Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238p...7w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 1, 1989, p. 7P-13P.
Astronomy and Astrophysics
Astronomy
8
Astronomical Photometry, B Stars, Infrared Astronomy Satellite, Stellar Spectra, Near Infrared Radiation, Plasma Radiation, Stellar Atmospheres, Stellar Temperature
Scientific paper
JHKL photometry is reported for three normal B stars and three Be stars in the direction of the south galactic cap with FIR excesses evident from their IRAS fluxes. For the Be stars this excess is already understood as originating from plasma emission in their extended atmospheres. The FIR emission from the other three objects originates in very extended (2-6 arcmin) dust shells surrounding otherwise normal B stars. These shells are larger and more luminous than the well known Beta Pic-type shells found around A stars. Their temperatures are of the order of 60 K, diameters about 50,000 AU and luminosities in the range of 0.05-1 solar luminosity.
Catchpole Robin M.
Feast Michael W.
Whitelock Patricia A.
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