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- W2079264260 abstract "We present the results of a high angular resolution, multi-transition analysis of the molecular gas in M 82. The analysis is based on the two lowest transitions of and the ground transition of the rare isotopes and measured with the PdBI, the BIMA array and the IRAM 30 m telescope. In order to address the question of how the intrinsic molecular cloud properties are influenced by massive star formation we have carried out radiative transfer calculations based on the observed CO line ratios. The calculations suggest that the kinetic temperature of the molecular gas is high in regions with strong star formation and drops towards the outer molecular lobes with less ongoing star formation. The location of the highest kinetic temperature is coincident with that of the mid infrared (MIR) peaks which trace emission from hot dust. The hot gas is associated with low H2 densities while the cold gas in the outer molecular lobes has high H2 densities. We find that CO intensities do not trace H2, column densities well. Most of the molecular gas is distributed in a double-lobed distribution which surrounds the starburst. A detailed analysis of the conversion factor from CO intensity to H2 column density shows that XCO depends on the excitation conditions. We find , as expected for virialized clouds." @default.
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- W2079264260 date "2001-01-01" @default.
- W2079264260 modified "2023-10-16" @default.
- W2079264260 title "The effect of violent star formation on the state of the molecular gas in M 82" @default.
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- W2079264260 doi "https://doi.org/10.1051/0004-6361:20000145" @default.
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