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dc.contributorVirginia Techen
dc.contributor.authorFarrah, D.en
dc.contributor.authorLebouteiller, V.en
dc.contributor.authorSpoon, H. W. W.en
dc.contributor.authorBernard-Salas, J.en
dc.contributor.authorPearson, C.en
dc.contributor.authorRigopoulou, D.en
dc.contributor.authorSmith, H. A.en
dc.contributor.authorGonzalez-Alfonso, E.en
dc.contributor.authorClements, D. L.en
dc.contributor.authorEfstathiou, A.en
dc.contributor.authorCormier, D.en
dc.contributor.authorAfonso, J.en
dc.contributor.authorPetty, S. M.en
dc.contributor.authorHarris, K.en
dc.contributor.authorHurley, P.en
dc.contributor.authorBorys, C.en
dc.contributor.authorVerma, A.en
dc.contributor.authorCooray, A.en
dc.contributor.authorSalvatelli, V.en
dc.date.accessioned2014-02-25T13:57:04Zen
dc.date.available2014-02-25T13:57:04Zen
dc.date.issued2013-10en
dc.identifier.citationD. Farrah et al. 2013. "Far-infrared fine-structure line diagnostics of ultraluminous infrared galaxies," ApJ 776 38 doi:10.1088/0004-637X/776/1/38en
dc.identifier.issn0004-637Xen
dc.identifier.urihttp://hdl.handle.net/10919/25547en
dc.description.abstractWe present Herschel observations of 6 fine-structure lines in 25 ultraluminous infrared galaxies at z < 0.27. The lines, [O III]52 mu m, [N III] 57 mu m, [O I]63 mu m, [N II]122 mu m, [O I]145 mu m, and [C II]158 mu m, are mostly single Gaussians with widths < 600 km s(-1) and luminosities of 10(7)-10(9) L-circle dot. There are deficits in the [O I] 63/L-IR, [N II]/L-IR, [O I]145/L-IR, and [C II]/L-IR ratios compared to lower luminosity systems. The majority of the line deficits are consistent with dustier H II regions, but part of the [C II] deficit may arise from an additional mechanism, plausibly charged dust grains. This is consistent with some of the [C II] originating from photodissociation regions or the interstellar medium (ISM). We derive relations between far-IR line luminosities and both the IR luminosity and star formation rate. We find that [N II] and both [O I] lines are good tracers of the IR luminosity and star formation rate. In contrast, [C II] is a poor tracer of the IR luminosity and star formation rate, and does not improve as a tracer of either quantity if the [C II] deficit is accounted for. The continuum luminosity densities also correlate with the IR luminosity and star formation rate. We derive ranges for the gas density and ultraviolet radiation intensity of 10(1) < n < 10(2.5) and 10(2.2) < G(0) < 10(3.6), respectively. These ranges depend on optical type, the importance of star formation, and merger stage. We do not find relationships between far-IR line properties and several other parameters: active galactic nucleus (AGN) activity, merger stage, mid-IR excitation, and SMBH mass. We conclude that these far-IR lines arise from gas heated by starlight, and that they are not strongly influenced by AGN activity.en
dc.description.sponsorshipNASAen
dc.description.sponsorshipCEA/Marie Curie Eurotalents fellowshipen
dc.description.sponsorshipScience and Technology Foundation (FCT, Portugal) PTDC/CTE-AST/105287/2008, PEst-OE/FIS/UI2751/2011, PTDC/FIS-AST/2194/2012en
dc.description.sponsorshipSpanish Ministerio de Economia y Competitividad AYA2010-21697-C05-0, FIS2012-39162-C06-01en
dc.language.isoen_USen
dc.publisherIOP Publishing Ltd.en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectgalaxies: activeen
dc.subjectgalaxies: evolutionen
dc.subjectgalaxies: ismen
dc.subjectgalaxies:en
dc.subjectstarbursten
dc.subjectinfrared: galaxiesen
dc.subjectactive galactic nucleien
dc.subjectstar-formation rateen
dc.subjectspectralen
dc.subjectenergy-distributionsen
dc.subjectpolycyclic aromatic-hydrocarbonsen
dc.subjectspitzer-space-telescopeen
dc.subjectblack-hole massesen
dc.subjectsimilar-to 2en
dc.subject158 mu-men
dc.subjectherschel-pacs observationsen
dc.subjecthubble-deep-fielden
dc.titleFar-infrared fine-structure line diagnostics of ultraluminous infrared galaxiesen
dc.typeArticle - Refereeden
dc.contributor.departmentPhysicsen
dc.identifier.urlhttp://iopscience.iop.org/0004-637X/776/1/38/pdf/0004-637X_776_1_38.pdfen
dc.date.accessed2014-02-05en
dc.title.serialAstrophysical Journalen
dc.identifier.doihttps://doi.org/10.1088/0004-637x/776/1/38en


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