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Title:
Detection of deuterium Balmer lines in the Orion Nebula
Authors:
Hébrard, G.; Péquignot, D.; Vidal-Madjar, A.; Walsh, J. R.; Ferlet, R.
Affiliation:
AA(Institut d'Astrophysique de Paris, CNRS, 98 bis Boulevard Arago, 75014 Paris, France ), AB(Laboratoire d'Astrophysique Extragalactique et de Cosmologie associé au CNRS (UMR 8631) et àl'Université Paris 7, DAEC, Observatoire de Paris-Meudon, 92195 Meudon Cédex, France ), AC(Institut d'Astrophysique de Paris, CNRS, 98 bis Boulevard Arago, 75014 Paris, France ), AD(Space Telescope European Co-ordinating Facility, European Southern Observatory, Karl-Schwarzschild-Strasse 2, 85748 Garching bei München, Germany ), AE(Institut d'Astrophysique de Paris, CNRS, 98 bis Boulevard Arago, 75014 Paris, France )
Publication:
Astronomy and Astrophysics, v.354, p.L79-L82 (2000) (A&A Homepage)
Publication Date:
02/2000
Origin:
A&A
Astronomy Keywords:
LINE: FORMATION, LINE: IDENTIFICATION, ISM: ATOMS, IONS, ISM: H II REGIONS, ISM: INDIVIDUAL OBJECTS: M42, COSMOLOGY: OBSERVATIONS
Bibliographic Code:
2000A&A...354L..79H

Abstract

The detection and first identification of the deuterium Balmer emission lines, Dalpha and Dbeta , in the core of the Orion Nebula is reported. These lines are very narrow, have identical 11 km s-1 velocity shifts with respect to Hα and Hβ , are probably excited by UV continuum fluorescence from the Lyman (D I) lines and arise from the interface between the H Ii\ region and the molecular cloud. Based on observations collected at the Canada-France-Hawaii Telescope, Hawaii, USA.

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