First observations of circumstellar envelopes with the IRAM 30-m telescope

Details First observations of circumstellar envelopes with the IRAM 30-m telescope First observations of circumstellar envelopes with the IRAM 30-m telescope

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...154l..12l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 154, no. 1-2, Jan. 1986, p. L12-L15.

Astronomy and Astrophysics

Astrophysics

42

Infrared Telescopes, Line Spectra, Millimeter Waves, Stellar Envelopes, Stellar Spectrophotometry, Sulfur Dioxides, Hydrocarbons, Hydrocyanic Acid, Interstellar Masers, Nebulae

Scientific paper

The first results of observations of circumstellar envelopes with the IRAM 30 m telescope are reported, including the detection of SO2 in the envelopes of oxygen-rich stars. The J = 1-0 line of the (0,2,0) vibrationally excited state of HCN is probably identified in the nearby massive carbon shell IRC + 10216, with an unusual profile which could be due to maser emission. CS-33 is detected in this source along with six new unidentified lines; HCO(+) is not found in it. C4H, SiC2, and H(C-13)CCN are detected in CRL2688 (the Egg Nebula), in which C4H seems enhanced and silicon depleted with respect to IRC + 10216.

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