The flat-spectrum radio quasar 3C 345 from the high to the low emission state
The flat-spectrum radio quasar 3C 345 from the high to the low emission state
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平谱射电类星体 3C 345 从高发射状态到低发射状态
DOI:
10.1051/0004-6361/201731625
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发表时间:
2017-07
影响因子:
6.5
通讯作者:
Rafanelli P
中科院分区:
文献类型:
--
作者:
Berton M;Liao N H;La Mura G;Jarvela E;Congiu E;Foschini L;Frezzato M;Ramakrishnan V;Fan X L;Lahteenmaki A;Pursimo T;Abate V;Bai J M;Calcidese P;Ciroi S;Chen L;Cracco V;Li S K;Tornikoski M;Rafanelli P
We report simultaneous observations at different energy bands in radio, optical, UV, X-rays andγrays of the flat-spectrum radio-quasar 3C 345. We built the light curve of the source at different frequencies from 2008, the beginning of theFermiall-sky survey, to 2016, using new data and public archives. In particular we obtained several optical spectra, to study the behavior of emission lines and the continuum in different activity states and to derive the black hole mass. 3C 345 showed two flaring episodes in 2009, which occurred simultaneously inγray, optical/UV and X-rays, and were later followed in radio. The source shows an inverse Compton dominated spectral energy distribution, which moved from higher to lower frequencies from the high to the low state. The reverberation of emission lines during one outburst event allowed us to constrain the location of production ofγrays very close to the broad-line region, and possibly in the jet-base. We report the observation of an increased accretion after the outburst, possibly induced by the decrease of magnetic field intensity with respect to the low state.
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DOI:
10.1051/aas:1998297
发表时间:
1998-11
期刊:
--
影响因子:
--
作者:
M. Tornikoski;A. Mujunen
通讯作者:
M. Tornikoski;A. Mujunen
DOI:
10.1086/497163
发表时间:
2005-12
期刊:
The Astronomical Journal
影响因子:
--
作者:
G. Xie;H. T. Liu;G. Cha;S. Zhou;L. Ma;Z. Xie;L. E. Chen
通讯作者:
G. Xie;H. T. Liu;G. Cha;S. Zhou;L. Ma;Z. Xie;L. E. Chen
DOI:
10.1051/0004-6361/201117705
发表时间:
2011-11
期刊:
arXiv: Cosmology and Nongalactic Astrophysics
影响因子:
--
作者:
F. Schinzel;A. Lobanov;G. Taylor;S. Jorstad;A. Marscher;J. Zensus
通讯作者:
F. Schinzel;A. Lobanov;G. Taylor;S. Jorstad;A. Marscher;J. Zensus
影响因子:
6.5
作者:
A. Lobanov;J. Roland
通讯作者:
A. Lobanov;J. Roland
DOI:
10.1088/0004-6256/146/5/120
发表时间:
2013-08
期刊:
The Astronomical Journal
影响因子:
--
作者:
M. Lister;M. Aller;H. Aller;D. Homan;K. Kellermann;Y. Kovalev;Y. Kovalev;A. Pushkarev;A. Pushkare
通讯作者:
M. Lister;M. Aller;H. Aller;D. Homan;K. Kellermann;Y. Kovalev;Y. Kovalev;A. Pushkarev;A. Pushkare