High sensitivity molecular line observations of IRC + 10216

Details High sensitivity molecular line observations of IRC + 10216 High sensitivity molecular line observations of IRC + 10216

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...107..128o&link_type=abstract

Astronomy and Astrophysics, vol. 107, no. 1, Mar. 1982, p. 128-144. Research supported by the Statens Naturvetenskapliga Forskn

Astronomy and Astrophysics

Astrophysics

171

Carbon Stars, Late Stars, Line Spectra, Molecular Spectra, Stellar Models, Stellar Spectrophotometry, Abundance, Brightness Temperature, Carbon Monoxide, Cyanoacetylene, Masers, Signal To Noise Ratios, Silicon Oxides, Stellar Envelopes, Stellar Evolution, Stellar Spectra, Supergiant Stars

Scientific paper

High sensitivity molecular line observations of the carbon star IRC + 10216 are studied. Spatial maps of the SiO, SiS, HCN, H(C-13)N, HNC, and HC3N lines are obtained in addition to high signal-to-noise ratio on-source spectra of various molecular transitions. No appreciable difference in expansion velocity is found among the molecules, and it is shown that the projected size of the molecular emissions decreases with increasing velocity offset from the stellar velocity. The line profiles, which are asymmetric in the sense that the blue shifted emission is weaker than the red-shifted ones, are discussed, and it is suggested that self-absorption by low excitation gas in the outer parts of the circumstellar envelope or departures from spherical symmetry are possible explanations. Fractional molecular abundances are also estimated, showing results lower than those predicted by theory for the Si-species, SiO and SiS.

Affiliated with

Also associated with

No associations

Rating

High sensitivity molecular line observations of IRC + 10216 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 High sensitivity molecular line observations of IRC + 10216, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High sensitivity molecular line observations of IRC + 10216 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1014091