SEARCH FOR GAMMA-RAY EMISSION FROM X-RAY-SELECTED SEYFERT GALAXIES WITH FERMI-LAT
SEARCH FOR GAMMA-RAY EMISSION FROM X-RAY-SELECTED SEYFERT GALAXIES WITH FERMI-LAT
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DOI：
10.1088/0004-637x/747/2/104
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发表时间：
2011-09
期刊：
影响因子：
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通讯作者：
M. Ackermann;M. Ajello;A. Allafort;L. Baldini;J. Ballet;G. Barbiellini;D. Bastieri;K. Bechtol;R. Bellazzini;B. Berenji;E. Bloom;E. Bonamente;A. Borgland;J. Bregeon;M. Brigida;P. Bruel;R. Buehler;S. Buson;G. Caliandro;R. Cameron;P. Caraveo;J. Casandjian;E. Cavazzuti;C. Cecchi;E. Charles;A. Chekhtman;C. C. Cheung-C.;J. Chiang;S. Ciprini;R. Claus;J. Cohen-Tanugi;J. Conrad;S. Cutini;F. D’Ammando;A. Angelis;F. Palma;C. Dermer;E. Silva;P. Drell;A. Drlica-Wagner;T. Enoto;C. Favuzzi;S. Fegan;E. Ferrara;P. Fortin;Y. Fukazawa;P. Fusco;F. Gargano;D. Gasparrini;N. Gehrels;S. Germani;N. Giglietto;P. Giommi;F. Giordano;M. Giroletti;G. Godfrey;J. Grove;S. Guiriec;D. Hadasch;M. Hayashida;E. Hays;R. Hughes;G. Jóhannesson;A. Johnson;T. Kamae;H. Katagiri;J. Kataoka;J. Knödlseder;M. Kuss;J. Lande;M. Garde;F. Longo;F. Loparco;B. Lott;M. Lovellette;P. Lubrano;G. Madejski;M. Mazziotta;P. Michelson;T. Mizuno;C. Monte;M. Monzani;A. Morselli;I. Moskalenko;S. Murgia;S. Nishino;J. Norris;E. Nuss;M. Ohno;T. Ohsugi;A. Okumura;E. Orlando;M. Ozaki;D. Paneque;M. Pesce-Rollins;M. Pierbattista;F. Piron;G. Pivato;T. Porter;S. Rainò;R. Rando;M. Razzano;A. Reimer;O. Reimer;S. Ritz;M. Roth;D. Sanchez;C. Sbarra;C. Sgro’;E. Siskind;G. Spandre;P. Spinelli;Ł. Stawarz;A. Strong;H. Takahashi;Tadayuki Takahashi;Takaaki Tanaka;J. Thayer;D. Thompson;L. Tibaldo;M. Tinivella;D. Torres;G. Tosti;E. Troja;Y. Uchiyama;T. Usher;J. Vandenbroucke;V. Vasileiou;G. Vianello;V. Vitale;A. Waite;B. Winer;K. Wood;M. Wood;Zhirong Yang;S. Zimmer
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文献类型：
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作者：
M. Ackermann;M. Ajello;A. Allafort;L. Baldini;J. Ballet;G. Barbiellini;D. Bastieri;K. Bechtol;R. Bellazzini;B. Berenji;E. Bloom;E. Bonamente;A. Borgland;J. Bregeon;M. Brigida;P. Bruel;R. Buehler;S. Buson;G. Caliandro;R. Cameron;P. Caraveo;J. Casandjian;E. Cavazzuti;C. Cecchi;E. Charles;A. Chekhtman;C. C. Cheung-C.;J. Chiang;S. Ciprini;R. Claus;J. Cohen-Tanugi;J. Conrad;S. Cutini;F. D’Ammando;A. Angelis;F. Palma;C. Dermer;E. Silva;P. Drell;A. Drlica-Wagner;T. Enoto;C. Favuzzi;S. Fegan;E. Ferrara;P. Fortin;Y. Fukazawa;P. Fusco;F. Gargano;D. Gasparrini;N. Gehrels;S. Germani;N. Giglietto;P. Giommi;F. Giordano;M. Giroletti;G. Godfrey;J. Grove;S. Guiriec;D. Hadasch;M. Hayashida;E. Hays;R. Hughes;G. Jóhannesson;A. Johnson;T. Kamae;H. Katagiri;J. Kataoka;J. Knödlseder;M. Kuss;J. Lande;M