SIMBAD references

2016ApJ...827..106A - Astrophys. J., 827, 106-106 (2016/August-3)

Shocked POststarburst galaxy survey. II. The molecular gas content and properties of a subset of SPOGs.

ALATALO K., LISENFELD U., LANZ L., APPLETON P.N., ARDILA F., CALES S.L., KEWLEY L.J., LACY M., MEDLING A.M., NYLAND K., RICH J.A. and URRY C.M.

Abstract (from CDS):

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 (EW_{Hδ}\gt 5 A ), 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 µm 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}_☉, 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 µm and CO(1-0) fluxes, SPOGs diverge from the normal star-forming relation, having 22 µm fluxes in excess of the relation by a factor of <ε_{MIR}>={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.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: interactions - galaxies: ISM - galaxies: star formation - radio lines: galaxies - radio lines: galaxies

Simbad objects: 63

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2021.07.30-17:13:25

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