2010A&A...521L..22C

Query : 2010A&A...521L..22C

2010A&A...521L..22C - Astronomy and Astrophysics, volume 521, L22-22 (2010/10-1)

Herschel spectral surveys of star-forming regions. Overview of the 555-636 GHz range.

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. and MELCHIOR M.

Abstract (from CDS):

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 2x105L☉: 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 1MHz. They cover the frequency range 555-636GHz, 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.

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Journal keyword(s): astrochemistry - stars: formation

Simbad objects: 10

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Number of rows : 10
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 862 0
2 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 437 1
3 V* V2457 Ori Or* 05 35 26.97000 -05 09 54.4644         18.858 ~ 151 0
4 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1252 1
5 NAME IRAS 16293E cor 16 32 29.060 -24 29 10.27           ~ 58 1
6 NGC 6334 HII 17 20 53 -36 07.9           ~ 682 0
7 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 342 0
8 NAME W 51 IRS 1 HII 19 23 41.9 +14 30 36           ~ 113 0
9 RAFGL 2591 Y*O 20 29 24.8230 +40 11 19.590           ~ 622 0
10 [DE95] LDN 1157 B1 out 20 39 11 +68 01.3           ~ 251 0

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