A Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies

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dc.contributor.authorDiaz Santos, T.
dc.contributor.authorArmus, L.
dc.contributor.authorCharmandaris, V.
dc.contributor.authorLu, N.
dc.contributor.authorStierwalt, S.
dc.contributor.authorStacey, G.
dc.contributor.authorMalhotra, S.
dc.contributor.authorvan der Werf, P. P.
dc.contributor.authorHowell, J. H.
dc.contributor.authorPrivon, G. C.
dc.contributor.authorMazzarella, J. M.
dc.contributor.authorGoldsmith, P. F.
dc.contributor.authorMurphy, E. J.
dc.contributor.authorBarcos Munoz, L.
dc.contributor.authorLinden, S. T.
dc.contributor.authorInami, H.
dc.contributor.authorLarson, L.
dc.contributor.authorEvans, A. S.
dc.contributor.authorAppleton, P.
dc.contributor.authorIwasawa, K.
dc.contributor.authorLord, S.
dc.contributor.authorSanders, D. B.
dc.contributor.authorSurace, J. A.
dc.date.accessioned2024-01-10T12:37:29Z
dc.date.available2024-01-10T12:37:29Z
dc.date.issued2017
dc.description.abstractWe present an analysis of [O I](63), [O III](88), [N II](122), and [C II](158) far-infrared (FIR) fine-structure line observations obtained with Herschel/PACS, for similar to 240 local luminous infrared galaxies (LIRGs) in the Great Observatories All-sky LIRG Survey. We find pronounced declines ("deficits") of line-to-FIR continuum emission for [N II](122), [O I](63), and [C II](158) as a function of FIR color and infrared luminosity surface density, Sigma(IR). The median electron density of the ionized gas in LIRGs, based on the [N II](122)/[N II](205) ratio, is n(e) = 41 cm(-3). We find that the dispersion in the [C II](158) deficit of LIRGs is attributed to a varying fractional contribution of photodissociation regions (PDRs) to the observed [C II](158) emission, f ([C II](158)(PDR)) = [C II](158)(PDR)/C II](158), which increases from similar to 60% to similar to 95% in the warmest LIRGs. The [O I](63)/[C II](158)(PDR) ratio is tightly correlated with the PDR gas kinetic temperaturein sources where [O I] 63 is not optically thick or self-absorbed. For each galaxy, we derive the average PDR hydrogen density, n(H), and intensity of the interstellar radiation field, G, in units of G(0) and find G/n(H) ratios of similar to 0.1-50 G(0) cm(3), with ULIRGs populating the upper end of the distribution. There is a relation between G/n(H) and Sigma(IR), showing a critical break at Sigma(IR)* similar or equal to 5 x 10(10) L-circle dot kpc(-2). Below Sigma(IR)*, G/n(H) remains constant, similar or equal to 0.32G(0) cm(3), and variations in Sigma(IR) are driven by the number density of star-forming regions within a galaxy, with no change in their PDR properties. Above Sigma(IR)*, G/n(H) increases rapidly with Sigma(IR), signaling a departure from the typical PDR conditions found in normal star-forming galaxies toward more intense/harder radiation fields and compact geometries typical of starbursting sources.
dc.description.funderALMA-CONICYT
dc.description.funderFONDECYT
dc.description.funderNSFC
dc.description.funderSpanish MINECO of ICCUB (Unidad de Excelencia "Maria de Maeztu")
dc.description.funderNASA
dc.description.funderNational Science Foundation
dc.fechaingreso.objetodigital2024-05-30
dc.format.extent22 páginas
dc.fuente.origenWOS
dc.identifier.doi10.3847/1538-4357/aa81d7
dc.identifier.eissn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttps://doi.org/10.3847/1538-4357/aa81d7
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/76857
dc.identifier.wosidWOS:000408687300009
dc.information.autorucFísica;Privon GC;S/I;1031484
dc.issue.numero1
dc.language.isoen
dc.nota.accesoContenido parcial
dc.publisherIOP PUBLISHING LTD
dc.revistaASTROPHYSICAL JOURNAL
dc.rightsacceso restringido
dc.subjectgalaxies: evolution
dc.subjectgalaxies: ISM
dc.subjectgalaxies: nuclei
dc.subjectgalaxies: starburst
dc.subjectinfrared: galaxies
dc.subjectC-II LINE
dc.subjectSPACE-OBSERVATORY MEASUREMENTS
dc.subjectSTAR-FORMATION
dc.subjectMICRON LINE
dc.subjectMU-M
dc.subjectPHOTODISSOCIATION REGIONS
dc.subjectMOLECULAR CLOUDS
dc.subjectO-I
dc.subjectSPECTROSCOPY
dc.subjectCONTINUUM
dc.titleA Herschel/PACS Far-infrared Line Emission Survey of Local Luminous Infrared Galaxies
dc.typeartículo
dc.volumen846
sipa.codpersvinculados1031484
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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