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2007A&A...464..995P - Astronomy and Astrophysics, volume 464, 995-1002 (2007/3-4)
Helium abundance and ionization structure in the Orion nebula: radio recombination lines observations.
POPPI S., TSIVILEV A.P., CORTIGLIONI S., PALUMBO G.G.C. and SOROCHENKO R.L.
Abstract (from CDS):
Abstract Copyright: ∼
Journal keyword(s): ISM: abundances - ISM: HII regions - radio lines: ISM - ISM: individual objects: Orion Nebula
Simbad objects: 7
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