Issue |
EAS Publications Series
Volume 52, 2011
Conditions and Impact of Star Formation
|
|
---|---|---|
Page(s) | 151 - 155 | |
DOI | https://doi.org/10.1051/eas/1152024 | |
Published online | 25 November 2011 |
Conditions and Impact of Star Formation
M. Röllig, R. Simon, V. Ossenkopf and J. Stutzki (eds)
EAS Publications Series, 52 (2011) 151-155
M. Röllig, R. Simon, V. Ossenkopf and J. Stutzki (eds)
EAS Publications Series, 52 (2011) 151-155
The CO-H2 conversion factor of diffuse ISM: Bright 12CO emission also traces diffuse gas
1 Institut de Radioastronomie
Millimétrique & Obs. de Paris,
France ;
e-mail: pety@iram.fr
2 National Radio Astronomy
Observatory, USA ;
e-mail: hliszt@nrao.edu
3 Joint ALMA Observatory,
Chili ;
e-mail: rlucas@alma.cl
We show that the XCO factor, which converts the CO luminosity into the column density of molecular hydrogen has similar values for dense, fully molecular gas and for diffuse, partially molecular gas. We discuss the reasons of this coincidence and the consequences for the understanding of the interstellar medium.
© EAS, EDP Sciences 2011