Detection of deuterium Balmer lines in the Orion Nebula
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- February 2000
- DOI:
- 10.48550/arXiv.astro-ph/0002141
- arXiv:
- arXiv:astro-ph/0002141
- Bibcode:
- 2000A&A...354L..79H
- Keywords:
-
- LINE: FORMATION;
- LINE: IDENTIFICATION;
- ISM: ATOMS;
- IONS;
- ISM: H II REGIONS;
- ISM: INDIVIDUAL OBJECTS: M42;
- COSMOLOGY: OBSERVATIONS;
- Astrophysics
- E-Print:
- 4 pages, latex, 1 figure, 1 table, accepted for publication in Astronomy &