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The CO-H2 conversion factor in disc galaxies and mergers

Narayanan, Desika; Krumholz, Mark; Ostriker, Eve C.; Hernquist, Lars


Relating the observed CO emission from giant molecular clouds (GMCs) to the underlying H2 column density is a long-standing problem in astrophysics. While the Galactic CO–H2 conversion factor (XCO) appears to be reasonably constant, observations indicate that XCO may be depressed in high surface density starburst environments. Using a multiscale approach, we investigate the dependence of XCO on the galactic environment in numerical simulations of disc galaxies and galaxy mergers. XCO is...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Monthly Notices of the Royal Astronomical Society
DOI: 10.1111/j.1365-2966.2011.19516.x
Access Rights: Open Access


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