AREA TELESCOPE OBSERVATIONS OF MISALIGNED ACTIVE GALACTIC NUCLEI

被引：143

作者：

Abdo, A. A. ^{[2
,3
]}

Ackermann, M. ^{[4
,5
]}

Ajello, M. ^{[4
,5
]}

Baldini, L. ^{[6
]}

Ballet, J. ^{[7
]}

Barbiellini, G. ^{[8
,9
]}

Bastieri, D. ^{[10
,11
]}

Bechtol, K. ^{[4
,5
]}

Bellazzini, R. ^{[6
]}

Berenji, B. ^{[4
,5
]}

Blandford, R. D. ^{[4
,5
]}

Bloom, E. D. ^{[4
,5
]}

Bonamente, E. ^{[12
,13
]}

Borgland, A. W. ^{[4
,5
]}

Bouvier, A. ^{[4
,5
]}

Brandt, T. J. ^{[14
,15
]}

Bregeon, J. ^{[6
]}

Brez, A. ^{[6
]}

Brigida, M. ^{[16
,17
,18
]}

Bruel, P. ^{[19
]}

Buehler, R. ^{[4
,5
]}

Burnett, T. H. ^{[20
]}

Buson, S. ^{[10
,11
]}

Caliandro, G. A. ^{[21
]}

Cameron, R. A. ^{[4
,5
]}

Cannon, A. ^{[22
,23
]}

Caraveo, P. A. ^{[24
]}

Carrigan, S. ^{[11
]}

Casandjian, J. M. ^{[7
]}

Cavazzuti, E. ^{[25
]}

Cecchi, C. ^{[12
,13
]}

Celik, Oe ^{[22
,26
,27
,28
]}

Celotti, A. ^{[29
]}

Charles, E. ^{[4
,5
]}

Chekhtman, A. ^{[2
,30
]}

Chen, A. W. ^{[24
]}

Cheung, C. C. ^{[2
,3
]}

Chiang, J. ^{[4
,5
]}

Ciprini, S. ^{[13
]}

Claus, R. ^{[4
,5
]}

Cohen-Tanugi, J. ^{[31
]}

Colafrancesco, S. ^{[25
]}

Conrad, J. ^{[32
,33
]}

Davis, D. S. ^{[22
,27
,28
]}

Dermer, C. D. ^{[2
]}

de Angelis, A. ^{[34
,35
]}

de Palma, F. ^{[16
,17
,18
]}

do Couto e Silva, E. ^{[4
,5
]}

Drell, P. S. ^{[4
,5
]}

Dubois, R. ^{[4
,5
]}

机构：

[1] INAF IASF Bologna, I-40129 Bologna, Italy

[2] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA

[3] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA

[4] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA

[5] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA

[6] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy

[7] Univ Paris Diderot, Serv Astrophys, CEA Saclay, Lab AIM,CEA,IRFU,CNRS, F-91191 Gif Sur Yvette, France

[8] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy

[9] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[10] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy

[11] Univ Padua, Dipartimento Fis G Galilei, I-35131 Padua, Italy

[12] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy

[13] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy

[14] UPS, CNRS, Ctr Etud Spatiale Rayonnements, F-31028 Toulouse 4, France

[15] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA

[16] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy

[17] Politecn Bari, I-70126 Bari, Italy

[18] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[19] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[20] Univ Washington, Dept Phys, Seattle, WA 98195 USA

[21] CSIC, IEEC, Inst Ciencies Espai, Barcelona 08193, Spain

[22] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[23] Univ Coll Dublin, Dublin 4, Ireland

[24] Ist Astrofis Spaziale & Fis Cosm, INAF, I-20133 Milan, Italy

[25] ASI, Sci Data Ctr, I-00044 Rome, Italy

[26] CRESST, Greenbelt, MD 20771 USA

[27] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

[28] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA

[29] Scuola Int Super Studi Avanzati, I-34014 Trieste, Italy

[30] George Mason Univ, Fairfax, VA 22030 USA

[31] Univ Montpellier 2, CNRS, IN2P3, Lab Phys Theor & Astroparticules, Montpellier, France

[32] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden

[33] AlbaNova, Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden

[34] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy

[35] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy

[36] Ist Nazl Astrofis, Osservatorio Astron Trieste, I-34143 Trieste, Italy

[37] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan

[38] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[39] CEN Bordeaux Gradignan, CNRS, IN2P3, UMR 5797, F-33175 Gradignan, France

[40] Univ Bordeaux, CEN Bordeaux Gradignan, UMR 5797, F-33175 Gradignan, France

[41] Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35899 USA

[42] ICREA, Barcelona, Spain

[43] Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden

[44] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan

[45] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[46] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[47] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[48] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA

[49] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan

[50] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 720卷 / 01期

基金：

美国国家航空航天局; 瑞典研究理事会;

关键词：

galaxies: active; galaxies: jets; gamma rays: general; GAMMA-RAY EMISSION; I RADIO GALAXIES; MOLONGLO-SOUTHERN-4-JY SAMPLE MS4; RELATIVISTIC JETS; M87; JET; SPACE-TELESCOPE; HIGH-RESOLUTION; LAC OBJECTS; SCALE JETS; HOT-SPOTS;

D O I：

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

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 gamma-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 gamma-ray luminosities of FRI radio galaxies are significantly smaller than those of the BL Lac objects detected by the LAT, whereas the gamma-ray luminosities of the FRII sources are quite similar to those of FSRQs, which could reflect different beaming factors for the gamma-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 gamma-ray-detected misaligned AGNs have larger CD at a given average radio flux. The results are discussed in view of the AGN unification scenario.

引用

页码：912 / 922

页数：11

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