# Far-Infrared Line Deficits in Galaxies with Extreme Lfir/MH2 Ratios

@article{GraciaCarpio2011FarInfraredLD,
title={Far-Infrared Line Deficits in Galaxies with Extreme Lfir/MH2 Ratios},
author={Javier Graci'a-Carpio and Eckhard Sturm and Steve Hailey-Dunsheath and Jacqueline Fischer and Alessandra Contursi and Albrecht Poglitsch and Reinhard Genzel and Eduardo Gonz'alez-Alfonso and Amiel Sternberg and Aprajita Verma and N. Christopher and Roger L Davies and Helmut Feuchtgruber and Jeroen de Jong and Dieter Lutz and Linda J. Tacconi},
journal={arXiv: Cosmology and Nongalactic Astrophysics},
year={2011}
}
We report initial results from the far-infrared fine structure line observations of a sample of 44 local starbursts, Seyfert galaxies and infrared luminous galaxies obtained with the PACS spectrometer on board Herschel. We show that the ratio between the far-infrared luminosity and the molecular gas mass, Lfir/MH2, is a much better proxy for the relative brightness of the far-infrared lines than Lfir alone. Galaxies with high Lfir/MH2 ratios tend to have weaker fine structure lines relative to…

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