The SiS Maser in the Late Type Carbon Star IRC+10216

Details The SiS Maser in the Late Type Carbon Star IRC+10216 The SiS Maser in the Late Type Carbon Star IRC+10216

Apr 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atnf.prop..226h&link_type=abstract

ATNF proposal C1560, Semester: April, 2006

Physics

Stellar, Atca

Scientific paper

More than twenty years ago we found a spectral feature that may have been the first maser ever detected in the circumstellar shell of a carbon star. Its frequency, however, inhibited verification. Thanks to ATCA, being the first interferometer operating at 18 GHz, the line, i.e. the J=1-0 transition of SiS, finally becomes observable with high angular resolution. We plan to observe SiS, (1) to confirm the presence of a maser, (2) to confirm the expected pumping scenario involving intense infrared radiation, (3) to determine extent and brightness temperature, and (4) to check in how far a stellar background is affecting the observed emission. The HC3N J=2-1 line will be measured simultaneously to map for the first time a cyanopolyne transition of low excitation in this prototypical source.

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