Ceccarelli, C. and Boogert, A. and Lis, D. and Bell, T. and Blake, G. A. and Lord, S. and Phillips, T. (2010) Herschel spectral surveys of star-forming regions: Overview of the 555–636 GHz range. Astronomy and Astrophysics, 521 . L22. ISSN 0004-6361 http://resolver.caltech.edu/CaltechAUTHORS:20101213-112640910
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High resolution line spectra of star-forming regions are mines of information: they provide unique clues to reconstruct the chemical, dynamical, and physical structure of the observed source. We present the first results from the Herschel key project “Chemical HErschel Surveys of Star forming regions”, CHESS. We report and discuss observations towards five CHESS targets, one outflow shock spot and four protostars with luminosities bewteen 20 and 2 × 10^(5) L_☉: L1157-B1, IRAS 16293-2422, OMC2-FIR4, AFGL 2591, and NGC 6334I. The observations were obtained with the heterodyne spectrometer HIFI on board Herschel, with a spectral resolution of 1 MHz. They cover the frequency range 555–636 GHz, a range largely unexplored before the launch of the Herschel satellite. A comparison of the five spectra highlights spectacular differences in the five sources, for example in the density of methanol lines, or the presence/absence of lines from S-bearing molecules or deuterated species. We discuss how these differences can be attributed to the different star-forming mass or evolutionary status.
|Additional Information:||© 2010 ESO. Received 29 May 2010; Accepted 7 July 2010; Published online 01 October 2010. Herschel is an ESA space observatory with science instruments provided by European-led principal Investigator consortia and with important participation from NASA. HIFI has been designed and built by a consortium of institutes and university departments from across Europe, Canada and the United States under the leadership of SRON Netherlands Institute for Space Research, Groningen, The Netherlands and with major contributions from Germany, France abd the US. Consortium members are: Canada: CSA, U. Waterloo; France: CESR, LAB, LERMA, IRAM; Germany: KOSMA, MPIfR, MPS; Ireland, NUI Maynooth; Italy: ASI, IFSI-INAF, Osservatorio Astrofisico di Arcetri-INAF; Netherlands: SRON, TUD; Poland: CAMK, CBK; Spain: Observatorio Astronómico Nacional (IGN), Centro de Astrobiología (CSIC-INTA). Sweden: Chalmers University of Technology – MC2, RSS & GARD; Onsala Space Observatory; Swedish National Space Board, Stockholm University – Stockholm Observatory; Switzerland: ETH Zurich, FHNW; USA: Caltech, JPL, NHSC. We thank many funding agencies for financial support.|
|Subject Keywords:||astrochemistry; stars: formation|
|Official Citation:||Herschel spectral surveys of star-forming regions - Overview of the 555–636 GHz range C. Ceccarelli, A. Bacmann, A. Boogert, E. Caux, C. Dominik, B. Lefloch, D. Lis, P. Schilke, F. van der Tak, P. Caselli, J. Cernicharo, C. Codella, C. Comito, A. Fuente, A. Baudry, T. Bell, M. Benedettini, E. A. Bergin, G. A. Blake, S. Bottinelli, S. Cabrit, A. Castets, A. Coutens, N. Crimier, K. Demyk, P. Encrenaz, E. Falgarone, M. Gerin, P. F. Goldsmith, F. Helmich, P. Hennebelle, T. Henning, E. Herbst, P. Hily-Blant, T. Jacq, C. Kahane, M. Kama, A. Klotz, W. Langer, S. Lord, A. Lorenzani, S. Maret, G. Melnick, D. Neufeld, B. Nisini, S. Pacheco, L. Pagani, B. Parise, J. Pearson, T. Phillips, M. Salez, P. Saraceno, K. Schuster, X. Tielens, M. H. D. van der Wiel, C. Vastel, S. Viti, V. Wakelam, A. Walters, F. Wyrowski, H. Yorke, R. Liseau, M. Olberg, R. Szczerba, A. O. Benz and M. Melchior A&A 521 L22 (2010) DOI: 10.1051/0004-6361/201015081|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||20 Dec 2010 21:29|
|Last Modified:||26 Dec 2012 12:45|
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