Radio emission from Puppis and 2 Velorum at two centimetres

Radio fluxes of 6.7 ± 1.5 and 67 ± 5 mJy at 14.7 GHz have been detected from the stars ζ Pup and γ² Vel respectively with the 65-m telescope at Parkes. This is the first detection of ζ Pup, while that of γ² Vel is consistent with previous measurements at lower frequencies. The interpretation of these fluxes as free—free emission from shells of ionized gas resulting from stellar winds gives mass-loss rates $$\dot M=(6.3\pm1.5)\times10^{-6}M_\odot/\text{yr}$$ for ζ Pup and $$(3.9\pm0.7)\times10^{-5}M_\odot/\text{yr}$$ for γ² Vel. The result for ζ Pup agrees well with $$(7\pm3)\times10^{-6}M_\odot/\text{yr}$$ derived from the profiles of the far-ultraviolet P-Cygni lines.