Journal
ASTRONOMY & ASTROPHYSICS
Volume 518, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201014622
Keywords
ISM: lines and bands; infrared: ISM; ISM: molecules
Categories
Funding
- CSA (Canada)
- NAOC (China)
- CEA (France)
- CNES (France)
- CNRS (France)
- ASI (Italy)
- MCINN (Spain)
- Stockholm Observatory (Sweden)
- STFC (UK)
- NASA (USA)
- Science and Technology Facilities Council [PP/D000963/1, ST/G002533/1] Funding Source: researchfish
- STFC [ST/G002533/1, PP/D000963/1] Funding Source: UKRI
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We present far-infrared spectra and maps of the DR21 molecular cloud core between 196 and 671 mu m, using the Herschel-SPIRE spectrometer. Nineteen molecular lines originating from CO, (CO)-C-13, 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 T-kin similar to 125 K and n(H2) similar to 7x10(4) cm(-3), CO column density N(CO) similar to 3.5x10(18) cm(-2) and a filling factor of similar to 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 similar to 78 K and N(CO) similar to 4.5x10(21) cm(-2).
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