Herschel-SPIRE spectroscopy of G29.96-0.02: fitting the full SED

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

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

We use the SPIRE Fourier-Transform Spectrometer (FTS) on-board the ESA Herschel Space Telescope to analyse the submillimetre spectrum of the Ultra-compact HII region G29.96-0.02. Spectral lines from species including 13CO, CO, [CI], and [NII] are detected. A sparse map of the [NII] emission shows at least one other HII region neighbouring the clump containing the UCHII. The FTS spectra are combined with ISO SWS and LWS spectra and fluxes from the literature to present a detailed spectrum of the source spanning three orders of magnitude in wavelength. The quality of the spectrum longwards of 100 {\mu}m allows us to fit a single temperature greybody with temperature 80.3\pm0.6K and dust emissivity index 1.73\pm0.02, an accuracy rarely obtained with previous instruments. We estimate a mass of 1500 Msol for the clump containing the HII region. The clump's bolometeric luminosity of 4 x 10^6 Lsol is comparable to, or slightly greater than, the known O-star powering the UCHII region.

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

J. M. Kirk, E. Polehampton, L. D. Anderson, J. -P. Baluteau, Sylvain Bontemps, et al.. Herschel-SPIRE spectroscopy of G29.96-0.02: fitting the full SED. Astronomy and Astrophysics - A&A, 2010, 518, pp.L82. ⟨10.1051/0004-6361/201014625⟩. ⟨hal-00523495⟩