The CO-H2 conversion factor of diffuse ISM: Bright 12CO emission also traces diffuse gas

Harvey S. Liszt (NRAO); J\'er\^ome Pety (IRAM; OP); Robert Lucas (JAO)

arxiv: 1102.4667 · v1 · pith:THC6Z3LRnew · submitted 2011-02-23 · 🌌 astro-ph.GA

The CO-H2 conversion factor of diffuse ISM: Bright 12CO emission also traces diffuse gas

J\'er\^ome Pety (IRAM , OP) , Harvey S. Liszt (NRAO) , Robert Lucas (JAO) This is my paper

classification 🌌 astro-ph.GA

keywords diffusemolecularfactorbrightco-h2coincidencecolumnconsequences

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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.

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The CO-H2 conversion factor of diffuse ISM: Bright 12CO emission also traces diffuse gas

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