Emission-line imaging of QSOs with high resolution

We report the first detection of emission-line gas within the host galaxies of high-redshift quasi-stellar objects (QSOs). This was done using narrowb and imaging at the redshifted wavelengths of [O III] and H alpha, using the PUEO adaptive optics camera of the Canada-France-Hawaii Telescope. The QSO s are all radio-quiet or very compact radio sources. In all five observed Q SOs, which have redshifts 0.9 to 2.4, we find extended line emission that l ies within (a few kiloparsecs) of the nucleus. The emission 0 " .5 (redshif ted) equivalent widths range from 35 to 300 Angstrom Where there is radio s tructure, the line emission is aligned with it. We also report on continuum fluxes and possible companions. Two of the QSOs are very red and have high resolved continuum flux.