Herschel-SPIRE spectroscopy of the DR21 molecular cloud core

作者：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

来源：Astronomy & Astrophysics, 2010, 518: L114.

DOI：10.1051/0004-6361/201014622

• ISM: lines and bands
• infrared: ISM
• ISM: molecules

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, (13)CO, HCO(+) and H(2)O, 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).

• 出版日期2010-8
• 单位中国地震局