CHANDRA OBSERVATIONS OF GALAXY ZOO MERGERS: FREQUENCY OF BINARY ACTIVE NUCLEI IN MASSIVE MERGERS

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dc.contributor.authorTeng, Stacy H.
dc.contributor.authorSchawinski, Kevin
dc.contributor.authorUrry, C. Megan
dc.contributor.authorDarg, Dan W.
dc.contributor.authorKaviraj, Sugata
dc.contributor.authorOh, Kyuseok
dc.contributor.authorBonning, Erin W.
dc.contributor.authorCardamone, Carolin N.
dc.contributor.authorKeel, William C.
dc.contributor.authorLintott, Chris J.
dc.contributor.authorSimmons, Brooke D.
dc.contributor.authorTreister, Ezequiel
dc.contributor.otherNational Aeronautics & Space Administration (NASA)
dc.contributor.otherNASA Goddard Space Flight Center
dc.contributor.otherUniversity System of Maryland
dc.contributor.otherUniversity of Maryland College Park
dc.contributor.otherYale University
dc.contributor.otherUniversity of Oxford
dc.contributor.otherYonsei University
dc.contributor.otherBrown University
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherUniversidad de Concepcion
dc.date.accessioned2018-09-18T21:51:06Z
dc.date.available2018-09-18T21:51:06Z
dc.date.issued2012-07-10
dc.description.abstractWe present the results from a Chandra pilot study of 12 massive galaxy mergers selected from Galaxy Zoo. The sample includes major mergers down to a host galaxy mass of 10(11) M-circle dot that already have optical active galactic nucleus (AGN) signatures in at least one of the progenitors. We find that the coincidences of optically selected active nuclei with mildly obscured (N-H less than or similar to 1.1 x 10(22) cm(-2)) X-ray nuclei are relatively common (8/12), but the detections are too faint (<40 counts per nucleus; f(2-10 keV) less than or similar to 1.2 x 10(-13) erg s(-1) cm(-2)) to reliably separate starburst and nuclear activity as the origin of the X-ray emission. Only one merger is found to have confirmed binary X-ray nuclei, though the X-ray emission from its southern nucleus could be due solely to star formation. Thus, the occurrences of binary AGNs in these mergers are rare (0%-8%), unless most merger-induced active nuclei are very heavily obscured or Compton thick.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationTeng, S. et al. (2012): Chandra Observations of Galaxy Zoo Mergers: Frequency of Binary Active Nuclei in Massive Mergers. The Astronomical Journal, 753(2). DOI: https://doi.org/10.1088/0004-637X/753/2/165
dc.identifier.doi10.1088/0004-637X/753/2/165
dc.identifier.orcidhttps://orcid.org/0000-0002-0745-9792
dc.identifier.orcidhttps://orcid.org/0000-0001-5464-0888
dc.identifier.orcidhttps://orcid.org/0000-0002-5037-951X
dc.identifier.orcidhttps://orcid.org/0000-0001-7568-6412
dc.identifier.orcidhttps://orcid.org/0000-0001-5882-3323
dc.identifier.orcidhttps://orcid.org/0000-0002-5601-575X
dc.identifier.urihttp://ir.ua.edu/handle/123456789/3906
dc.languageEnglish
dc.language.isoen_US
dc.publisherIOP Publishing
dc.subjectgalaxies: active
dc.subjectX-rays: galaxies
dc.subjectSUPERMASSIVE BLACK-HOLES
dc.subjectSTAR-FORMATION RATE
dc.subjectDIGITAL-SKY-SURVEY
dc.subjectULTRALUMINOUS INFRARED GALAXIES
dc.subjectX-RAY
dc.subjectGALACTIC NUCLEUS
dc.subjectHOST GALAXIES
dc.subjectMERGING GALAXIES
dc.subjectNEARBY UNIVERSE
dc.subjectMORPHOLOGIES
dc.subjectAstronomy & Astrophysics
dc.titleCHANDRA OBSERVATIONS OF GALAXY ZOO MERGERS: FREQUENCY OF BINARY ACTIVE NUCLEI IN MASSIVE MERGERSen_US
dc.typetext
dc.typeArticle
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