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2010A&A...518L.114W - Astronomy and Astrophysics, volume 518, L114-114 (2010/7-2)

Herschel-SPIRE spectroscopy of the DR 21 molecular cloud core.

WHITE G.J., ABERGEL A., SPENCER L., SCHNEIDER N., NAYLOR D.A., ANDERSON L.D., JOBLIN C., ADE P., ANDRE P., ARAB H., BALUTEAU J.-P., BERNARD J.-P., BLAGRAVE K., BONTEMPS S., BOULANGER F., COHEN M., COMPIEGNE M., COX P., DARTOIS E., DAVIS G., EMERY R., FULTON T., GOM B., GRIFFIN M., GRY C., HABART E., HUANG M., JONES S., KIRK J.M., LAGACHE G., LEEKS S., LIM T., MADDEN S., MAKIWA G., MARTIN P., MIVILLE-DESCHENES M.-A., MOLINARI S., MOSELEY H., MOTTE F., OKUMURA K., PINHEIRO GONCALVES D., POLEHAMPTON E., RODET T., RODON J.A., RUSSEIL D., SARACENO P., SIDHER S., SWINYARD B.M., WARD-THOMPSON D. and ZAVAGNO A.

Abstract (from CDS):

We present far-infrared spectra and maps of the DR21 molecular cloud core between 196 and 671µm, using the Herschel-SPIRE spectrometer. Nineteen molecular lines originating from CO, 13CO, HCO+ and H2O, plus lines of [N ii] and [CI] were recorded, including several transitions not previously detected. The CO lines are excited in warm gas with Tkin ∼125 K and nH2∼7x104cm–3, CO column density N(CO) ∼3.5x1018cm–2 and a filling factor of ∼12%, and appear to trace gas associated with an outflow. The rotational temperature analysis incorporating observations from ground-based telescopes reveals an additional lower excitation CO compoment which has a temperature ∼78K and N(CO) ∼4.5x1021cm–2.

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Journal keyword(s): ISM: lines and bands - infrared: ISM - ISM: molecules

Simbad objects: 4

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