Star Formation Suppression in Compact Group Galaxies: A New Path to Quenching?

Creators: Alatalo, K.; Appleton, P. N.; Lisenfeld, U.; Bitsakis, T.; Lanz, L.; Lacy, M.; Charmandaris, V.; Cluver, M.; Dopita, M. A.; Guillard, P.; Jarrett, T.; Kewley, L. J.; Nyland, K.; Ogle, P. M.; Rasmussen, J.; Rich, J. A.; Verdes-Montenegro, L.; Xu, C. K.; Yun, M.

Abstract

We present CO(1–0) maps of 12 warm H_2-selected Hickson Compact Groups (HCGs), covering 14 individually imaged warm H_2 bright galaxies, with the Combined Array for Research in Millimeter Astronomy. We found a variety of molecular gas distributions within the HCGs, including regularly rotating disks, bars, rings, tidal tails, and possibly nuclear outflows, though the molecular gas morphologies are more consistent with spirals and early-type galaxies than mergers and interacting systems. Our CO-imaged HCG galaxies, when plotted on the Kennicutt–Schmidt relation, shows star formation (SF) suppression of〈

Additional Information

© 2015. The American Astronomical Society. Received 2015 July 18; accepted 2015 September 18; published 2015 October 14. We thank Laure Ciesla for lending her advice and cigale expertise in our investigation of the SF uncertainties, as well as Philip Chang for prescient advice on the theoretical grounding of the energy budget. We also thank the anonymous referee for a useful and insightful report. Partial support was provided to K.A., T.B., and P.A. by NASA observations through a contract issued by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Additional support for K.A. is provided by NASA through Hubble Fellowship grant #HST-HF2-51352.001 awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS5-26555. U.L. acknowledges support by the research projects. AYA2011-24728 from the Spanish Ministerio de Ciencia y Educación and the Junta de Andalucía (Spain) grants FQM108. T.B. and V.C. would like to acknowledge partial support from the EU FP7 Grant PIRSES-GA-2012-316788. T.B. acknowledges support from DGAPA-UNAM postdoctoral fellowships. L.V.M. work has been supported by grant AYA2011-30491-C02-01 co-financed by MICINN and FEDER funds, and the Junta de Andaluci´a (Spain) grants P08-FQM-4205 and TIC-114. Support for CARMA construction was derived from the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the James S. McDonnell Foundation, the Associates of the California Institute of Technology, the University of Chicago, the states of California, Illinois, and Maryland, and the National Science Foundation. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. The work is also based, in part, on observations made with Herschel, a European Space Agency Cornerstone Mission with significant participation by NASA. This research has 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. We acknowledge the usage of the HyperLeda database (http://leda.univ-lyon1.fr). Facilities: CARMA - Combined Array for Research in Millimeter-Wave Astronomy, Herschel - European Space Agency's Herschel space observatory, WISE. - Wide-field Infrared Survey Explorer

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