SIMBAD references

2008A&A...478L..19A - Astronomy and Astrophysics, volume 478, L19-22 (2008/1-4)

Search for anions in molecular sources: C4H detection in L1527.

AGUNDEZ M., CERNICHARO J., GUELIN M., GERIN M., McCARTHY M.C. and THADDEUS P.

Abstract (from CDS):

We present the results of a search for the negative ion C4H in various dark clouds, low mass star-forming regions and photon-dominated regions (PDRs). We have also searched for C6H, C2H and CN in some of the sources. The millimeter-wave observations were carried out with the IRAM-30m telescope. We detect C4H, through the J=9-8 and J=10-9 rotational transitions, in the low mass star-forming region L1527. We thus confirm the tentative detection of the J=9-8 line recently reported toward this source. The [C4H]/[C4H] ratio found is 0.011%, which is slightly lower than the value observed in IRC +10216, 0.024%, but above the 3σ upper limit we derive in TMC-1, <0.0052%. We have also derived an upper limit for the [C6H]/[C6H] ratio in the Horsehead Nebula, and for various anion-to-neutral ratios in the observed sources. These results are compared with recent chemical models.

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Journal keyword(s): astrochemistry - ISM: molecules - radio lines: ISM

Simbad objects: 11

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2019.12.05-23:05:09

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