A Candidate Dual Active Galactic Nucleus At Z=1.175

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dc.contributor.utaustinauthorComerford, Julia M.en_US
dc.creatorBarrows, R. Scotten_US
dc.creatorStern, Danielen_US
dc.creatorMadsen, Kristinen_US
dc.creatorHarrison, Fionaen_US
dc.creatorAssef, Roberto J.en_US
dc.creatorComerford, Julia M.en_US
dc.creatorCushing, Michael C.en_US
dc.creatorFassnacht, Christopher D.en_US
dc.creatorGonzalez, Anthony H.en_US
dc.creatorGriffith, Rogeren_US
dc.creatorHickox, Ryanen_US
dc.creatorKirkpatrick, J. Davyen_US
dc.creatorLagattuta, David J.en_US
dc.date.accessioned2016-04-28T19:42:52Z
dc.date.available2016-04-28T19:42:52Z
dc.date.issued2012-01en
dc.description.abstractThe X-ray source CXOXBJ142607.6+353351 (CXOJ1426+35), which was identified in a 172 ks Chandra image in the Bootes field, shows double-peaked rest-frame optical/UV emission lines, separated by 0.''69 (5.5 kpc) in the spatial dimension and by 690 km s(-1) in the velocity dimension. The high excitation lines and emission line ratios indicate both systems are ionized by an active galactic nucleus (AGN) continuum, and the double-peaked profile resembles that of candidate dual AGNs. At a redshift of z = 1.175, this source is the highest redshift candidate dual AGN yet identified. However, many sources have similar emission line profiles for which other interpretations are favored. We have analyzed the substantial archival data available in this field as well as acquired near-infrared (NIR) adaptive optics (AO) imaging and NIR slit spectroscopy. The X-ray spectrum is hard, implying a column density of several 10(23) cm(-2). Though heavily obscured, the source is also one of the brightest in the field, with an absorption-corrected 2-10 keV luminosity of similar to 10(45) erg s(-1). Outflows driven by an accretion disk may produce the double-peaked lines if the central engine accretes near the Eddington limit. However, we may be seeing the narrow line regions of two AGNs following a galactic merger. While the AO image reveals only a single source, a second AGN would easily be obscured by the significant extinction inferred from the X-ray data. Understanding the physical processes producing the complex emission line profiles seen in CXOJ1426+35 and related sources is important for interpreting the growing population of dual AGN candidates.en_US
dc.description.departmentAstronomyen_US
dc.description.sponsorshipNational Science Foundation AST-0708490en_US
dc.description.sponsorshipStrategic University Research Partnership Programen_US
dc.description.sponsorshipNational Aeronautics and Space Administrationen_US
dc.description.sponsorshipW. M. Keck Foundationen_US
dc.description.sponsorshipSmithsonian Astrophysical Observatory SV4-74018, A31en_US
dc.identifierdoi:10.15781/T25J85
dc.identifier.Filename2012_01_candidatedualactive.pdfen_US
dc.identifier.citationBarrows, R. Scott, Daniel Stern, Kristin Madsen, Fiona Harrison, Roberto J. Assef, Julia M. Comerford, Michael C. Cushing et al. "A Candidate Dual Active Galactic Nucleus at z= 1.175." The Astrophysical Journal, Vol. 744, No. 1 (Jan., 2012): 7.en_US
dc.identifier.doi10.1088/0004-637x/744/1/7en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/2152/35158
dc.language.isoEnglishen_US
dc.relation.ispartofen_US
dc.relation.ispartofserialAstrophysical Journalen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.rights.restrictionOpenen_US
dc.subjectgalaxies: activeen_US
dc.subjectgalaxies: individual (cxoxbj142607.6+353351)en_US
dc.subjectgalaxies: nucleien_US
dc.subjectquasars: emission linesen_US
dc.subjectnarrow-line regionen_US
dc.subjectblack-hole binariesen_US
dc.subjectdigital-sky-surveyen_US
dc.subjectdouble-peaked emitteren_US
dc.subjectquasar sdss j092712.65+294344.0en_US
dc.subjectredshift radioen_US
dc.subjectgalaxiesen_US
dc.subjectwide-field surveyen_US
dc.subjectx-ray sourceen_US
dc.subjectemission-linesen_US
dc.subjectbootes-fielden_US
dc.subjectastronomy & astrophysicsen_US
dc.titleA Candidate Dual Active Galactic Nucleus At Z=1.175en_US
dc.typeArticleen_US

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