Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...264..554l&link_type=abstract
Astrophysical Journal, Part 1, vol. 264, Jan. 15, 1983, p. 554-559.
Astronomy and Astrophysics
Astronomy
36
A Stars, B Stars, Emission Spectra, Herbig-Haro Objects, Infrared Astronomy, Stellar Spectra, Bremsstrahlung, Cosmic Dust, Near Infrared Radiation, Stellar Envelopes
Scientific paper
Near-infrared photometric data in the J, H, K, L, and M bands are presented for a sample of Ae-Be stars associated with nebulosity. The mechanism of the emission is examined, and the observational data are compared with theoretical models to account for the infrared excess. A model is developed to account for the observations in which the main source of IR emission is the bremsstrahlung from H2(-). Several exceptions, including LkH-alpha 198, R Mon, and LkH-alpha 233, are examined. It is found that two of the stars, BD plus 41.3731 degrees and LkH-alpha 215 do not show appreciable IR excess.
Lorenzetti Dario
Saraceno Paolo
Strafella Francesco
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