Herschel-SPIRE spectroscopy of the DR21 molecular cloud core

Glenn J. White (1, 2) , A. Abergel (3) , L. Spencer , N. Schneider (4) , D. A. Naylor , L. D. Anderson (5) , C. Joblin (6) , P. Ade , P. André (7) , H. Arab , J. -P. Baluteau (5) , J. -P. Bernard , K. Blagrave , Sylvain Bontemps (8, 9, 10, 11) , F. Boulanger (3) , M. Cohen , M. Compiegne , P. Cox , E. Dartois (3) , G. Davis (12) , R. Emery , T. Fulton , B. Gom , M. Griffin (13) , C. Gry (5) , E. Habart (3) , M. Huang (14) , S. Jones (15, 16) , J. M. Kirk , Guilaine Lagache (3) , S. Leeks (1) , T. Lim (17) , S. Madden (18) , G. Makiwa , P. Martin (19) , M. -A. Miville-Deschênes (3) , S. Molinari (20) , H. Moseley , F. Motte (4, 21) , K. Okumura , D. Pinheiro Gocalvez , E. Polehampton , T. Rodet , J. A. Rodón , D. Russeil (5) , P. Saraceno (20) , S. Sidher , B. M. Swinyard , D. Ward-Thompson (13) , Annie Zavagno (5, 22)

1 RAL - STFC Rutherford Appleton Laboratory
2 Department of Physics and Astronomy [Milton Keynes]
3 IAS - Institut d'astrophysique spatiale
4 AIM (UMR7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
5 LAM - Laboratoire d'Astrophysique de Marseille
6 CESR - Centre d'étude spatiale des rayonnements
7 LINA - Laboratoire d'Informatique de Nantes Atlantique
8 LAB - Laboratoire d'Astrophysique de Bordeaux [Pessac]
9 OASU - Observatoire aquitain des sciences de l'univers
10 UB - Université Sciences et Technologies - Bordeaux 1
11 L3AB - Laboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux
12 Department of Ecology and Evolutionary Biology [Princeton]
13 School of Physics and Astronomy [Cardiff]
14 NAOC - National Astronomical Observatories [Beijing]
15 ART - Agroscope Reckenholz - Tänikon
16 CEH - Centre for Ecology and Hydrology
17 LPMA - Laboratoire de Probabilités et Modèles Aléatoires
18 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
19 CITA
20 IFSI - Istituto di Fisica dello Spazio Interplanetario
21 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
22 OAMP - Observatoire Astronomique de Marseille Provence

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.

Domaines: Astrophysique stellaire et solaire [astro-ph.SR]; Astrophysique stellaire et solaire [astro-ph.SR]

Glenn J. White, A. Abergel, L. Spencer, N. Schneider, D. A. Naylor, et al.. Herschel-SPIRE spectroscopy of the DR21 molecular cloud core. Astronomy and Astrophysics - A&A, 2010, 518, pp.L114. ⟨10.1051/0004-6361/201014622⟩. ⟨hal-00523032⟩