Extended [c

T. Díaz-Santos, L. Armus, V. Charmandaris, G. Stacey, E. J. Murphy, S. Haan, S. Stierwalt, S. Malhotra, P. Appleton, H. Inami, G. E. Magdis, D. Elbaz, A. S. Evans, J. M. Mazzarella, J. A. Surace, P. P. Van Der Werf, C. K. Xu, N. Lu, R. Meijerink, J. H. HowellA. O. Petric, S. Veilleux, D. B. Sanders

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

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.

Original languageEnglish (US)
Article numberL17
JournalAstrophysical Journal Letters
Volume788
Issue number1
DOIs
StatePublished - Jun 10 2014

Fingerprint

galaxies
nuclei
observatory
trends
prediction
trend
stars
disk galaxies
photodissociation
sky
observatories
luminosity
slopes
predictions

Keywords

  • galaxies: ISM
  • galaxies: nuclei
  • galaxies: starburst
  • infrared: galaxies

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Díaz-Santos, T., Armus, L., Charmandaris, V., Stacey, G., Murphy, E. J., Haan, S., ... Sanders, D. B. (2014). Extended [c. Astrophysical Journal Letters, 788(1), [L17]. https://doi.org/10.1088/2041-8205/788/1/L17

Extended [c. / Díaz-Santos, T.; Armus, L.; Charmandaris, V.; Stacey, G.; Murphy, E. J.; Haan, S.; Stierwalt, S.; Malhotra, S.; Appleton, P.; Inami, H.; Magdis, G. E.; Elbaz, D.; Evans, A. S.; Mazzarella, J. M.; Surace, J. A.; Van Der Werf, P. P.; Xu, C. K.; Lu, N.; Meijerink, R.; Howell, J. H.; Petric, A. O.; Veilleux, S.; Sanders, D. B.

In: Astrophysical Journal Letters, Vol. 788, No. 1, L17, 10.06.2014.

Research output: Contribution to journalArticle

Díaz-Santos, T, Armus, L, Charmandaris, V, Stacey, G, Murphy, EJ, Haan, S, Stierwalt, S, Malhotra, S, Appleton, P, Inami, H, Magdis, GE, Elbaz, D, Evans, AS, Mazzarella, JM, Surace, JA, Van Der Werf, PP, Xu, CK, Lu, N, Meijerink, R, Howell, JH, Petric, AO, Veilleux, S & Sanders, DB 2014, 'Extended [c', Astrophysical Journal Letters, vol. 788, no. 1, L17. https://doi.org/10.1088/2041-8205/788/1/L17
Díaz-Santos T, Armus L, Charmandaris V, Stacey G, Murphy EJ, Haan S et al. Extended [c. Astrophysical Journal Letters. 2014 Jun 10;788(1). L17. https://doi.org/10.1088/2041-8205/788/1/L17
Díaz-Santos, T. ; Armus, L. ; Charmandaris, V. ; Stacey, G. ; Murphy, E. J. ; Haan, S. ; Stierwalt, S. ; Malhotra, S. ; Appleton, P. ; Inami, H. ; Magdis, G. E. ; Elbaz, D. ; Evans, A. S. ; Mazzarella, J. M. ; Surace, J. A. ; Van Der Werf, P. P. ; Xu, C. K. ; Lu, N. ; Meijerink, R. ; Howell, J. H. ; Petric, A. O. ; Veilleux, S. ; Sanders, D. B. / Extended [c. In: Astrophysical Journal Letters. 2014 ; Vol. 788, No. 1.
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abstract = "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.",
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T1 - Extended [c

AU - Díaz-Santos, T.

AU - Armus, L.

AU - Charmandaris, V.

AU - Stacey, G.

AU - Murphy, E. J.

AU - Haan, S.

AU - Stierwalt, S.

AU - Malhotra, S.

AU - Appleton, P.

AU - Inami, H.

AU - Magdis, G. E.

AU - Elbaz, D.

AU - Evans, A. S.

AU - Mazzarella, J. M.

AU - Surace, J. A.

AU - Van Der Werf, P. P.

AU - Xu, C. K.

AU - Lu, N.

AU - Meijerink, R.

AU - Howell, J. H.

AU - Petric, A. O.

AU - Veilleux, S.

AU - Sanders, D. B.

PY - 2014/6/10

Y1 - 2014/6/10

N2 - 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.

AB - 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.

KW - galaxies: ISM

KW - galaxies: nuclei

KW - galaxies: starburst

KW - infrared: galaxies

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