Tentative Detection of C4H- toward the Low-Mass Protostar IRAS 04368+2557 in L1527

Details Tentative Detection of C4H- toward the Low-Mass Protostar IRAS 04368+2557 in L1527 Tentative Detection of C4H- toward the Low-Mass Protostar IRAS 04368+2557 in L1527

Jan 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008apj...673l..71s&link_type=abstract

The Astrophysical Journal, Volume 673, Issue 1, pp. L71-L74.

Astronomy and Astrophysics

Astronomy

25

Ism: Individual: Alphanumeric: L1527, Ism: Molecules

Scientific paper

The millimeter-wave rotational emission line (J=9-8) of the negative ion, C4H-, has tentatively been detected toward the low-mass Class 0 protostar IRAS 04368+2557 in L1527 with the IRAM 30 m telescope. The column density of C4H- is determined to be 1.1×1010 cm-2. The [C4H-]/[C4H] ratio is found to be 6.8×10-5, which is much lower than the [C6H-]/[C6H] ratio (0.093). From this result, the rate coefficient for the radiative attachment reaction between C4H and electron is estimated to be as small as 3×10-11 cm3s-1 on the basis of the simplified chemical model. The present observation has demonstrated the uniqueness and importance of L1527 in searching for a new carbon-chain molecule in a star-forming region.

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