Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..476s&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
In both the ISM and comets the astrochemistry of highly saturated molecules of biological interest (biomolecules)can be studied by utilizing three properties of radio interferometric arrays: high angular resolution over a large field of view; spatial filtering which promotes the study of hot compact cores (HMCs); and flexible correlators. Autocorrelation spectra from single-element telescopes are useful for observing extended low temperature clouds of molecular gas that form via gas phase ion-molecule reactions. In contrast array spatial filtering suppresses the extended emission from ion-molecule chemistry thereby lessening confusion. The relevance of HMCs to prebiotic chemistry is strengthened as evidence emerges for a hot core phase in low mass star formation regions. Images of low mass young stellar objects have revealed both physical conditions that mimic those in HMCs and also large abundances of grain mantle products such as methanol. Consequently interferometric studies of large saturated interstellar molecules in the ISM have been extended to comets. Emission sources associated with the nucleus can be separated from those associated with the extended coma. A key goal is the interferometric detection and mapping of glycine which should be formed along chemical pathways similar to those for HMC species.
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