Comets with ALMA

Details Comets with ALMA Comets with ALMA

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005esasp.577..151b&link_type=abstract

In: Proceedings of the dusty and molecular universe: a prelude to Herschel and ALMA, 27-29 October 2004, Paris, France. Ed. by A

Astronomy and Astrophysics

Astronomy

2

Solar System: Comets, Molecules, Radioastronomy

Scientific paper

Observations of comets with ALMA will bring a step forward in our understanding of cometary atmospheres. Key information on several topics will be obtained: (i) the relative abundances of molecules and isotopes which are indicators of the origin of cometary material; (ii) the comparison between the composition of comets coming from the Oort Cloud and those formed in the Kuiper Belt; (iii) the monitoring of comet outgassing with heliocentric distance; (iv) the imaging of gas jets and their relation with dust features; (v) the study of comet atmospheric properties and characterization of molecular distributed sources. ALMA will have a sensitivity over one order of magnitude larger than current best radio-telescopes. To illustrate its capabilities we present signal-to-noise ratios expected for the returns of 3 periodic comets in 2010-2011 and for a typical bright comet coming from the Oort Cloud.

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