. Garde;F. Longo;F. Loparco;B. Lott;M. Lovellette;P. Lubrano;G. Madejski;M. Mazziotta;P. Michelson;T. Mizuno;C. Monte;M. Monzani;A. Morselli;I. Moskalenko;S. Murgia;S. Nishino;J. Norris;E. Nuss;M. Ohno;T. Ohsugi;A. Okumura;E. Orlando;M. Ozaki;D. Paneque;M. Pesce-Rollins;M. Pierbattista;F. Piron;G. Pivato;T. Porter;S. Rainò;R. Rando;M. Razzano;A. Reimer;O. Reimer;S. Ritz;M. Roth;D. Sanchez;C. Sbarra;C. Sgro’;E. Siskind;G. Spandre;P. Spinelli;Ł. Stawarz;A. Strong;H. Takahashi;Tadayuki Takahashi;Takaaki Tanaka;J. Thayer;D. Thompson;L. Tibaldo;M. Tinivella;D. Torres;G. Tosti;E. Troja;Y. Uchiyama;T. Usher;J. Vandenbroucke;V. Vasileiou;G. Vianello;V. Vitale;A. Waite;B. Winer;K. Wood;M. Wood;Zhirong Yang;S. Zimmer
本文利用费米大天区望远镜（LAT）三年的观测数据，对120个被归类为“射电宁静”天体的硬X射线选择塞弗特星系的γ射线性质进行了系统的研究。我们的塞弗特星系样本是使用雨燕爆发警报望远镜58月星表选择的，将分析限制在银河系高纬度平均硬X射线通量为F14 − 195 keV <$2.5 × 10−11 erg cm−2 s−1的亮源（|B|> 10°）。为了从样品中去除“无线电响亮”的物体，我们使用“硬X射线无线电响度参数”RrX，定义为总的1.4 GHz无线电与14-195 keV硬X射线能量通量的比率。在120个X射线明亮的塞弗特星系中，RrX 25）与任何目标塞弗特星系的位置一致，除了ESO 323-G 077和NGC 6814。在95%置信水平下，从分析的Seyferts得到的100 MeV以上的积分光子通量的γ射线上限平均值为104 × 10−9光子cm−2 s−1，并且对几个天体推导出的上限达到101 × 10−9光子cm−2 s−1。我们的结果表明，在GeV能量附近的塞弗茨光谱中不存在与活动星系核活动相关的明显γ射线发射分量。我们的样品的费米LAT上限探测到γ射线与X射线的亮度比Lγ/LX < 0.1，在某些情况下甚至<0.01。所获得的结果施加新的约束模型的高能辐射的“无线电安静”塞弗特星系。
We report on a systematic investigation of the γ-ray properties of 120 hard X-ray-selected Seyfert galaxies classified as “radio-quiet” objects, utilizing the three-year accumulation of Fermi Large Area Telescope (LAT) data. Our sample of Seyfert galaxies is selected using the Swift Burst Alert Telescope 58 month catalog, restricting the analysis to the bright sources with average hard X-ray fluxes F14 − 195 keV ⩾ 2.5 × 10−11 erg cm−2 s−1 at high Galactic latitudes (|b| > 10°). In order to remove “radio-loud” objects from the sample, we use the “hard X-ray radio loudness parameter,” RrX, defined as the ratio of the total 1.4 GHz radio to 14–195 keV hard X-ray energy fluxes. Among 120 X-ray bright Seyfert galaxies with RrX 25) positionally coincident with any target Seyferts, with possible exceptions of ESO 323–G077 and NGC 6814. The mean value of the 95% confidence level γ-ray upper limit for the integrated photon flux above 100 MeV from the analyzed Seyferts is ≃ 4 × 10−9 photons cm−2 s−1 , and the upper limits derived for several objects reach ≃ 1 × 10−9 photons cm−2 s−1 . Our results indicate that no prominent γ-ray emission component related to active galactic nucleus activity is present in the spectra of Seyferts around GeV energies. The Fermi-LAT upper limits derived for our sample probe the ratio of γ-ray to X-ray luminosities Lγ/LX < 0.1, and even <0.01 in some cases. The obtained results impose novel constraints on the models for high-energy radiation of “radio-quiet” Seyfert galaxies.