EXTENDED [C II] EMISSION IN LOCAL LUMINOUS INFRARED GALAXIES
We present Herschel/PACS observations of extended [C II] 157.7 μm line emission detected on 1-10 kpc scales in 60 local luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey. We find that most of the extra-nuclear emission show [C II]/FIR ratios ≥4 × 10-3, larger than t...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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Institute of Physics Publishing
2014
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| _version_ | 1826258513897193472 |
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| author | Diaz-Santos, T Armus, L Charmandaris, V Stacey, G Murphy, E Haan, S Stierwalt, S Malhotra, S Appleton, P Inami, H Magdis, G Elbaz, D Evans, A Mazzarella, J Surace, J van der Werf, P Xu, C Lu, N Meijerink, R Howell, J Petric, A Veilleux, S Sanders, D |
| author_facet | Diaz-Santos, T Armus, L Charmandaris, V Stacey, G Murphy, E Haan, S Stierwalt, S Malhotra, S Appleton, P Inami, H Magdis, G Elbaz, D Evans, A Mazzarella, J Surace, J van der Werf, P Xu, C Lu, N Meijerink, R Howell, J Petric, A Veilleux, S Sanders, D |
| author_sort | Diaz-Santos, T |
| collection | OXFORD |
| description | We present Herschel/PACS observations of extended [C II] 157.7 μm line emission detected on 1-10 kpc scales in 60 local luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey. We find that most of the extra-nuclear emission show [C II]/FIR ratios ≥4 × 10-3, larger than the mean ratio seen in the nuclei, and similar to those found in the extended disks of normal star-forming galaxies and the diffuse interstellar medium of our Galaxy. The [C II] "deficits" found in the most luminous local LIRGs are therefore restricted to their nuclei. There is a trend for LIRGs with warmer nuclei to show larger differences between their nuclear and extra-nuclear [C II]/FIR ratios. We find an anti-correlation between [C II]/FIR and the luminosity surface density, ΣIR, for the extended emission in the spatially resolved galaxies. However, there is an offset between this trend and that found for the LIRG nuclei. We use this offset to derive a beam filling-factor for the star-forming regions within the LIRG disks of 6% relative to their nuclei. We confront the observed trend to photo-dissociation region models and find that the slope of the correlation is much shallower than the model predictions. Finally, we compare the correlation found between [C II]/FIR and ΣIR with measurements of high-redshift starbursting IR-luminous galaxies. © 2014. The American Astronomical Society. All rights reserved.. |
| first_indexed | 2024-03-06T18:35:08Z |
| format | Journal article |
| id | oxford-uuid:0af5dee2-e5e6-4877-b466-4f582b0c329d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:35:08Z |
| publishDate | 2014 |
| publisher | Institute of Physics Publishing |
| record_format | dspace |
| spelling | oxford-uuid:0af5dee2-e5e6-4877-b466-4f582b0c329d2022-03-26T09:26:54ZEXTENDED [C II] EMISSION IN LOCAL LUMINOUS INFRARED GALAXIESJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0af5dee2-e5e6-4877-b466-4f582b0c329dEnglishSymplectic Elements at OxfordInstitute of Physics Publishing2014Diaz-Santos, TArmus, LCharmandaris, VStacey, GMurphy, EHaan, SStierwalt, SMalhotra, SAppleton, PInami, HMagdis, GElbaz, DEvans, AMazzarella, JSurace, Jvan der Werf, PXu, CLu, NMeijerink, RHowell, JPetric, AVeilleux, SSanders, DWe present Herschel/PACS observations of extended [C II] 157.7 μm line emission detected on 1-10 kpc scales in 60 local luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey. We find that most of the extra-nuclear emission show [C II]/FIR ratios ≥4 × 10-3, larger than the mean ratio seen in the nuclei, and similar to those found in the extended disks of normal star-forming galaxies and the diffuse interstellar medium of our Galaxy. The [C II] "deficits" found in the most luminous local LIRGs are therefore restricted to their nuclei. There is a trend for LIRGs with warmer nuclei to show larger differences between their nuclear and extra-nuclear [C II]/FIR ratios. We find an anti-correlation between [C II]/FIR and the luminosity surface density, ΣIR, for the extended emission in the spatially resolved galaxies. However, there is an offset between this trend and that found for the LIRG nuclei. We use this offset to derive a beam filling-factor for the star-forming regions within the LIRG disks of 6% relative to their nuclei. We confront the observed trend to photo-dissociation region models and find that the slope of the correlation is much shallower than the model predictions. Finally, we compare the correlation found between [C II]/FIR and ΣIR with measurements of high-redshift starbursting IR-luminous galaxies. © 2014. The American Astronomical Society. All rights reserved.. |
| spellingShingle | Diaz-Santos, T Armus, L Charmandaris, V Stacey, G Murphy, E Haan, S Stierwalt, S Malhotra, S Appleton, P Inami, H Magdis, G Elbaz, D Evans, A Mazzarella, J Surace, J van der Werf, P Xu, C Lu, N Meijerink, R Howell, J Petric, A Veilleux, S Sanders, D EXTENDED [C II] EMISSION IN LOCAL LUMINOUS INFRARED GALAXIES |
| title | EXTENDED [C II] EMISSION IN LOCAL LUMINOUS INFRARED GALAXIES |
| title_full | EXTENDED [C II] EMISSION IN LOCAL LUMINOUS INFRARED GALAXIES |
| title_fullStr | EXTENDED [C II] EMISSION IN LOCAL LUMINOUS INFRARED GALAXIES |
| title_full_unstemmed | EXTENDED [C II] EMISSION IN LOCAL LUMINOUS INFRARED GALAXIES |
| title_short | EXTENDED [C II] EMISSION IN LOCAL LUMINOUS INFRARED GALAXIES |
| title_sort | extended c ii emission in local luminous infrared galaxies |
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