Radio emission from zeta Puppis and gamma-2 Velorum at two centimetres

Astronomy and Astrophysics – Astronomy

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Centimeter Waves, Radiant Flux Density, Radio Emission, Stellar Radiation, Far Ultraviolet Radiation, Hot Stars, Microwave Emission, Stellar Evolution, Stellar Mass Ejection, Stellar Winds, Ultraviolet Spectra

Scientific paper

The probable detection of radio flux from zeta Puppis and the definite detection of radio flux from gamma-2 Velorum at 14.7 GHz are reported. The radio flux values are 6.7 + or - 1.5 and 67 + or - 5 mJy respectively. If these fluxes are interpreted as free-free emission from shells of ionized gas resulting from stellar winds, mass ejection rates of 6.3 + or - 1.5 times 10 to the minus sixth power solar masses/yr for zeta Puppis and 3.9 + or - 0.7 times 10 to tne minus fifth power solar masses/yr for gamma-2 Velorum are obtained.

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