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Molecular spectral line surveys and the organic molecules in the interstellar molecular clouds

Published online by Cambridge University Press:  01 February 2008

Masatoshi Ohishi
Masatoshi Ohishi*
Affiliation:
Astronomy Data Center, National Astronomical Observatory of Japan, the Graduate University for Advanced Studies (SOKENDAI), & the National Institute for Informatics, 2-21-1, Osawa, Mitaka, Tokyo, 181-8588, Japan email: masatoshi.ohishi@nao.ac.jp
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Abstract

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It is known that more than 140 interstellar and circumstellar molecules have so far been detected, mainly by means of the radio astronomy observations. Many organic molecules are also detected, including alcohols, ketons, ethers, aldehydes, and others, that are distributed from dark clouds and hot cores in the giant molecular clouds. It is believed that most of the organic molecules in space are synthesized through the grain surface reactions, and are evaporated from the grain surface when they are heated up by the UV radiation from adjacent stars.

On the other hand the recent claim on the detection of glycine have raised an important issue how difficult it is to confirm secure detection of weak spectra from less abundant organic molecules in the interstellar molecular cloud.

I will review recent survey observations of organic molecules in the interstellar molecular clouds, including independent observations of glycine by the 45 m radio telescope in Japan, and will discuss the procedure to securely identify weak spectral lines from organic molecules and the importance of laboratory measurement of organic species.

Keywords

ISM: moleculesline: identificationmolecular data
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S251: Organic Matter in Space , February 2008 , pp. 17 - 26
Copyright
Copyright © International Astronomical Union 2008

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