arxiv: 1005.2874 · v1 · pith:U4G2BA4Gnew · submitted 2010-05-17 · 🌌 astro-ph.GA

Herschel-SPIRE spectroscopy of the DR21 molecular cloud core

Glenn J. White , A. Abergel , L. Spencer , N. Schneider , D.A. Naylor , L.D. Anderson , C. Joblin , P. Ade

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P. Andr\'e H. Arab J.-P. Baluteau J.-P. Bernard K. Blagrave S. Bontemps F. Boulanger M. Cohen M. Compiegne P. Cox E. Dartois G. Davis R. Emery T. Fulton B. Gom M. Griffin C. Gry E. Habart M. Huang S. Jones J.M. Kirk G. Lagache S. Leeks T. Lim S. Madden G. Makiwa P. Martin M.-A. Miville-Desch\^enes S. Molinari H. Moseley F. Motte K. Okumura D. Pinheiro Gocalvez E. Polehampton T. Rodet J.A. Rod\'on D. Russeil P. Saraceno S. Sidher B.M. Swinyard D. Ward-Thompson A. Zavagno

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keywords linesmolecularcloudcoredr21herschel-spiretemperatureadditional

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We present far-infrared spectra and maps of the DR21 molecular cloud core between 196 and 671 microns, 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 ~ 7 x 10^4 cm-3, CO column density N(CO) ~ 3.5 x 10^18 cm^-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 ~ 78 K and N(CO) ~ 4.5 x 10^21 cm^-2. Astronomy & Astrophysics HERSCHEL special Issue, in press.

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Herschel-SPIRE spectroscopy of the DR21 molecular cloud core

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