HERSCHEL observations of far-infrared cooling lines in intermediate redshift (ultra)-luminous infrared galaxies

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dc.contributorVirginia Techen
dc.contributor.authorRigopoulou, D.en
dc.contributor.authorHopwood, R.en
dc.contributor.authorMagdis, G. E.en
dc.contributor.authorThatte, N.en
dc.contributor.authorSwinyard, B. M.en
dc.contributor.authorFarrah, D.en
dc.contributor.authorHuang, J. S.en
dc.contributor.authorAlonso-Herrero, A.en
dc.contributor.authorBock, J. J.en
dc.contributor.authorClements, D. L.en
dc.contributor.authorCooray, A.en
dc.contributor.authorGriffin, M. J.en
dc.contributor.authorOliver, S.en
dc.contributor.authorPearson, C.en
dc.contributor.authorRiechers, D. A.en
dc.contributor.authorScott, D.en
dc.contributor.authorSmith, A.en
dc.contributor.authorVaccari, M.en
dc.contributor.authorValtchanov, I.en
dc.contributor.authorWang, L.en
dc.contributor.departmentPhysicsen
dc.date.accessed2014-02-05en
dc.date.accessioned2014-02-25T13:57:07Zen
dc.date.available2014-02-25T13:57:07Zen
dc.date.issued2014-01en
dc.description.abstractWe report the first results from a spectroscopic survey of the [C II] 158 mu m line from a sample of intermediate redshift (0.2 < z < 0.8) (ultra)-luminous infrared galaxies, (U) LIRGs (L-IR > 10(11.5) L-circle dot), using the Spectral and Photometric Imaging REceiver-Fourier Transform Spectrometer on board the Herschel Space Observatory. This is the first survey of [C II] emission, an important tracer of star formation, at a redshift range where the star formation rate density of the universe increases rapidly. We detect strong [C II] 158 mu m line emission from over 80% of the sample. We find that the [C II] line is luminous, in the range (0.8-4) x 10(-3) of the far-infrared continuum luminosity of our sources, and appears to arise from photodissociation regions on the surface of molecular clouds. The L-[C II]/L-IR ratio in our intermediate redshift (U) LIRGs is on average similar to 10 times larger than that of local ULIRGs. Furthermore, we find that the L-[C II]/L-IR and L-[C II]/LCO(1-0) ratios in our sample are similar to those of local normal galaxies and high-z star-forming galaxies. ULIRGs at z similar to 0.5 show many similarities to the properties of local normal and high-z star-forming galaxies. Our findings strongly suggest that rapid evolution in the properties of the star-forming regions of (U) LIRGs is likely to have occurred in the last 5 billion years.en
dc.identifier.citationD. Rigopoulou et al. 2014. "HERSCHEL observations of far-infrared cooling lines in intermediate redshift (ultra)-luminous infrared galaxies," ApJ 781 L15 doi:10.1088/2041-8205/781/1/L15en
dc.identifier.doihttps://doi.org/10.1088/2041-8205/781/1/L15en
dc.identifier.issn2041-8205en
dc.identifier.urihttp://hdl.handle.net/10919/25561en
dc.identifier.urlhttp://iopscience.iop.org/2041-8205/781/1/L15/pdf/2041-8205_781_1_L15.pdfen
dc.language.isoen_USen
dc.publisherIOP Publishing Ltd.en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectgalaxies: starbursten
dc.subjectinfrared: galaxiesen
dc.subjectinfrared: ismen
dc.subjectsimilar-to 2en
dc.subjectc-ii lineen
dc.subjectstar-formationen
dc.subjectsubmillimeter galaxies,en
dc.subjectphysical conditionsen
dc.subjectphotodissociation regionsen
dc.subjectinterstellar-medium,en
dc.subjectspectroscopyen
dc.subjectdeficiten
dc.subjectemissionen
dc.titleHERSCHEL observations of far-infrared cooling lines in intermediate redshift (ultra)-luminous infrared galaxiesen
dc.title.serialAstrophysical Journal Lettersen
dc.typeArticle - Refereeden

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