Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..875t&link_type=abstract
Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July
Astronomy and Astrophysics
Astronomy
Scientific paper
More than 20 molecules have been detected in galaxies. Studies of the relation between their abundances and the physical conditions are important to understand physical and chemical processes. Two starburst galaxies NGC253 and M82 are known to be suitable for such study; the H2 column densities are high and nearly the same and their distances are nearly the same (about 3 Mpc). Several abundant molecules have been detected in both of the galaxies with similar abundances. However it is known that SO SiO NH3 HNCO CH3OH and CH3CN have been clearly detected in NGC253 but barely detected with comparable sensitivity in M82. We found a common characteristic of above six molecules; they are efficiently produced under high-temperature conditions and/or they are originated from grain by evaporation process. We also compared abundances of above six molecules based on our observations including NH3 and on literatures in other nearby galaxies with rich molecular gas. As a result at least NH3 HNCO and/or CH3OH are abundant enough to be detected in NGC6946 IC342 Maffei2 M51 CenA and NGC4945 with comparable sensitivity. We concluded that the molecular composition in M82 is systematically peculiar regarding the formation mechanisms of molecules. Possible reasons are discussed.
Kawaguchi Kentaro
Nakai Noriyuki
Schilke Peter
Takano Shiro
Takano Toshiaki
No associations
LandOfFree
Systematically Peculiar Molecular Composition in M 82: Regarding the Formation Mechanisms does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Systematically Peculiar Molecular Composition in M 82: Regarding the Formation Mechanisms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systematically Peculiar Molecular Composition in M 82: Regarding the Formation Mechanisms will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-806586