Molecules at z=0.89: a survey of absorption lines over the whole 7mm band toward PKS1830-211

Details Molecules at z=0.89: a survey of absorption lines over the whole 7mm band toward PKS1830-211 Molecules at z=0.89: a survey of absorption lines over the whole 7mm band toward PKS1830-211

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atnf.prop.2497m&link_type=abstract

ATNF proposal C2120, Semester: July, 2009

Computer Science

Extragalactic, Atca

Scientific paper

Taking advantage of the new backend system at ATCA, we propose an absorption line survey of the whole 7 mm band toward the z=0.89 galaxy located in front of the bright quasar PKS1830-211. The 7mm band encompasses the rest frequency range 57--94 GHz at z=0.89, rich in molecular transitions of numerous species, more particularly deuterated and sulfur-bearing species. The unprecedented sensitivity of a few per mil of the continuum level will allow very rare molecular species to be detected, and we will compare the results to observations in Galactic clouds and nearby starburst galaxies and to chemical model predictions in order to characterize the chemistry and environment in this young and distant galaxy. We request a total of 16 hours or two nights of observation with the ATCA. This would be the first deep and broad line survey in a distant galaxy, and we aim to extend such a study to molecular absorbers at intermediate redshifts with ATCA.

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