THE SPATIALLY RESOLVED [C II]COOLING LINE DEFICIT in GALAXIES
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Smith, J. D.; Croxall, K V; Draine, Bruce T; Looze, Ilse De; Sandstrom, Karin M.; Armus, Lee; Beirao, P.; Bolatto, Alberto; Groves, Brent Allan; Dale, Daniel A; Helou, George; Walter, Fabian; Wolfire, M.
Description
We present [C ii] 158 μm measurements from over 15,000 resolved regions within 54 nearby galaxies of the Kingfish program to investigate the so-called [C ii] "line-cooling deficit" long known to occur in galaxies with different luminosities. The [C ii]/TIR ratio ranges from above 1% to below 0.1% in the sample, with a mean value of 0.48 ± 0.21%. We find that the surface density of 24 μm emission dominates this trend, with [C ii]/TIR dropping as vIv (24 μm)increases. Deviations from this overall...[Show more]
dc.contributor.author | Smith, J. D. | |
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dc.contributor.author | Croxall, K V | |
dc.contributor.author | Draine, Bruce T | |
dc.contributor.author | Looze, Ilse De | |
dc.contributor.author | Sandstrom, Karin M. | |
dc.contributor.author | Armus, Lee | |
dc.contributor.author | Beirao, P. | |
dc.contributor.author | Bolatto, Alberto | |
dc.contributor.author | Groves, Brent Allan | |
dc.contributor.author | Dale, Daniel A | |
dc.contributor.author | Helou, George | |
dc.contributor.author | Walter, Fabian | |
dc.contributor.author | Wolfire, M. | |
dc.date.accessioned | 2020-12-20T20:58:14Z | |
dc.date.available | 2020-12-20T20:58:14Z | |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | http://hdl.handle.net/1885/218528 | |
dc.description.abstract | We present [C ii] 158 μm measurements from over 15,000 resolved regions within 54 nearby galaxies of the Kingfish program to investigate the so-called [C ii] "line-cooling deficit" long known to occur in galaxies with different luminosities. The [C ii]/TIR ratio ranges from above 1% to below 0.1% in the sample, with a mean value of 0.48 ± 0.21%. We find that the surface density of 24 μm emission dominates this trend, with [C ii]/TIR dropping as vIv (24 μm)increases. Deviations from this overall decline are correlated with changes in the gas-phase metal abundance, with higher metallicity associated with deeper deficits at a fixed surface brightness. We supplement the local sample with resolved [C ii] measurements from nearby luminous infrared galaxies and high-redshift sources from z = 1.8-6.4, and find that star formation rate density drives a continuous trend of deepening [C ii] deficit across six orders of magnitude in ΣSFR. The tightness of this correlation suggests that an approximate can be estimated directly from global measurements of [C ii]/TIR, and a relation is provided to do so. Several low-luminosity active galactic nucleus (AGN) hosts in the sample show additional and significant central suppression of [C ii]/TIR, but these deficit enhancements occur not in those AGNs with the highest X-ray luminosities, but instead those with the highest central starlight intensities. Taken together, these results demonstrate that the [C ii] line-cooling line deficit in galaxies likely arises from local physical phenomena in interstellar gas | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_AU | |
dc.publisher | IOP Publishing | |
dc.source | The Astrophysical Journal | |
dc.title | THE SPATIALLY RESOLVED [C II]COOLING LINE DEFICIT in GALAXIES | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 834 | |
dc.date.issued | 2017 | |
local.identifier.absfor | 020103 - Cosmology and Extragalactic Astronomy | |
local.identifier.ariespublication | a383154xPUB6361 | |
local.type.status | Published Version | |
local.contributor.affiliation | Smith, J. D., University of Toledo | |
local.contributor.affiliation | Croxall, K V, Ohio State University | |
local.contributor.affiliation | Draine, Bruce T, Princeton University | |
local.contributor.affiliation | Looze, Ilse De, Universiteit Gent, Sterrenkundig Observatorium | |
local.contributor.affiliation | Sandstrom, Karin M., University of San Diego | |
local.contributor.affiliation | Armus, Lee, Spitzer Science Center, Caltech | |
local.contributor.affiliation | Beirao, P., Observatoire de Paris | |
local.contributor.affiliation | Bolatto, Alberto, University of Maryland | |
local.contributor.affiliation | Groves, Brent Allan, College of Science, ANU | |
local.contributor.affiliation | Dale, Daniel A, University of Wyoming | |
local.contributor.affiliation | Helou, George, California Institute of Technology | |
local.contributor.affiliation | Walter, Fabian, Max Planck Institute for Astronomy | |
local.contributor.affiliation | Wolfire, M., University of Maryland | |
local.bibliographicCitation.issue | 1 | |
local.identifier.doi | 10.3847/1538-4357/834/1/5 | |
dc.date.updated | 2020-11-23T11:20:46Z | |
local.identifier.scopusID | 2-s2.0-85010028177 | |
local.identifier.thomsonID | 000391573000005 | |
Collections | ANU Research Publications |
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