An Interferometric Spectral Line Survey of IRC +10216 in the 345 GHz Band

Details An Interferometric Spectral Line Survey of IRC +10216 in the 345 GHz Band An Interferometric Spectral Line Survey of IRC +10216 in the 345 GHz Band

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..445..247p&link_type=abstract

Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants. Proceedings of a conference held at University Ca

Astronomy and Astrophysics

Astronomy

Scientific paper

We report a spectral-line survey of the extreme carbon star IRC +10216 carried out between 293.9 and 354.8 GHz with the Submillimeter Array. A total of 442 lines were detected, more than 200 for the first time; 145 are unassigned. Maps at an angular resolution of ˜3″ were obtained for each line. A substantial new population of narrow lines with an expansion velocity of ˜ 4 km s-1 (i.e. ˜ 30% of the terminal velocity) was detected. Most of these lines are attributed to rotational transitions within vibrationally excited states, emitted from energy levels above the v=0, J=0 ground state with excitation energies of 1000-3000 K. Emission from these lines appears to be centered on the star with an angular extent of < 1″.

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