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C-GOALS: Chandra observations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey

Iwasawa, K. and Sanders, D. B. and Teng, S. H. and U, V. and Armus, L. and Evans, A. S. and Howell, J. H. and Komossa, S. and Mazzarella, J. M. and Petric, A. O. and Surace, J. A. and Vavilkin, T. and Veilleux, S. and Trentham, N. (2011) C-GOALS: Chandra observations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey. Astronomy and Astrophysics, 529 . A106. ISSN 0004-6361.

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We present X-ray data for a complete sample of 44 luminous infrared galaxies (LIRGs), obtained with the Chandra X-ray Observatory. These are the X-ray observations of the high luminosity portion of the Great Observatory All-sky LIRG Survey (GOALS), which includes the most luminous infrared selected galaxies, log (L_(ir)/L_⊙) ≥ 11.73, in the local universe, z ≤ 0.088. X-rays were detected from 43 out of 44 objects, and their arcsec-resolution images, spectra, and radial brightness distributions are presented. With a selection by hard X-ray colour and the 6.4 keV iron line, AGN are found in 37% of the objects, with higher luminosity sources more likely to contain an AGN. These AGN also tend to be found in late-stage mergers. The AGN fraction would increase to 48% if objects with [Ne v]λ14.3 μm detection are included. Double AGN are clearly detected only in NGC 6240 among 24 double/triple systems. Other AGN are found either in single nucleus objects or in one of the double nuclei at similar rates. Objects without conventional X-ray signatures of AGN appear to be hard X-ray quiet, relative to the X-ray to far-IR correlation for starburst galaxies, as discussed elsewhere. Most objects also show extended soft X-ray emission, which is likely related to an outflow from the nuclear region, with a metal abundance pattern suggesting enrichment by core collapse supernovae, as expected for a starburst.

Item Type:Article
Related URLs:
URLURL TypeDescription
Iwasawa, K.0000-0002-4923-3281
Sanders, D. B.0000-0002-1233-9998
U, V.0000-0002-1912-0024
Armus, L.0000-0003-3498-2973
Evans, A. S.0000-0003-2638-1334
Mazzarella, J. M.0000-0002-8204-8619
Petric, A. O.0000-0003-4030-3455
Surace, J. A.0000-0001-7291-0087
Veilleux, S.0000-0002-3158-6820
Additional Information:© 2011 ESO. Article published by EDP Sciences. Received 23 June 2010; Accepted 25 February 2011. Published online 12 April 2011. This research has made use of software packages CIAO provided by the Chandra X-ray Center (CXC) and FTOOLS provided by NASAS’s HEASARC. This research has also made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. The Chandra data archive is maintained by the Chandra X-ray Center at the Smithsonian Astrophysical Observatory. D.B.S. acknowledges support from Chandra grants GO6-7098X and GO7-8108A. Vivian U also acknowledges support from a NASA Jenkins Predoctoral Fellowship and a SAO Harvard-Smithsonian Predoctoral Fellowship. We thank the referee for helpful comments.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NASA Harriet G. Jenkins Predoctoral FellowshipUNSPECIFIED
Smithsonian Astrophysical ObservatoryUNSPECIFIED
Subject Keywords:infrared: galaxies; X-rays: galaxies; galaxies: active; galaxies: starburst
Record Number:CaltechAUTHORS:20110429-103611393
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Official Citation:C-GOALS: Chandra observations of a complete sample of luminous infrared galaxies from the IRAS Revised Bright Galaxy Survey K. Iwasawa, D. B. Sanders, S. H. Teng, V. U, L. Armus, A. S. Evans, J. H. Howell, S. Komossa, J. M. Mazzarella, A. O. Petric, J. A. Surace, T. Vavilkin, S. Veilleux and N. Trentham A&A 529 A106 (2011) DOI: 10.1051/0004-6361/201015264
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23499
Deposited By: Jason Perez
Deposited On:29 Apr 2011 22:32
Last Modified:09 Mar 2020 13:19

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