Interstellar medium conditions in z ~ 0.2 Lyman-break analogs
We present an analysis of far-infrared (FIR) [CII] and [OI] fine structure line and continuum observations obtained with <i>Herschel<i/>/PACS, and <sup>12<sup/>CO(1-0) observations obtained with the IRAM Plateau de Bure Interferometer, of Lyman-break analogs (LBAs) at <i&g...
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| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
17 October 2017
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| In: |
Astronomy and astrophysics
Year: 2017, Jahrgang: 606, Pages: 1-18 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/201730609 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1051/0004-6361/201730609 Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2017/10/aa30609-17/aa30609-17.html 
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| Verfasserangaben: | A. Contursi, A.J. Baker, S. Berta, B. Magnelli, D. Lutz, J. Fischer, A. Verma, M. Nielbock, J. Grácia Carpio, S. Veilleux, E. Sturm, R. Davies, R. Genzel, S. Hailey-Dunsheath, R. Herrera-Camus, A. Janssen, A. Poglitsch, A. Sternberg and L.J. Tacconi |
MARC
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| 245 | 1 | 0 | |a Interstellar medium conditions in z ~ 0.2 Lyman-break analogs |c A. Contursi, A.J. Baker, S. Berta, B. Magnelli, D. Lutz, J. Fischer, A. Verma, M. Nielbock, J. Grácia Carpio, S. Veilleux, E. Sturm, R. Davies, R. Genzel, S. Hailey-Dunsheath, R. Herrera-Camus, A. Janssen, A. Poglitsch, A. Sternberg and L.J. Tacconi |
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| 520 | |a We present an analysis of far-infrared (FIR) [CII] and [OI] fine structure line and continuum observations obtained with <i>Herschel<i/>/PACS, and <sup>12<sup/>CO(1-0) observations obtained with the IRAM Plateau de Bure Interferometer, of Lyman-break analogs (LBAs) at <i>z<i/> ~ 0.2. The principal aim of this work is to determine the typical interstellar medium (ISM) properties of <i>z<i/> ~ 1−2 main sequence (MS) galaxies, with stellar masses between 10<sup>9.5<sup/> and 10<sup>11<sup/><i>M<i/><sub>⊙<sub/>, which are currently not easily detectable in all these lines even with ALMA and NOEMA. We perform PDR modeling and apply different infared diagnostics to derive the main physical parameters of the far-infrared (FIR)-emitting gas and dust and we compare the derived ISM properties to those of galaxies on and above the MS at different redshifts. We find that the ISM properties of LBAs are quite extreme (low gas temperature and high density and thermal pressure) with respect to those found in local normal spirals and more active local galaxies. LBAs have no [CII] deficit despite having the high specific star formation rates (sSFRs) typical of starbursts. Although LBAs lie above the local MS, we show that their ISM properties are more similar to those of high-redshift MS galaxies than of local galaxies above the main sequence. This data set represents an important reference for planning future ALMA [CII] observations of relatively low-mass MS galaxies at the epoch of the peak of the cosmic star formation. | ||
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