CRL 2688 - A post-carbon-star object and probable planetary nebula progenitor

Details CRL 2688 - A post-carbon-star object and probable planetary nebula progenitor CRL 2688 - A post-carbon-star object and probable planetary nebula progenitor

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...205l..15z&link_type=abstract

Astrophysical Journal, vol. 205, Apr. 1, 1976, pt. 2, p. L15-L19. Research supported by the Science Research Council

Astronomy and Astrophysics

Astronomy

109

Carbon Compounds, Carbon Stars, Giant Stars, Infrared Spectra, Molecular Spectra, Planetary Nebulae, Stellar Evolution, Cyanoacetylene, Hydrocyanic Acid, Infrared Astronomy, Millimeter Waves, Stellar Envelopes

Scientific paper

Observations are reported for millimeter-wavelength emission toward CRL 2688 from H(C-12)N, H(C-13)N, CS, and HC3N. The similarity of this emission and that from the molecular envelope of the carbon star IRC +10216 establishes, beyond a reasonable doubt, that CRL 2688 is a post-carbon-star object. It appears probable that both of these objects will evolve into planetary nebulae. An evolutionary sequence leading from carbon stars to planetary nebulae is outlined.

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