Observations of molecular envelopes of late-type stars: CRL 618, CRL 2688, CRL 3068, and CIT 6

Details Observations of molecular envelopes of late-type stars: CRL 618, CRL 2688, CRL 3068, and CIT 6 Observations of molecular envelopes of late-type stars: CRL 618, CRL 2688, CRL 3068, and CIT 6

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...437..410f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 437, no. 1, p. 410-418

Astronomy and Astrophysics

Astronomy

27

Carbon Stars, Late Stars, Molecular Gases, Molecular Spectra, Radio Astronomy, Stellar Envelopes, Stellar Evolution, Stellar Spectra, Abundance, Astronomical Spectroscopy, Line Spectra, Planetary Nebulae, Radio Spectra, Radio Telescopes

Scientific paper

The HC3N, HC5N, HC7N, CCH, C4H, SiS, and HNC molecules were observed in the circumstellar envelopes of CRL 618, CRL 2688, CIT 6, and CRL 3068 with the Nobeyama 45 m radio telescope. The observed relative abundances of the cyanopolyynes, CCH, and C4H in these late-type stars are similar to those for IRC +10216. However, it was found that the abundance of HNC increased with the physical evolutionary stage of the stars. In CRL 2688, it is also found that HNC is more concentrated in the inner region than SiS. The production mechanism of HNC is discussed by considering ultraviolet radiation from the central stars. The HC3N J = 4-3 transition was observed to have a P Cygni line profile in CRL 618.

Affiliated with

Also associated with

No associations

Rating

Observations of molecular envelopes of late-type stars: CRL 618, CRL 2688, CRL 3068, and CIT 6 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observations of molecular envelopes of late-type stars: CRL 618, CRL 2688, CRL 3068, and CIT 6, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of molecular envelopes of late-type stars: CRL 618, CRL 2688, CRL 3068, and CIT 6 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1326756