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Herschel spectral surveys of star-forming regions : overview of the 555-636 GHz range
- Source :
- Astronomy & Astrophysics, 521, pp. L22, Astronomy & Astrophysics, 521, L22, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 521, pp.L22. ⟨10.1051/0004-6361/201015081⟩, Astronomy and Astrophysics-A&A, 2010, 521, pp.L22. ⟨10.1051/0004-6361/201015081⟩, Astronomy & Astrophysics, 521. EDP Sciences, Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 521, pp.L22, Astronomy & astrophysics, 521:L22. EDP Sciences
- Publication Year :
- 2010
-
Abstract
- International audience; 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 http://www.aanda.org
- Subjects :
- 010504 meteorology & atmospheric sciences
Stellar mass
Astronomy
Astrophysics
01 natural sciences
Spectral line
Luminosity
I(N)
0103 physical sciences
Protostar
WATER
MASSIVE YOUNG STARS
Spectral resolution
010303 astronomy & astrophysics
GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries)
MILLIMETER
ComputingMilieux_MISCELLANEOUS
0105 earth and related environmental sciences
QB
NGC 6334 I
Physics
stars: formation
Spectrometer
Star formation
[SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
astrochemistry
Research Programm of Institute for Mathematics, Astrophysics and Particle Physics
PROTOSTARS
Astronomy and Astrophysics
[PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
DEUTERATED FORMALDEHYDE
HOT CORE
Space and Planetary Science
Satellite
PROTOSTELLAR SHOCK L1157-B1
SUBMILLIMETER
Subjects
Details
- ISSN :
- 00046361
- Database :
- OpenAIRE
- Journal :
- Astronomy & Astrophysics, 521, pp. L22, Astronomy & Astrophysics, 521, L22, Astronomy and Astrophysics-A&A, Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 521, pp.L22. ⟨10.1051/0004-6361/201015081⟩, Astronomy and Astrophysics-A&A, 2010, 521, pp.L22. ⟨10.1051/0004-6361/201015081⟩, Astronomy & Astrophysics, 521. EDP Sciences, Astronomy and Astrophysics-A&A, EDP Sciences, 2010, 521, pp.L22, Astronomy & astrophysics, 521:L22. EDP Sciences
- Accession number :
- edsair.doi.dedup.....2dc3b704eb09ac96fcc6ac1658599046
- Full Text :
- https://doi.org/10.1051/0004-6361/201015081⟩