<i>Herschel</i>-SPIRE spectroscopy of the DR21 molecular cloud core
- White, G. J.
- Abergel, A.
- Spencer, L.
- Schneider, N.
- Naylor, D. A.
- Anderson, L. D.
- Joblin, C.
- Ade, P.
- André, 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-Deschênes, M.-A.
- Molinari, S.
- Moseley, H.
- Motte, F.
- Okumura, K.
- Pinheiro Gonçalves, D.
- Polehampton, E.
- Rodet, T.
- Rodón, J. A.
- Russeil, D.
- Saraceno, P.
- Sidher, S.
- Swinyard, B. M.
- Ward-Thompson, D.
- Zavagno, A.
DOIAbstract
We present far-infrared spectra and maps of the DR21 molecular cloud core between 196 and 671 μm, 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 ~ 7×104 cm-3, CO column density N(CO) ~ 3.5×1018 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) ~ 4.5×1021 cm-2
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