ISO-SWS OBSERVATIONS OF HERBIG AE BE STARS - HI RECOMBINATION LINES IN MWC1080 AND COD -42-DEGREES 11721/

ISO-SWS grating spectra are obtained towards the two Herbig Ae/Be star s MWC1080 and CoD -42 degrees 11721, showing hydrogen recombination li nes of the Brackett, Pfund and Humphreys series. The observed line dec rements in each spectral series are consistent with emission from ioni zed winds, as expected from these early-type stars. We compare the obs erved line emission with a wind model assuming a constant rate of mass flow from the star, which allows to consistently derive mass loss rat e and distance of both stars. We also show that the observed decrement s can only be explained by assuming a ionization bounded compact regio ns whose sizes are a few tens of the stellar radii.