Millimetre observations of infrared carbon stars

Free access article

Issue		A&A Volume 390, Number 2, August I 2002


Page(s)		501 - 510
Section		Galactic structure and dynamics
DOI		http://dx.doi.org/10.1051/0004-6361:20020727

A&A 390, 501-510 (2002)
DOI: 10.1051/0004-6361:20020727

I. The data

M. A. T. Groenewegen¹, M. Sevenster², H. W. W. Spoon³ and I. Pérez^{2, 4}

¹ Instituut voor Sterrenkunde, PACS-ICC, Celestijnenlaan 200B, 3001 Heverlee, Belgium
² Mount Stromlo and Siding Spring Observatory, Cotter road, Weston ACT, Australia
³ Kapteyn Astronomical Institute, Postbus 800, 9700 AV, Groningen, The Netherlands
⁴ Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile

(Received 1 March 2002 / Accepted 15 May 2002)

Abstract
Millimetre observations of IRAS selected red carbon stars are presented. About 260 stars have been observed with SEST and IRAM in the CO (1-0) and CO (2-1) lines and partially in HCN (1-0) and SiO (3-2). An overall detection rate, in at least one line, of about 80% is achieved. The survey represents the second largest survey for AGB stars, and the largest ever for carbon stars. Two new detections in SiO (3-2) in carbon stars are reported. When available, the SiO/HCN and HCN/CO (1-0) line ratios are consistent with the ratios expected for carbon stars.

Key words: circumstellar matter -- stars: mass-loss -- stars: AGB and post-AGB

Offprint request: M. Groenewegen, groen@ster.kuleuven.ac.be

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