期刊
ASTROPHYSICAL JOURNAL
卷 827, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/0004-637X/827/2/106
关键词
galaxies: active; galaxies: evolution; galaxies: interactions; galaxies: ISM; galaxies: star formation; radio lines: galaxies
资金
- NASA through Hubble Fellowship grant - Space Telescope Science Institute [HST-HF2-51352.001]
- NASA [NAS5-26555]
- Spanish Ministerio de Economia y Competividad [AYA2011-24728, AYA2014-53506-P]
- FEDER (Fondo Europeo de Desarrollo Regional)
- Junta de Andalucia (Spain) grants [FQM108]
- Herschel, a European Space Agency Cornerstone Mission
- ALMA-CONICYT program [31110020]
- NASA through the Spitzer Space Telescope
- Australian Research Council (ARC) through Discovery project [DP130103925]
- INSU/CNRS (France)
- MPG (Germany)
- IGN (Spain)
- Gordon and Betty Moore Foundation
- Kenneth T. and Eileen L. Norris Foundation
- James S. McDonnell Foundation
- Associates of the California Institute of Technology
- University of Chicago
- states of California, Illinois, and Maryland
- National Science Foundation
- National Science Foundation under a cooperative agreement
- CARMA partner universities
- National Aeronautics and Space Administration
We present CO(1-0) observations of objects within the Shocked POststarburst Galaxy Survey taken with the Institut de Radioastronomie Millimetrique 30 m single dish and the Combined Array for Research for Millimeter Astronomy interferometer. Shocked poststarburst galaxies (SPOGs) represent a transitioning population of galaxies, with deep Balmer absorption (EWH delta > 5 angstrom), consistent with an intermediate-age (A-star) stellar population, and ionized gas line ratios inconsistent with pure star formation. The CO(1-0) subsample was selected from SPOGs detected by the Wide-field Infrared Survey Explorer with 22 mu m flux detected at a signal-to-noise ratio. (S/N) > 3. Of the 52 objects observed in CO(1-0), 47 are detected with S/N > 3. A large fraction (37%-46% +/- 7%) of our CO-SPOG sample were visually classified as morphologically disrupted. The H-2 masses detected were between 10(8.7-10.8) M-circle dot, consistent with the gas masses found in normal galaxies, though approximately an order of magnitude larger than the range seen in poststarburst galaxies. When comparing the 22 mu m and CO(1-0) fluxes, SPOGs diverge from the normal star-forming relation, having 22 mu m fluxes in excess of the relation by a factor of = 4.91(-0.39)(+0.42), suggestive of the presence of active galactic nuclei (AGNs). The Na I D characteristics of CO-SPOGs show that it is likely that many of these objects host interstellar winds. Objects with. large Na I D enhancements also tend to emit in the radio, suggesting possible AGN. driving of neutral winds.
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