Long Carbon-chain Molecules and Their Anions in the Starless Core, Lupus-1A

Details Long Carbon-chain Molecules and Their Anions in the Starless Core, Lupus-1A Long Carbon-chain Molecules and Their Anions in the Starless Core, Lupus-1A

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...718l..49s&link_type=abstract

The Astrophysical Journal Letters, Volume 718, Issue 2, pp. L49-L52 (2010).

Astronomy and Astrophysics

Astronomy

8

Ism: Individual Objects: Lupus, Ism: Molecules

Scientific paper

We have recently discovered a new starless core with bright radio emissions of long carbon-chain molecules in the Lupus molecular cloud, which we have named as Lupus-1A. Toward this source, the peak intensities of the C6H and C8H lines are found to be higher than toward TMC-1 by a factor of 2-3. Even the lines of their anions, C6H- and C8H-, are also brighter than in TMC-1. Moreover, the line of C4H- has been detected for the first time in a starless core. The column densities of these long carbon-chain molecules are almost comparable to those in TMC-1, and hence, this source can be regarded as the second "TMC-1 like cloud." TMC-1 has long been an outstanding molecular cloud with rich carbon-chain molecules since its discovery in 1976. In spite of extensive efforts, no comparable sources have been found so far. Lupus-1A will be used for hunting of new interstellar molecules as well as understanding of carbon-chain chemistry through critical comparison of physical and chemical properties with TMC-1. This source is important not only for astronomy but also for molecular science as an ideal spectroscopic laboratory because of narrow line shapes and bright intensities.

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