CO, HI, recent Spitzer SAGE results in the Large Magellanic Cloud

Details CO, HI, recent Spitzer SAGE results in the Large Magellanic Cloud CO, HI, recent Spitzer SAGE results in the Large Magellanic Cloud

2007-10-16

arxiv.org/abs/0710.2989v1

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1017/S1743921307001184

Formation of GMCs is one of the most crucial issues in galaxy evolution. I will compare CO and HI in the LMC in 3 dimensional space for the first time aiming at revealing the physical connection between GMCs and associated HI gas at a ~40 pc scale. The present major findings are 1) [total CO intensity] [total HI intensity]0.8 for the 110 GMCs, and 2) the HI intensity tends to increase with the evolution of GMCs. I argue that these findings are consistent with the growth of GMCs via HI accretion over a time scale of a few x 10 Myrs. I will also discuss the role of the background stellar gravity and the dynamical compression by supershells in formation of GMCs.

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