SIMBAD references

2003ApJ...582..823O - Astrophys. J., 582, 823-829 (2003/January-2)

Observations of C3in translucent sight lines.

OKA T., THORBURN J.A., McCALL B.J., FRIEDMAN S.D., HOBBS L.M., SONNENTRUCKER P., WELTY D.E. and YORK D.G.

Abstract (from CDS):

The A1Πu⟵X1Σ+gtransition of the simplest polyatomic carbon chain molecule, C3, at 4051.6 Å has been searched for toward reddened stars where abundant C2had been reported and toward other stars with high color excess. Absorption from C3has been detected toward 15 stars with color excess E(B-V) from 0.33 to 1.12. The observed C3column densities, ranging from 1012 to 1013 cm–2, are well correlated with the corresponding C2column densities, with N(C2)/N(C3)∼40, indicating their close chemical relation. The carbon-rich sight line toward HD 204827 (for which no previous C2observation had been reported) has by far the highest C3and C2column densities. The chemistry of formation of C3 from C2is discussed. A search for the next strongest 020-000 vibronic band was unsuccessful as a result of the low Franck-Condon factor and interference with a stellar line. Searches for C4and C5were negative.

Abstract Copyright:

Journal keyword(s): Astrochemistry - ISM: Lines and Bands - ISM: Molecules

Status at CDS:  

Simbad objects: 31

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2020.04.06-15:10:37

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