Browsing by Subject "intergalactic medium"

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    CO in Hickson compact group galaxies with enhanced warm H 2 emission: Evidence for galaxy evolution?
    (2014) Lisenfeld, U; Appleton, P N; Cluver, M E; Guillard, P; Alatalo, K; Ogle, P
    Context. Galaxies in Hickson Compact Groups (HCGs) are believed to experience morphological transformations from blue, star-forming galaxies to red, early-type galaxies. Galaxies with a high ratio between the luminosities of the warm H2 to the 7.7 μm PAH emission (so-called Molecular Hydrogen Emission Galaxies, MOHEGs) are predominantly in an intermediate phase, the green valley. Their enhanced H2 emission suggests that the molecular gas is affected in the transition.