Peculiar optical spectrum of the Red Rectangle

Details Peculiar optical spectrum of the Red Rectangle Peculiar optical spectrum of the Red Rectangle

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.292..317w&link_type=abstract

Nature, vol. 292, July 23-29, 1981, p. 317-319.

Computer Science

48

Emission Spectra, Line Spectra, Nebulae, Optical Emission Spectroscopy, Stellar Spectra, Absorption Spectra, Balmer Series, D Lines, H Lines, High Resolution, Interstellar Matter, K Lines, Molecular Clouds

Scientific paper

The Red Rectangle is a nebula centered on the star HD 44179. Within an amorphous blue nebula is embedded a hollow biconical red nebula with apex at the star. The generators of the hollow bicone show in projection as four spikes radiating from HD 44179. The bicone has a hitherto totally unidentified spectrum. In high resolution spectra of the nebula a narrow-line component (Na D, Ca H and K, H-alpha) from a low excitation plasma has been identified, and broader features presumably from molecular bands have been resolved. Constraints on the molecules responsible are given, and carbyne (linear chains of carbon with alternate single and triple bonds) is proposed as a candidate. The Red Rectangle may thus be a factory for the production of the raw material from which some interstellar molecules are made.

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