A photodissociation model for the morphology of the HI near OB associations in M33
arXiv:0905.3864 · doi:10.1088/0004-637X/700/1/545
Abstract
We present an approach for analysing the morphology and physical properties of Hi features near giant OB asso- ciations in M33, in the context of a model whereby the Hi excess arises from photodissociation of the molecular gas in remnants of the parent Giant Molecular Clouds (GMCs). Examples are presented here in the environs of NGC604 and CPSDPZ204, two prominent Hii regions in M33. These are the first results of a detailed analysis of the environs of a large number of OB associations in that galaxy. We present evidence for "diffusion" of the far-UV radiation from the OB association through a clumpy remnant GMC, and show further that enhanced CO(1-0) emission appears preferentially associated with GMCs of higher volume density.
Accepted to ApJ
References in corpus (5)
- The M33 Metallicity Project: Resolving the Abundance Gradient Discrepancies in M33
- A Wide-field High Resolution HI Mosaic of Messier 31: I. Opaque Atomic Gas and Star Formation Rate Density
- The volume densities of GMCs in M81
- Interstellar abundances in the neutral and ionized gas of NGC604
- The volume densities of giant molecular clouds in M83