Author Topic: Dual/Triple AGNs (found by astronomers)  (Read 18989 times)

zutopian

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #45 on: October 22, 2013, 01:02:48 pm »
Warning: this topic has not been posted in for at least 120 days.

Recently submitted paper:

The Inner Kiloparsec of Mrk 273 with Keck Adaptive Optics
Vivian U (1,9), Anne Medling (2), David Sanders (1), Claire Max (2), Lee Armus (3), Kazushi Iwasawa (4), Aaron Evans (5, 6), Lisa Kewley (1, 7), Giovanni Fazio (8 )
Quote
This lends support to a scenario in which Mrk 273 may be a dual AGN system.
http://arxiv.org/abs/1307.8440

zutopian

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #46 on: January 12, 2014, 05:40:50 am »
Dual Supermassive Black Hole Candidates in the AGN and Galaxy Evolution Survey
Julia M. Comerford, Kyle Schluns, Jenny E. Greene, Richard J. Cool
(Submitted on 9 Sep 2013)
http://arxiv.org/abs/1309.2284

zutopian

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #47 on: January 12, 2014, 05:45:50 am »
A Close Nuclear Black Hole Pair in the Spiral Galaxy NGC 3393
Quote
Here we report the presence of two active MBHs, separated by ~430 light-years, in the Seyfert galaxy NGC 3393.
G. Fabbiano, Wang Junfeng, M. Elvis, G. Risaliti
(Submitted on 2 Sep 2011)
http://arxiv.org/abs/1109.0483

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #48 on: January 12, 2014, 05:48:27 am »
Witnessing the key early phase of quasar evolution: an obscured AGN pair in the interacting galaxy IRAS 20210+1121
E. Piconcelli, C. Vignali, S. Bianchi, S. Mathur, F. Fiore, M. Guainazzi, G. Lanzuisi, R. Maiolino, F. Nicastro
(Submitted on 24 Aug 2010)
http://arxiv.org/abs/1008.3987

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #49 on: January 12, 2014, 05:51:20 am »
Subaru Adaptive-optics High-spatial-resolution Infrared K- and L'-band Imaging Search for Deeply Buried Dual AGNs in Merging Galaxies
Masatoshi Imanishi (1), Yuriko Saito (2) ((1) Subaru/NAOJ/GUAS, (2) GUAS/Subaru/NAOJ)
(Submitted on 6 Dec 2013)
http://arxiv.org/abs/1312.2031

zutopian

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #50 on: January 12, 2014, 06:09:04 am »
A sub-kpc-scale binary active galactic nucleus with double narrow-line regions
Woo, Jong-Hak; Cho, Hojin; Husemann, Bernd; Komossa, S.; Park, Daeseong; Bennert, Vardha N.
Publication Date: 01/2014
http://mnras.oxfordjournals.org/content/437/1/32

EDIT:

http://arxiv.org/abs/1401.3042
(Submitted on 14 Jan 2014)
« Last Edit: January 15, 2014, 06:28:03 am by zutopian »

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #51 on: January 12, 2014, 06:43:52 am »
A Compact Supermassive Binary Black Hole System
Quote
These results are based upon recent multi-frequency observations using the Very Long Baseline Array (VLBA) which reveal two compact, variable, flat-spectrum, active nuclei within the elliptical host galaxy of 0402+379.
C. Rodriguez (1 and 2), G. B. Taylor (1 and 3), R. T. Zavala (4), A. B. Peck (5), L. K. Pollack (6), R. W. Romani (7) ((1) University of New Mexico, (2) Universidad Simon Bolivar, (3) National Radio Astronomy Observatory, (4) United States Naval Observatory, (5) Harvard-Smithsonian CfA, SMA Project, (6) University of California at Santa Cruz, (7) Stanford University)
(Submitted on 3 Apr 2006)
http://arxiv.org/abs/astro-ph/0604042

zutopian

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #52 on: February 05, 2014, 04:52:47 pm »
New paper:

A hunt for dual radio active galactic nuclei in the VLASS
Sarah Burke-Spolaor, Adam Brazier, Shami Chatterjee, Julia Comerford, James Cordes, T. Joseph W. Lazio, Xin Liu, Yue Shen
(Submitted on 3 Feb 2014)
http://arxiv.org/abs/1402.0548

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #53 on: February 05, 2014, 04:58:07 pm »
Chandra: Accepted Cycle 14 Observing Proposals:

Proposal Number: 14700264
Title: X-ray Confirmation of Optically Selected Kpc-Scale Binary AGNs
PI Name: Xin Liu

Proposal Number: 14700279
Title: The Hierarchical Assembly of Massive Black Holes: Identifying Kpc-Scale Triple AGNs with Chandra, HST, and EVLA
PI Name: Xin Liu

Proposal Number: 14700787
Title: Are Double-Peaked Optical Emission Lines Reliable Indicators of Dual AGNs?
PI Name: Claire Max

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Re: Dual/Triple AGNs
« Reply #54 on: February 05, 2014, 05:24:16 pm »

http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587736812593348799

"A Kiloparsec-Scale Binary Active Galactic Nucleus Confirmed by the Expanded Very Large Array"
Authors: Hai Fu, Zhi-Yu Zhang, Roberto J. Assef, Alan Stockton, Adam D. Myers, Lin Yan, S. G. Djorgovski, J. M. Wrobel, Dominik A. Riechers
(Submitted on 31 Aug 2011 (v1), last revised 13 Sep 2011 (this version, v2))
http://arxiv.org/abs/1109.0008

