%0 Generic %1 diazsantos2014extended %A Diaz-Santos, T. %A Armus, L. %A Charmandaris, V. %A Stacey, G. %A Murphy, E. J. %A Haan, S. %A Stierwalt, S. %A Malhotra, S. %A Appleton, P. %A Inami, H. %A Magdis, G. E. %A Elbaz, D. %A Evans, A. S. %A Mazzarella, J. M. %A Surace, J. A. %A van der Werf, P. P. %A Xu, C. K. %A Lu, N. %A Meijerink, R. %A Howell, J. H. %A Petric, A. O. %A Veilleux, S. %A Sanders, D. B. %D 2014 %K cii fir infrared luminous sfr tracer %T Extended CII Emission in Local Luminous Infrared Galaxies %U http://arxiv.org/abs/1405.3983 %X We present Herschel/PACS observations of extended CII157.7\mum line emission detected on ~ 1 - 10 kpc scales in 60 local luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey (GOALS). We find that most of the extra-nuclear emission show CII/FIR ratios >~ 4 x 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 inter-stellar medium (ISM) of our Galaxy. The CII "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 CII/FIR ratios. We find an anti-correlation between CII/FIR and the luminosity surface density, \Sigma_IR, 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 (PDR) models and find that the slope of the correlation is much shallower than the model predictions. Finally, we compare the correlation found between CII/FIR and \Sigma_IR with measurements of high-redshift starbursting IR-luminous galaxies.

@misc{diazsantos2014extended, abstract = {We present Herschel/PACS observations of extended [CII]157.7{\mu}m line emission detected on ~ 1 - 10 kpc scales in 60 local luminous infrared galaxies (LIRGs) from the Great Observatories All-sky LIRG Survey (GOALS). We find that most of the extra-nuclear emission show [CII]/FIR ratios >~ 4 x 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 inter-stellar medium (ISM) of our Galaxy. The [CII] "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 [CII]/FIR ratios. We find an anti-correlation between [CII]/FIR and the luminosity surface density, {\Sigma}_IR, 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 (PDR) models and find that the slope of the correlation is much shallower than the model predictions. Finally, we compare the correlation found between [CII]/FIR and {\Sigma}_IR with measurements of high-redshift starbursting IR-luminous galaxies.}, added-at = {2014-05-19T09:36:09.000+0200}, author = {Diaz-Santos, T. and Armus, L. and Charmandaris, V. and Stacey, G. and Murphy, E. J. and Haan, S. and Stierwalt, S. and Malhotra, S. and Appleton, P. and Inami, H. and Magdis, G. E. and Elbaz, D. and Evans, A. S. and Mazzarella, J. M. and Surace, J. A. and van der Werf, P. P. and Xu, C. K. and Lu, N. and Meijerink, R. and Howell, J. H. and Petric, A. O. and Veilleux, S. and Sanders, D. B.}, biburl = {https://www.bibsonomy.org/bibtex/2f069e8cf485a40caf544fdc1260bc8ee/miki}, description = {[1405.3983] Extended [CII] Emission in Local Luminous Infrared Galaxies}, interhash = {b87fc45a0fba9f3433ad7edce4b659cd}, intrahash = {f069e8cf485a40caf544fdc1260bc8ee}, keywords = {cii fir infrared luminous sfr tracer}, note = {cite arxiv:1405.3983Comment: Accepted for publication in ApJ Letters. 5 pages, 2 figures}, timestamp = {2014-05-19T09:36:09.000+0200}, title = {Extended [CII] Emission in Local Luminous Infrared Galaxies}, url = {http://arxiv.org/abs/1405.3983}, year = 2014 }