The infrared-excess of peculiar B and A stars. I

Astronomy and Astrophysics – Astrophysics

Scientific paper

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A Stars, B Stars, Infrared Radiation, Magnetic Stars, Stellar Radiation, Stellar Spectrophotometry, Early Stars, Stellar Envelopes, Stellar Magnetic Fields, Stellar Winds

Scientific paper

Infrared excess at 4.8 microns has been found for 60% of 82 Bp and Ap stars measured photoelectrically at 1.25-4.8 microns. The maximum excess is shown to decrease with increasing spectral type from BO to FO. The correlation with the magnetic field adopted for helium-variable early B stars does not hold for the whole sample of stars studied: there are several stars which show excess and no magnetic field and there are stars with a strong magnetic field and no or only small excess.

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