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Astron. Astrophys. 354, L6-L8 (2000)

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Letter to the Editor

Can DNA bases be produced during molecular cloud collapse?

Sonali Chakrabarti and Sandip K. Chakrabarti

S.N. Bose National Centre for Basic Sciences, JD-Block, Sector III, Salt Lake, Calcutta 700091, India

Received 2 November 1999 / Accepted 22 December 1999


Using a reasonably large chemical reaction network consisting of 421 species, we show that along with normal chemical evolution of molecular cloud during collapse and star formation, significant amount of adenine, a DNA base, may be produced after an evolution of [FORMULA] years. This findings may shed light on whether life on earth had to begin from scratch or these molecules could have contaminated the earth from the beginning.

Key words: ISM: molecules – ISM: clouds – stars: formation – molecular processes

© European Southern Observatory (ESO) 2000

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