Cold Dust but Warm Gas in the Unusual Elliptical Galaxy NGC 4125

dc.contributor.utaustinauthorCooper, E. Mentuchen_US
dc.creatorWilson, C. D.en_US
dc.creatorCridland, A.en_US
dc.creatorFoyle, K.en_US
dc.creatorParkin, T. J.en_US
dc.creatorCooper, E. Mentuchen_US
dc.creatorRoussel, H.en_US
dc.creatorSauvage, M.en_US
dc.creatorSmith, M. W. L.en_US
dc.creatorBaes, M.en_US
dc.creatorBendo, G.en_US
dc.creatorBoquien, M.en_US
dc.creatorBoselli, A.en_US
dc.creatorCiesla, L.en_US
dc.creatorClements, D. L.en_US
dc.creatorCooray, A.en_US
dc.creatorDe Looze, I.en_US
dc.creatorGalametz, M.en_US
dc.creatorGear, W.en_US
dc.creatorLebouteiller, V.en_US
dc.creatorMadden, S.en_US
dc.creatorPereira-Santaella, M.en_US
dc.creatorRemy-Ruyer, A.en_US
dc.description.abstractData from the Herschel Space Observatory have revealed an unusual elliptical galaxy, NGC 4125, which has strong and extended submillimeter emission from cold dust but only very strict upper limits to its CO and Hi emission. Depending on the dust emissivity, the total dust mass is 2-5 x 10(6) M-circle dot. While the neutral gas-to-dust mass ratio is extremely low (<12-30), including the ionized gas traced by [CII] emission raises this limit to <39-100. The dust emission follows a similar r(1/4) profile to the stellar light and the dust to stellar mass ratio is toward the high end of what is found in nearby elliptical galaxies. We suggest that NGC 4125 is currently in an unusual phase where evolved stars produced in a merger-triggered burst of star Formation are pumping large amounts of gas and dust into the interstellar medium. In this scenario, the low neutral gas-to-dust mass ratio is explained by the gas being heated to temperatures >= 10(4) K faster than the dust is evaporated. If galaxies like NGC 4125, where the far-infrared emission does not trace neutral gas in the usual manner, are common at higher redshift, this could have significant implications for our understanding of high redshift galaxies and galaxy evolution.en_US
dc.description.sponsorshipCanadian Space Agencyen_US
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canadaen_US
dc.description.sponsorshipAgenzia Spaziale Italiana (ASI) I/005/11/0en_US
dc.description.sponsorshipBMVIT (Austria)en_US
dc.description.sponsorshipESA-PRODEX (Belgium)en_US
dc.description.sponsorshipCEA/CNES (France)en_US
dc.description.sponsorshipDLR (Germany)en_US
dc.description.sponsorshipASI/INAF (Italy)en_US
dc.description.sponsorshipCICYT/MCYT (Spain)en_US
dc.description.sponsorshipCSA (Canada)en_US
dc.description.sponsorshipNAOC (China)en_US
dc.description.sponsorshipCEA, (France)en_US
dc.description.sponsorshipCNES (France)en_US
dc.description.sponsorshipCNRS (France)en_US
dc.description.sponsorshipASI (Italy)en_US
dc.description.sponsorshipMCINN (Spain)en_US
dc.description.sponsorshipSNSB (Sweden)en_US
dc.description.sponsorshipSTFC (UK)en_US
dc.description.sponsorshipNASA (USA)en_US
dc.description.sponsorshipNational Aeronautics and Space Administrationen_US
dc.identifier.citationWilson, C. D., A. Cridland, K. Foyle, T. J. Parkin, E. Mentuch Cooper, H. Roussel, M. Sauvage et al. "Cold dust but warm gas in the unusual elliptical galaxy NGC 4125." The Astrophysical Journal Letters, Vol. 776, No. 2 (Oct., 2013): L30.en_US
dc.relation.ispartofserialAstrophysical Journal Lettersen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectgalaxies: elliptical and lenticular, cden_US
dc.subjectgalaxies: individual (ngcen_US
dc.subjectgalaxies: ismen_US
dc.subjectinfrared: galaxiesen_US
dc.subjectherschel reference surveyen_US
dc.subjectnearby galaxiesen_US
dc.subjectobscured galaxiesen_US
dc.subjectscaling relationsen_US
dc.subjectmolecular gasen_US
dc.subjectastronomy & astrophysicsen_US
dc.titleCold Dust but Warm Gas in the Unusual Elliptical Galaxy NGC 4125en_US

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