Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...233..132s&link_type=abstract
Astrophysical Journal, Part 1, vol. 233, Oct. 1, 1979, p. 132-139.
Astronomy and Astrophysics
Astronomy
16
Astronomical Spectroscopy, Early Stars, Infrared Astronomy, Orion Nebula, Emission Spectra, Hydrogen, Line Spectra, Masers, Optical Thickness
Scientific paper
Spectra of the Becklin-Neugebauer source in Orion and the associated nebula are presented covering the complete range from 3.3-5.5 microns with a resolution of 1.2 kaysers. The data were taken in December 1976 and February 1978. Atomic hydrogen emission lines of Brackett-alpha and Pfund-beta are seen, as well as molecular CO absorptions. No other features intrinsic to BN were detected. The December 1976 data show an anomalously high intensity for Pfund-beta line. Theoretical considerations are presented which suggest that Pfund-beta radiation arises in a small dense region, with the transition possibly lasing.
Fink Uwe
Larson Harold P.
Smith Harold A.
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