Near-infrared spectroscopic observations of young stellar objects

Details Near-infrared spectroscopic observations of young stellar objects Near-infrared spectroscopic observations of young stellar objects

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.239..139s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 239, July 1, 1989, p. 139-151.

Astronomy and Astrophysics

Astronomy

4

Infrared Spectroscopy, Near Infrared Radiation, Pre-Main Sequence Stars, Stellar Models, Stellar Spectra, Line Spectra, Stellar Envelopes, Stellar Luminosity, Stellar Winds

Scientific paper

The paper presents medium-resolution observations of the Br-gamma and Br-alpha emission lines for 20 premain-sequence stars, most of which are low-luminosity objects. In 10 of these, strong Br-gamma emission has been detected, whose intensity exceeds that expected from the value in Case B recombination with Lyman continuum radiation from the stars. The line ratio suggests that these lines are emitted from optically thick regions. For low-luminosity stars these lines are considered to come from neutral and dense circumstellar regions.

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