Is listed as one of the targets in a Chandra cycle 14 accepted proposal.:

Proposal Number: 14700787
Title: Are Double-Peaked Optical Emission Lines Reliable Indicators of Dual AGNs?
PI Name: Claire Max


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Re: Dual/Triple AGNs (found by astronomers)
« Reply #55 on: February 15, 2014, 11:30:07 am »
New paper: 

HST and LAMOST discover a dual active galactic nucleus in J0038+4128
Quote
These results thus confirm that J0038+4128 is a Seyfert 1-Seyfert 2 AGN pair.
Y. Huang, X.-W. Liu, H.-B. Yuan, M.-S. Xiang, Z.-Y. Huo, Y.-H. Hou, G. Jin, Y. Zhang, X.-L. Zhou
(Submitted on 12 Feb 2014)
http://arxiv.org/abs/1402.2740

http://skyserver.sdss3.org/public/en/tools/explore/summary.aspx?id=1237659932145877440


« Last Edit: March 06, 2014, 04:56:31 pm by zutopian »

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #56 on: March 06, 2014, 04:53:54 pm »
PKS0347+05: a radio-loud/radio-quiet double AGN system triggered in a major galaxy merger
C. Tadhunter, C. Ramos Almeida, R. Morganti, J. Holt, M. Rose, D. Dicken, K. Inskip
(Submitted on 17 Sep 2012)
http://arxiv.org/abs/1209.3568

http://skyserver.sdss3.org/public/en/tools/explore/summary.aspx?id=1237665374403821653

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #57 on: May 12, 2014, 03:34:51 pm »
Copy from another topic:

SDSS J084905.51+111447.2 1237671124833206352
Triple AGN !



observed on Original observing program:
HST Proposal 13112 - Liu, Xin - University of California - Los Angeles
 The Hierarchical Assembly of Massive Black Holes: Identifying Kpc-Scale Triple AGNs with Chandra, HST, and EVLA - Cycle 20


Instrument: WFC3, Filter/Grating: F336W, Aperture: UVIS2-M1K1C-SUB, Config: WFC3/UVIS

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Re: Dual/Triple AGNs (found by astronomers)
« Reply #58 on: June 20, 2014, 05:15:51 am »
New paper:

A single radio-emitting nucleus in the dual AGN candidate NGC 5515
K.É. Gabányi, S. Frey, T. Xiao, Z. Paragi, T. An, E. Kun, L.Á. Gergely
Quote
The Seyfert galaxy NGC 5515 has double-peaked narrow-line emission in its optical spectrum, and it has been suggested that this could indicate that it has two active nuclei. We observed the source with high resolution Very Long Baseline Interferometry (VLBI) at two radio frequencies, reduced archival Very Large Array data, and re-analysed its optical spectrum. We detected a single, compact radio source at the position of NGC 5515, with no additional radio emission in its vicinity. The optical spectrum of the source shows that the blue and red components of the double-peaked lines have very similar characteristics. While we cannot rule out unambiguously that NGC 5515 harbours a dual AGN, the assumption of a single AGN provides a more plausible explanation for the radio observations and the optical spectrum.
(Submitted on 19 Jun 2014)
http://arxiv.org/abs/1406.5113

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Re: Dual/Triple AGNs
« Reply #59 on: June 27, 2014, 07:31:23 am »

http://cas.sdss.org/dr7/en/tools/explore/obj.asp?id=587736812593348799

"A Kiloparsec-Scale Binary Active Galactic Nucleus Confirmed by the Expanded Very Large Array"
Authors: Hai Fu, Zhi-Yu Zhang, Roberto J. Assef, Alan Stockton, Adam D. Myers, Lin Yan, S. G. Djorgovski, J. M. Wrobel, Dominik A. Riechers
(Submitted on 31 Aug 2011 (v1), last revised 13 Sep 2011 (this version, v2))
http://arxiv.org/abs/1109.0008

They found out, that it is a triple AGN!

New paper:

A close-pair binary in a distant triple supermassive black-hole system
R. P. Deane (1,2), Z. Paragi (3), M. J. Jarvis (4,5), M. Coriat (1,2), G. Bernardi (2,6,7), R. P. Fender (4), S. Frey (8 ), I. Heywood (9,6), H.-R. Klöckner (10), K. Grainge (11), C. Rumsey (12)
Quote
Galaxies are believed to evolve through merging, which should lead to multiple supermassive black holes in some. There are four known triple black hole systems, with the closest pair being 2.4 kiloparsecs apart (the third component is more distant at 3 kiloparsecs), which is far from the gravitational sphere of influence of a black hole with mass ∼109 M⊙ (about 100 parsecs). Previous searches for compact black hole systems concluded that they were rare, with the tightest binary system having a separation of 7 parsecs. Here we report observations of a triple black hole system at redshift z=0.39, with the closest pair separated by ∼140 parsecs.(...)
(Submitted on 24 Jun 2014)
http://arxiv.org/abs/1406.6365