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dc.contributorVirginia Tech
dc.contributor.authorMagdis, G. E.
dc.contributor.authorRigopoulou, D.
dc.contributor.authorHelou, G.
dc.contributor.authorFarrah, D.
dc.contributor.authorHurley, P.
dc.contributor.authorAlonso-Herrero, A.
dc.contributor.authorBock, J.
dc.contributor.authorBurgarella, D.
dc.contributor.authorChapman, S.
dc.contributor.authorCharmandaris, V.
dc.contributor.authorCooray, A.
dc.contributor.authorDai, Y. S.
dc.contributor.authorDale, D.
dc.contributor.authorElbaz, D.
dc.contributor.authorFeltre, A.
dc.contributor.authorHatziminaoglou, E.
dc.contributor.authorHuang, J. S.
dc.contributor.authorMorrison, G.
dc.contributor.authorOliver, S.
dc.contributor.authorPage, M.
dc.contributor.authorScott, D.
dc.contributor.authorShi, Y.
dc.date.accessioned2014-05-14T17:03:34Z
dc.date.available2014-05-14T17:03:34Z
dc.date.issued2013-10
dc.identifier.citationMagdis, G. E., et al., "Mid- to far-infrared properties of star-forming galaxies and active galactic nuclei," A&A 558, A136 (2013). DOI: 10.1051/0004-6361/201322226
dc.identifier.issn0004-6361
dc.identifier.urihttp://hdl.handle.net/10919/48021
dc.description.abstractWe study the mid- to far-IR properties of a 24 mu m-selected flux-limited sample (S-24 > 5mJy) of 154 intermediate redshift (< z > similar to 0.15), infrared luminous galaxies, drawn from the 5 Milli-Jansky Unbiased Spitzer Extragalactic Survey. By combining existing mid-IR spectroscopy and new Herschel SPIRE submm photometry from the Herschel Multi-tiered Extragalactic Survey, we derived robust total infrared luminosity (L-IR) and dust mass (M-dust) estimates and infered the relative contribution of the AGN to the infrared energy budget of the sources. We found that the total (8-1000 mu m) infrared emission of galaxies with weak 6.2 mu m PAH emission (EW6.2 <= 0.2 mu m) is dominated by AGN activity, while for galaxies with EW6.2 > 0.2 mu m more than 50% of the L-IR arises from star formation. We also found that for galaxies detected in the 250-500 mu m Herschel bands an AGN has a statistically insignificant effect on the temperature of the cold dust and the far-IR colours of the host galaxy, which are primarily shaped by star formation activity. For star-forming galaxies we reveal an anti-correlation between the L-IR-to-rest-frame 8 mu m luminosity ratio, IR8 = L-IR/L-8 and the strength of PAH features. We found that this anti-correlation is primarily driven by variations in the PAHs emission, and not by variations in the 5-15 mu m mid-IR continuum emission. Using the [NeIII]/[NeII] line ratio as a tracer of the hardness of the radiation field, we confirm that galaxies with harder radiation fields tend to exhibit weaker PAH features, and found that they have higher IR8 values and higher dust-mass-weighted luminosities (L-IR/M-dust), the latter being a proxy for the dust temperature (T-d). We argue that these trends originate either from variations in the environment of the star-forming regions or are caused by variations in the age of the starburst. Finally, we provide scaling relations that will allow estimating L-IR, based on single-band observations with the mid-infrared instrument, on board the upcoming James Webb Space Telescope.
dc.description.sponsorshipJohn Fell Oxford University Press (OUP)
dc.description.sponsorshipUniversity of Oxford
dc.description.sponsorshipUniversidad de Cantabria August G. Linares Programme
dc.description.sponsorshipEU PIRSES-GA-20120316788
dc.language.isoen_US
dc.publisherEDP SCIENCES
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectgalaxies: evolution
dc.subjectgalaxies: active
dc.subjectgalaxies: starburst
dc.subjectgalaxies:
dc.subjectstar formation
dc.subjectinfrared: galaxies
dc.subjectspitzer-space-telescope
dc.subjectspectral energy-distributions
dc.subjectpolycyclic
dc.subjectaromatic-hydrocarbons
dc.subjectneed ultraviolet excitation
dc.subjectpalomar-green
dc.subjectquasars
dc.subjectpower-law galaxies
dc.subjectdeep-field-south
dc.subjectmidinfrared spectroscopy
dc.subjectinterstellar-medium
dc.subjectluminous galaxies
dc.subjectastronomy & astrophysics
dc.titleMid- to far-infrared properties of star-forming galaxies and active galactic nuclei
dc.typeArticle - Refereed
dc.contributor.departmentPhysicsen_US
dc.identifier.urlhttp://www.aanda.org/articles/aa/abs/2013/10/aa22226-13/aa22226-13.html
dc.date.accessed2014-05-08
dc.title.serialAstronomy & Astrophysics
dc.identifier.doihttps://doi.org/10.1051/0004-6361/201322226


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