Author Topic: Dual/Triple AGNs (found by astronomers)  (Read 20048 times)

zutopian

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Re: Dual/Triple AGNs
« Reply #15 on: November 04, 2011, 10:08:23 am »
Quote
Finally, we find a marked increase at small projected separations of the fraction of pairs in which BOTH galaxies harbour AGN. We demonstrate that the fraction of double AGN exceeds the expected random fraction, indicating that some pairs undergo correlated nuclear activity.

"Galaxy pairs in the Sloan Digital Sky Survey - IV: Interactions trigger AGN"
Authors: Sara L. Ellison, David R. Patton, J. Trevor Mendel, Jillian M. Scudder
(Submitted on 12 Aug 2011)
http://arxiv.org/abs/1108.2711

zutopian

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Re: Dual/Triple AGNs
« Reply #16 on: November 04, 2011, 10:48:08 am »
"A systematic search for massive black hole binaries in SDSS spectroscopic sample"
Authors: P. Tsalmantza, R. Decarli, M. Dotti, David W. Hogg
(Submitted on 6 Jun 2011)
http://arxiv.org/abs/1106.1180

zutopian

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Re: Dual/Triple AGNs
« Reply #17 on: November 20, 2011, 05:28:17 am »
"Kiloparsec-scale Spatial Offsets in Double-peaked Narrow-line AGNs. I. Markers for Selection of Compelling Dual AGN Candidates"
Authors: Julia M. Comerford, Brian F. Gerke, Daniel Stern, Michael C. Cooper, Benjamin J. Weiner, Jeffrey A. Newman, Fiona Harrison, Kristin Madsen, R. Scott Barrows
Quote
Using these criteria, we determine the 17 most compelling dual AGN candidates in our sample.
(Submitted on 11 Nov 2011)
http://arxiv.org/abs/1111.2862

Note to myself:Interestingly, Authors Julia M. Comerford, Brian F. Gerke and others

Alice

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Re: Dual/Triple AGNs
« Reply #18 on: November 20, 2011, 05:57:24 am »
Cool . . . ;D

zutopian

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Re: Dual/Triple AGNs
« Reply #19 on: November 20, 2011, 06:14:56 am »
Cool . . . ;D

So you might want to write some OOTDs.
« Last Edit: November 20, 2011, 07:18:36 am by zutopian »

Alice

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Re: Dual/Triple AGNs
« Reply #20 on: November 20, 2011, 05:01:52 pm »
Cool . . . ;D

So you might want to write some OOTDs.

A good suggestion . . . Send me or JeanTate some nominations if you have anything special in mind . . . ;D ;D

zutopian

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Re: Dual/Triple AGNs
« Reply #21 on: November 21, 2011, 01:20:50 pm »
"A Large Systematic Search for Recoiling and Close Supermassive Binary Black Holes"
Michael Eracleous, Todd A. Boroson, Jules P. Halpern, Jia Liu
(Submitted on 15 Jun 2011)
http://arxiv.org/abs/1106.2952

zutopian

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Re: Dual/Triple AGNs
« Reply #22 on: November 23, 2011, 06:45:46 am »
"A Candidate Dual AGN at z=1.175"
Authors: R. Scott Barrows, Daniel Stern, Kristin Madsen, Fiona Harrison, Roberto J. Assef, Julia M. Comerford, Michael C. Cushing, Christopher D. Fassnacht, Anthony Gonzalez, Roger Griffith, Ryan Hickox, J. Davy Kirkpatrick, David J. Lagattuta
(Submitted on 15 Sep 2011)
http://arxiv.org/abs/1109.3469

zutopian

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Re: Dual/Triple AGNs
« Reply #23 on: December 18, 2011, 07:42:14 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
« Last Edit: December 18, 2011, 07:48:25 am by zutopian »

zutopian

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Re: Dual/Triple AGNs
« Reply #24 on: January 18, 2012, 07:50:54 am »
"Understanding Dual AGN Activation in the Nearby Universe"
Authors: Michael Koss, Richard Mushotzky, Ezequiel Treister, Sylvain Veilleux, Ranjan Vasudevan, Margaret Trippe
(Submitted on 13 Jan 2012)
http://arxiv.org/abs/1201.2944

Quote
We study the fraction of dual AGN in a sample of 167 nearby (z<0.05), moderate luminosity, ultra hard X-ray selected AGN from the all-sky Swift BAT survey. Combining new Chandra and Gemini observations together with optical and X-ray observations, we find that the dual AGN frequency at scales <100 kpc is 10% (16/167).

Quote
NGC 6240S NGC 6240N 1.5 1.6 0.51 ? 7 CXO                                   
Mrk 739E Mrk 739W 3.4 0.5 1 C/SF/SF CXO G                                 
Mrk 463E Mrk 463W 3.9 1.2 3.8 AGN/Sy2/Sy2 CXO S               
IRAS 05589+2828 2MASX J06021107+2828382 8 5.7 0.07 AGN/Sy2/Sy2 CXO G
ESO 509-IG 066 NED 02 ESO 509-IG066E 10.5 1.6 0.95 AGN/Sy2/Sy2 XMM 6DF
IRAS 03219+4031 2MASX J03251221+4042021 10.8 2.6 1.3 AGN/Sy2/Sy2 XMM 4 
NGC 3227 NGC 3226 12.3 1.7 0.02 AGN/L/L CXO1                 
NGC 835 NGC 833 14.8 1.5 0.7 SF/L/SF XMM S                         
UGC 11185 NED02 UGC 11185 NED01 22.6 1.3 < 0.9 AGN/Sy2/Sy2 XRT G   
MCG +04-48-002 NGC 6921 25.2 0.4 0.87 Sy2 XMM N
NGC 2992 NGC 2993 25.8 2.7 0.0089 SF/SF/SF XMM 6DF
UGC 8327 NED02 UGC 8327 NED01 26.1 2.8 0.014 AGN/Sy2/Sy2 CXO S                                                             
Mrk 268 MRK 268SE 44 5.5 < 0.23 AGN/Sy2/Sy2 XMM S       
NGC 7679 NGC 7682 77.6 2.3 0.11 Sy2 XMM 5                             
NGC 1052 NGC 1042 83.7 3.3 < 0.0004 C/SF/Sy2 CXO S       
M106 NGC 4220 85.7 12 ? AGN/Sy2/Sy2 1                                     
NGC 835 NGC 839 87 2.1 0.03 AGN/Sy2/? XMM 6                       

