A&A 473, 177-180 (2007)
A search for pre-biotic molecules in hot coresE. S. Wirström1, P. Bergman1, 2, Å. Hjalmarson1, and A. Nummelin3
1 Onsala Space Observatory, Chalmers University of Technology, 43992 Onsala, Sweden
2 European Southern Observatory, Alonso de Cordova 3107, Vitacura, Casilla 19001 Santiago, Chile
3 Computer science and engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden
(Received 23 March 2007 / Accepted 11 May 2007)
Aims.Our aim is to better understand the complex chemistry of organic molecules in the interstellar medium, leading to the formation of pre-biotic molecules such as amino acids.
Methods.We have performed a search for the pre-biotic molecules amino acetonitrile (H2N CH2 CN) and vinyl acetylene (C2H3 CCH) towards four northern hot core sources using the Onsala 20 m telescope.
Results.We have determined upper limits to the column density of amino acetonitrile (1- cm-2) and vinyl acetylene (2- cm-2) in the observed sources. In addition, from the absence of other lines within the observed frequency band, we have further constrained the column density of oxiranecarbonitrile (c-C3H3 NO) and amino-ethanol (NH2 CH2 CH2 OH) in these sources.
Key words: ISM: molecules -- astrobiology -- radio lines: ISM -- astrochemistry
© ESO 2007