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The Molecular ISM of Low Surface Brightness Spiral Galaxies | | L. D. Matthews
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15 Sep 2005 | | Subject: | astro-ph | | Affiliation: | Harvard-Smithsonian Center for Astrophysics | | Abstract: | I summarize some results from the recent CO survey of late-type, low surface brightness (LSB) spiral galaxies by Matthews et al. (2005). We have now detected CO emission from six late-type, LSB spirals, demonstrating that despite their typical low metallicities and low mean gas surface densities, some LSB galaxies contain a molecular medium that is traced by CO. We find that the CO-detected LSB spirals adhere to the same M_H2-FIR correlation as brighter galaxies. We also find a significant drop-off in the detectability of CO among low-to-intermediate surface brightness galaxies with V_rot<~90 km/s, pointing toward fundamental changes in the physical conditions of the ISM with decreasing disk mass. | | Source: | arXiv, astro-ph/0509475 | | Services: | Forum | Review | PDF | Favorites | |
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