@article{10902/4805,
year = {2014},
month = {1},
url = {http://hdl.handle.net/10902/4805},
abstract = {We report the first results from a spectroscopic survey of the [C II] 158 μm line from a sample of intermediate redshift (0.2 <z < 0.8) (ultra)-luminous infrared galaxies, (U)LIRGs (L IR > 1011.5 L ☉), using the Spectral and Photometric Imaging REceiver-Fourier Transform Spectrometer on board the Herschel Space Observatory. This is the first survey of [C II] emission, an important tracer of star formation, at a redshift range where the star formation rate density of the universe increases rapidly. We detect strong [C II] 158 μm line emission from over 80% of the sample. We find that the [C II] line is luminous, in the range (0.8-4) × 10–3 of the far-infrared continuum luminosity of our sources, and appears to arise from photodissociation regions on the surface of molecular clouds. The L [C II]/L IR ratio in our intermediate redshift (U)LIRGs is on average ~10 times larger than that of local ULIRGs. Furthermore, we find that the L [C II]/L IR and L [C II]/L CO(1-0) ratios in our sample are similar to those of local normal galaxies and high-z star-forming galaxies. ULIRGs at z ~ 0.5 show many similarities to the properties of local normal and high-z star-forming galaxies. Our findings strongly suggest that rapid evolution in the properties of the star-forming regions of (U)LIRGs is likely to have occurred in the last 5 billion years.},
publisher = {American Astronomical Society},
publisher = {Institute of Physics},
publisher = {The astrophysical Journal Letters, vol. 781, iss. 1, art. num. L15, (2014)},
title = {Herschel Observations of Far-infrared Cooling Lines in Intermediate Redshift (Ultra)-luminous Infrared Galaxies},
author = {Rigopoulou, Dimitra and Hopwood, Ros H. B. and Magdis, Georgios E. and Thatte, N. and Swinyard, B. M. and Farrah, Duncan and Huang, Jiasheng and Alonso Herrero, Almudena and Bock, Jamie and Clements, David L. and Cooray, Asantha R. and Griffin, M. J. and Oliver, Seb and Pearson, C. and Riechers, D. and Scott, Douglas and Smith, A. and Vaccari, Mattia and Valtchanov, Ivan and Wang, L.},
}