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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03436naa a2200385 4500 | |
| 001 | oai:research.chalmers.se:0687834b-8ee9-4f6d-8c73-ff76e87535da | |
| 003 | SwePub | |
| 008 | 171007s2014 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://research.chalmers.se/publication/1928732 URI |
| 024 | 7 | a https://doi.org/10.1088/0004-637X/781/2/1142 DOI |
| 040 | a (SwePub)cth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a art2 swepub-publicationtype |
| 072 | 7 | a ref2 swepub-contenttype |
| 100 | 1 | a Crockett, N. R.u University of Michigan4 aut |
| 245 | 1 0 | a HERSCHEL OBSERVATIONS OF EXTRA-ORDINARY SOURCES: H2S AS A PROBE OF DENSE GAS AND POSSIBLY HIDDEN LUMINOSITY TOWARD THE ORION KL HOT CORE |
| 264 | 1 | c 2014 |
| 338 | a electronic2 rdacarrier | |
| 520 | a We present Herschel/HIFI observations of the light hydride H2S obtained from the full spectral scan of the Orion Kleinmann-Low nebula (Orion KL) taken as part of the Herschel Observations of EXtra-Ordinary Sources GT (guaranteed time) key program. In total, we observe 52, 24, and 8 unblended or slightly blended features from H2 32S, H2 34S, and H2 33S, respectively. We only analyze emission from the so-called hot core, but emission from the plateau, extended ridge, and/or compact ridge are also detected. Rotation diagrams for ortho and para H2S follow straight lines given the uncertainties and yield T rot = 141 ± 12 K. This indicates H2S is in local thermodynamic equilibrium and is well characterized by a single kinetic temperature or an intense far-IR radiation field is redistributing the population to produce the observed trend. We argue the latter scenario is more probable and find that the most highly excited states (E up gsim 1000 K) are likely populated primarily by radiation pumping. We derive a column density, N tot(H2 32S) = 9.5 ± 1.9 × 1017 cm–2, gas kinetic temperature, T kin = 120$\pm ^{13}_{10}$ K, and constrain the H2 volume density, $n_{\rm H_2}$ gsim 9 × 10 7 cm–3, for the H2S emitting gas. These results point to an H2S origin in markedly dense, heavily embedded gas, possibly in close proximity to a hidden self-luminous source (or sources), which are conceivably responsible for Orion KL's high luminosity. We also derive an H2S ortho/para ratio of 1.7 ± 0.8 and set an upper limit for HDS/H2S of | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a molecules | |
| 653 | a astrochemistry | |
| 653 | a interstellar matter | |
| 700 | 1 | a Bergin, E. A.u University of Michigan4 aut |
| 700 | 1 | a Neill, J. L.u University of Michigan4 aut |
| 700 | 1 | a Black, John H,d 1949u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)jblack |
| 700 | 1 | a Blake, G. A.u California Institute of Technology (Caltech)4 aut |
| 700 | 1 | a Kleshcheva, M.u California Institute of Technology (Caltech)4 aut |
| 710 | 2 | a University of Michiganb Chalmers tekniska högskola4 org |
| 773 | 0 | t Astrophysical Journalg 781:2, s. 114 (pp. 1-21)q 781:2<114 (pp. 1-21)x 1538-4357x 0004-637X |
| 856 | 4 | u http://publications.lib.chalmers.se/records/fulltext/192873/local_192873.pdfx primaryx freey FULLTEXT |
| 856 | 4 8 | u https://research.chalmers.se/publication/192873 |
| 856 | 4 8 | u https://doi.org/10.1088/0004-637X/781/2/114 |
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