INVESTIGATING THE NUCLEAR ACTIVITY OF BARRED SPIRAL GALAXIES: THE CASE OF NGC 1672

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dc.contributor.authorJenkins, L. P.
dc.contributor.authorBrandt, W. N.
dc.contributor.authorColbert, E. J. M.
dc.contributor.authorKoribalski, B.
dc.contributor.authorKuntz, K. D.
dc.contributor.authorLevan, A. J.
dc.contributor.authorOjha, R.
dc.contributor.authorRoberts, T. P.
dc.contributor.authorWard, M. J.
dc.contributor.authorZezas, A.
dc.date.accessioned2020-04-17T13:15:44Z
dc.date.available2020-04-17T13:15:44Z
dc.date.issued2011-06-10
dc.description.abstractWe have performed an X-ray study of the nearby barred spiral galaxy NGC 1672, primarily to ascertain the effect of the bar on its nuclear activity. We use both Chandra and XMM-Newton observations to investigate its X-ray properties, together with supporting high-resolution optical imaging data from the Hubble Space Telescope (HST), infrared imaging from the Spitzer Space Telescope, and Australia Telescope Compact Array ground-based radio data. We detect 28 X-ray sources within the D₂₅ area of the galaxy; many are spatially correlated with star formation in the bar and spiral arms, and two are identified as background galaxies in the HST images. Nine of the X-ray sources are ultraluminous X-ray sources, with the three brightest (LX > 5 × 10³⁹ erg s⁻¹) located at the ends of the bar. With the spatial resolution of Chandra, we are able to show for the first time that NGC 1672 possesses a hard (Γ ~ 1.5) nuclear X-ray source with a 2-10 keV luminosity of 4 × 10³⁸ erg s⁻¹. This is surrounded by an X-ray-bright circumnuclear star-forming ring, comprised of point sources and hot gas, which dominates the 2-10 keV emission in the central region of the galaxy. The spatially resolved multiwavelength photometry indicates that the nuclear source is a low-luminosity active galactic nucleus (LLAGN), but with star formation activity close to the central black hole. A high-resolution multiwavelength survey is required to fully assess the impact of both large-scale bars and smaller-scale phenomena such as nuclear bars, rings, and nuclear spirals on the fueling of LLAGN.en_US
dc.description.sponsorshipWe thank the referee for helpful comments that have improved the manuscript. L.P.J. acknowledges funding for the majority of this project from the NASA Postdoctoral Fellowship Program. W.N.B. acknowledges NASA ADP grant NNX10AC99G. This research has made use of software provided by the Chandra X-ray Center (CXC), which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-03060. The XMM-Newton observatory is an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA. Observations made with the NASA/ESA Hubble Space Telescope were obtained from the data archive at the Space Telescope Institute. STScI is operated by the association of Universities for Research in Astronomy, Inc. under the NASA contract NAS 5-26555. The Spitzer Space Telescope is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. The Australia Telescope Compact Array is part of the Australia Telescope which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA.en_US
dc.description.urihttps://iopscience.iop.org/article/10.1088/0004-637X/734/1/33en_US
dc.format.extent20 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2ui6z-v8ho
dc.identifier.citationJenkins L. P, Brandt W. N, Colbert E. J. M, Koribalski B, Kuntz K. D, Levan A. J, Ojha R, Roberts T. P, Ward M. J, Zezas A, INVESTIGATING THE NUCLEAR ACTIVITY OF BARRED SPIRAL GALAXIES: THE CASE OF NGC 1672, https://iopscience.iop.org/article/10.1088/0004-637X/734/1/33en_US
dc.identifier.urihttp://hdl.handle.net/11603/18080
dc.identifier.urihttp://simbad.u-strasbg.fr/simbad/sim-ref?querymethod=bib&simbo=on&submit=submit+bibcode&bibcode=2011ApJ...734...33J
dc.identifier.urihttps://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Search&refcode=2011ApJ...734...33J
dc.identifier.urihttps://ui.adsabs.harvard.edu/link_gateway/2011ApJ...734...33J/XMM
dc.identifier.urihttps://archive.stsci.edu/mastbibref.php?bibcode=2011ApJ...734...33J
dc.identifier.urihttps://heasarc.gsfc.nasa.gov/xamin/xamin.jsp?bibcode=2011ApJ%2E%2E%2E734%2E%2E%2E33J
dc.identifier.urihttps://ui.adsabs.harvard.edu/link_gateway/2011ApJ...734...33J/ESA
dc.identifier.urihttps://ui.adsabs.harvard.edu/link_gateway/2011ApJ...734...33J/Chandra
dc.language.isoen_USen_US
dc.publisherIOPen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.relation.ispartofUMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rights© 2011. The American Astronomical Society. All rights reserved.
dc.titleINVESTIGATING THE NUCLEAR ACTIVITY OF BARRED SPIRAL GALAXIES: THE CASE OF NGC 1672en_US
dc.typeTexten_US

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