CN in circumstellar envelopes survey (Bachiller+ 1997)

Details CN in circumstellar envelopes survey (Bachiller+ 1997) CN in circumstellar envelopes survey (Bachiller+ 1997)

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat..33190235b&link_type=abstract

VizieR On-line Data Catalog: J/A+A/319/235. Originally published in: 1997A&A...319..235B

Computer Science

Stars: Giant, Abundances

Scientific paper

We list in Table 1 the observed stars together with some of their characteristics. Distances, expansion velocities, mass loss rates, and spectral types are taken from the compilations of Bujarrabal et al. (1994) and Loup et al. (1993A&AS...99..291). The sample includes C-rich and O-rich objects, some S-stars, a few proto-PN, and a young PN (NGC7027). See paper for more details. In Table 2, we give some of the observational parameters. Alow and Ahigh refer to the integrated intensity of the low-frequency and high-frequency fine-structure groups. The intrinsic intensity ratios, R=Ahigh/Alow, are R(1-0)=2 and R(2-1)=1.8. In principle, the observation of several components with different intrinsic strengths allows an estimate of the line optical depth, and the value of R gives an estimate of the envelope thickness. (2 data files).

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