Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....40..441s&link_type=abstract
Astronomy and Astrophysics, vol. 40, no. 4, May 1975, p. 441-446.
Astronomy and Astrophysics
Astrophysics
46
Infrared Spectra, Protostars, Star Formation, Stellar Spectra, Astronomical Photometry, Cosmic Dust, Energy Spectra, H Ii Regions, Point Sources, Stellar Envelopes
Scientific paper
This paper reports discovery and observations, in the wavelength range from 1.25 to 3.4 microns, of a bright infrared source in Sharpless 2-106. Results are interpreted by a model of stellar core surrounded by an emitting dust shell at about 2000 K and a cooler external dust layer responsible for the strong local absorption. This object is found near the center of a dense H II knot surrounded by a compact H II region. From the large surface brightness found at 3.4 microns, which is much larger than that for free-free emission, a bright extended source is expected at longer wavelengths. A nonspherical distribution of the absorbing material is suggested to explain the morphology of the nebula. This may be due to possible rotational effects on the cloud and the contracting protostar.
Bergeat J.
Kandel Robert
Lunel M.
Sibille Francois
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