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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 559119.0, MPI für Astronomie / Publikationen_mpia
Herschel spectral surveys of star-forming regions. Overview of the 555-636 GHz range
Authors:Ceccarelli, C.; Bacmann, A.; Boogert, A.; Caux, E.; Dominik, C.; Lefloch, B.; Lis, D.; Schilke, P.; van der Tak, F.; Caselli, P.; Cernicharo, J.; Codella, C.; Comito, C.; Fuente, A.; Baudry, A.; Bell, T.; Benedettini, M.; Bergin, E. A.; Blake, G. A.; Bottinelli, S.; Cabrit, S.; Castets, A.; Coutens, A.; Crimier, N.; Demyk, K.; Encrenaz, P.; Falgarone, E.; Gerin, M.; Goldsmith, P. F.; Helmich, F.; Hennebelle, P.; Henning, T.; Herbst, E.; Hily-Blant, P.; Jacq, T.; Kahane, C.; Kama, M.; Klotz, A.; Langer, W.; Lord, S.; Lorenzani, A.; Maret, S.; Melnick, G.; Neufeld, D.; Nisini, B.; Pacheco, S.; Pagani, L.; Parise, B.; Pearson, J.; Phillips, T.; Salez, M.; Saraceno, P.; Schuster, K.; Tielens, X.; van der Wiel, M. H. D.; Vastel, C.; Viti, S.; Wakelam, V.; Walters, A.; Wyrowski, F.; Yorke, H.; Liseau, R.; Olberg, M.; Szczerba, R.; Benz, A. O.; Melchior, M.
Language:English
Date of Publication (YYYY-MM-DD):2010
Title of Journal:Astronomy and Astrophysics
Volume:521
Start Page:id.L22
Review Status:not specified
Audience:Experts Only
Abstract / Description: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 × 105 L_ȯ: 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. Herschel is an ESA space observatory with science instruments provided by European-led principal Investigator consortia and with important participation from NASA.Figures [see full textsee full text]-[see full textsee full text] and Tables 3, 4 (pages 6 to 8) are only available in electronic form at <A href="http://www.aanda.org">http://www.aanda.org</A>
Free Keywords:astrochemistry; stars: formation
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2010A%26A...521L..2... [ID No:1]
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