zutopian

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Re: Dual/Triple AGNs
« Reply #25 on: January 19, 2012, 10:30:21 am »

WAS 49  587741532253519916

Quote
( 1 ) Was 49 is an interacting system of galaxies containing a Seyfert 2 nucleus in the larger galaxy Was 49a and a hidden Seyfert 1 nucleus in the smaller companion, Was 49b. This object is one of the clearest examples of a double AGN.

"Was 49 - Mirror for a hidden Seyfert 1 nucleus"
Authors: Moran, Edward C.; Halpern, Jules P.; Bothun, Gregory D.; Becker, Robert H.
Astronomical Journal (ISSN 0004-6256), vol. 104, no. 3, Sept. 1992, p. 990-999. (AJ Homepage)
Publication Date: 09/1992
http://adsabs.harvard.edu/cgi-bin/bib_query?1992AJ....104..990M

zutopian

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Re: Dual/Triple AGNs
« Reply #26 on: January 19, 2012, 10:40:24 am »
"The Nature of Double-Peaked [O III] Active Galactic Nuclei"
Authors: Hai Fu, Lin Yan, Adam D. Myers, Alan Stockton, S. G. Djorgovski, G. Aldering, Jeffrey A. Rich
(Submitted on 18 Jul 2011 (v1), last revised 26 Oct 2011 (this version, v2))
Quote
Abstract: Active galactic nuclei (AGNs) with double-peaked [O III] lines are suspected to be sub-kpc or kpc-scale binary AGNs. However, pure gas kinematics can produce the same double-peaked line profile in spatially integrated spectra. Here we combine integral-field spectroscopy and high-resolution imaging of 42 double-peaked [O III] AGNs from Sloan Digital Sky Survey to investigate the constituents of the population. We find two binary AGNs where the line-splitting is driven by the orbital motion of the merging nuclei. Such objects account for only ~2% of the double-peaked AGNs. Almost all (~98%) of the double-peaked AGNs were selected because of gas kinematics; and half of those show spatially resolved narrow-line regions that extend 4-20 kpc from the nuclei. Serendipitously, we find two spectrally unresolved binary AGNs where gas kinematics produced the double-peaked [O III] lines. The relatively frequent serendipitous discoveries indicate that only ~1% of binary AGNs would appear double-peaked in Sloan spectra and 2.2_{-0.8}^{+2.5}% of all Sloan AGNs are binary AGNs. Therefore, the double-peaked sample does not offer much advantage over any other AGN samples in finding binary AGNs. The binary AGN fraction implies an elevated AGN duty cycle (8_{-3}^{+8}%), suggesting galaxy interactions enhance nuclear accretion. We illustrate that integral-field spectroscopy is crucial for identifying binary AGNs: several objects previously classified as "binary AGNs" with long-slit spectra are most likely single AGNs with extended narrow-line regions. The formation of extended narrow-line regions driven by radiation pressure is also discussed.
http://arxiv.org/abs/1107.3564

PS: Is related to the following papers:

"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))

"Spatially-Resolved Spectroscopy of SDSS J0952+2552: a Confirmed Dual AGN"
Authors: R.C. McGurk (UC Santa Cruz), C.E. Max (UC Santa Cruz), D.J. Rosario (MPE), G.A. Shields (UT Austin), K.L. Smith (UT Austin), S.A. Wright (UC Berkeley)
(Submitted on 13 Jul 2011 (v1), last revised 20 Sep 2011 (this version, v2))
« Last Edit: January 19, 2012, 08:10:12 pm by zutopian »

zookeeperKevin

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Re: Dual/Triple AGNs
« Reply #27 on: January 19, 2012, 10:46:36 am »
Great collection!  :)

zutopian

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Re: Dual/Triple AGNs
« Reply #28 on: January 19, 2012, 11:10:16 am »
Great collection!  :)

Thank you for your kind comment!
The collection contains also the paper "Chandra Discovery of a Binary Active Galactic Nucleus in Mrk 739":
I had noticed, that one of the authors are you! Great work!
I would like to add some "Galaxy Zoo Dual AGNs" to the collection:
blog post: http://blogs.zooniverse.org/galaxyzoo/2010/07/16/chandra-program-to-study-galaxy-zoo-mergers-approved/
Looking forward to see the results soon!  :)
« Last Edit: January 28, 2012, 08:40:31 am by zutopian »

zutopian

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Re: Dual/Triple AGNs
« Reply #29 on: January 20, 2012, 10:52:11 pm »
"Type 2 Active Galactic Nuclei with Double-Peaked [OIII] Lines. II. Single AGNs with Complex Narrow-Line Region Kinematics are More Common than Binary AGNs"
Authors: Yue Shen, Xin Liu, Jenny E. Greene, Michael A. Strauss
(Submitted on 23 Nov 2010 (v1), last revised 2 May 2011 (this version, v2))
http://arxiv.org/abs/1011.5246