Detecting supermassive binary black holes with VLBI - discovery of a ring-structure in 3C454.3

被引：11

作者：

Britzen, S. ^{[1
]}

Zamaninasab, M. ^{[1
]}

Aller, M. ^{[2
]}

Aller, H. ^{[2
]}

Kurtanidze, O. ^{[3
]}

Vercellone, S. ^{[4
]}

Richter, G. M. ^{[5
]}

Witzel, A. ^{[1
]}

Krichbaum, T. P. ^{[1
]}

Zensus, J. A. ^{[1
]}

机构：

[1] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[2] Univ Michigan, Dept Astron, Ann Arbor, MI USA

[3] Abastumani Observ, Mt Kanobili, Georgia

[4] INAF, IASF, Palermo, Italy

[5] Astrophys Inst Potsdam, D-14482 Potsdam, Germany

来源：

ASTRONOMY AT HIGH ANGULAR RESOLUTION 2011: THE CENTRAL KILOPARSEC IN GALACTIC NUCLEI | 2012年 / 372卷

基金：

美国国家科学基金会;

关键词：

ACTIVE GALACTIC NUCLEI; JETS; MOJAVE; IMAGES;

D O I：

10.1088/1742-6596/372/1/012029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the detection of the first VLBI ring-structure around the core of an AGN - around the core of the quasar 3C454.3. This ring-structure starts being visible in VLBI maps around 1996. It expands with an apparent velocity between 0.11 +/- 0.01mas/yr and 0.18 +/- 0.01mas/yr and dominates the pc-scale structure for at least 14 years. This is the result of a re-analysis of 41 VLBA data sets at six different radio frequencies observed between 1995.57 and 2011.48. We observe a correlation between radio flaring, flux-density variability, a ring-structure and kinematic properties of the jet. Taken together, it is tempting to see a causal connection and to explain all of this geometrically. The kinematic changes as well as the changes in the flaring characteristics might be caused by a change of the angle to the line of sight towards the observer. This behaviour resembles our findings for 0735+178 - with 3C454.3 being the second AGN to reveal kinematic mode changes. These mode changes could be explained by the presence of a supermassive binary black hole. 3C454.3 had been modelled as a binary black hole before.

引用

页数：7

共 18 条

[1] Understanding BL Lacertae objects Structural and kinematic mode changes in the BL Lac object PKS 0735+178 [J].

Britzen, S. ;

Witzel, A. ;

Gong, B. P. ;

Zhang, J. W. ;

Krishna, G. ;

Goyal, A. ;

Aller, M. F. ;

Aller, H. D. ;

Zensus, J. A. .

ASTRONOMY & ASTROPHYSICS, 2010, 515

[2] The VSOP 5 GHz continuum survey: The prelaunch VLBA observations [J].

Fomalont, EB ;

Frey, S ;

Paragi, Z ;

Gurvits, LI ;

Scott, WK ;

Taylor, AR ;

Edwards, PG ;

Hirabayashi, H .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2000, 131 (01) :95-183

[3] The non-ballistic superluminal motion in the plane of the sky [J].

Gong, Biping .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 389 (01) :315-320

[4] MOJAVE: Monitoring of jets in active galactic nuclei with VLBA experiments. II. First-epoch 15 GHz circular polarization results [J].

Homan, DC ;

Lister, ML .

ASTRONOMICAL JOURNAL, 2006, 131 (03) :1262-1279

[5] FLARING BEHAVIOR OF THE QUASAR 3C 454.3 ACROSS THE ELECTROMAGNETIC SPECTRUM [J].

Jorstad, Svetlana G. ;

Marscher, Alan P. ;

Larionov, Valeri M. ;

Agudo, Ivan ;

Smith, Paul S. ;

Gurwell, Mark ;

Lahteenmaki, Anne ;

Tornikoski, Merja ;

Markowitz, Alex ;

Arkharov, Arkadi A. ;

Blinov, Dmitry A. ;

Chatterjee, Ritaban ;

D'Arcangelo, Francesca D. ;

Falcone, Abe D. ;

Gomez, Jose L. ;

Hagen-Thorn, Vladimir A. ;

Jordan, Brendan ;

Kimeridze, Givi N. ;

Konstantinova, Tatiana S. ;

Kopatskaya, Evgenia N. ;

Kurtanidze, Omar ;

Larionova, Elena G. ;

Larionova, Liudmilla V. ;

McHardy, Ian M. ;

Melnichuk, Daria A. ;

Roca-Sogorb, Mar ;

Schmidt, Gary D. ;

Skiff, Brian ;

Taylor, Brian ;

Thum, Clemens ;

Troitsky, Ivan S. ;

Wiesemeyer, Helmut .

ASTROPHYSICAL JOURNAL, 2010, 715 (01) :362-384

[6]

Kemball A. J., 1996, APJ, V464, P55

[7] SEMIDYNAMICAL MODELS OF RADIO JETS - RELATIVISTIC BEAMING AND SOURCE COUNTS [J].

LIND, KR ;

BLANDFORD, RD .

ASTROPHYSICAL JOURNAL, 1985, 295 (02) :358-367

[8] MOJAVE: MONITORING OF JETS IN ACTIVE GALACTIC NUCLEI WITH VLBA EXPERIMENTS. V. MULTI-EPOCH VLBA IMAGES [J].

Lister, M. L. ;

Aller, H. D. ;

Aller, M. F. ;

Cohen, M. H. ;

Homan, D. C. ;

Kadler, M. ;

Kellermann, K. I. ;

Kovalev, Y. Y. ;

Ros, E. ;

Savolainen, T. ;

Zensus, J. A. ;

Vermeulen, R. C. .

ASTRONOMICAL JOURNAL, 2009, 137 (03) :3718-3729

[9] MOJAVE: Monitoring of jets in active galactic nuclei with VLBA experiments. I. First-epoch 15 GHz linear polarization images [J].

Lister, ML ;

Homan, DC .

ASTRONOMICAL JOURNAL, 2005, 130 (04) :1389-1417

[10]

Lobanov AP, 2000, ASTRON ASTROPHYS, V364, P391

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