[OIII] rotation curves for intermediate redshift galaxies
I have been involved in long slit observations of intermediate redshift (z~0.2) galaxies using the Double Spectrograph on the Hale 5m telescope. These observations, were taken with the aim of comparing rotation as traced by Halpha with that traced by [OIII]. This is of interest because, while Halpha is the preferred line for low redshift galaxies, at high redshifts this line is inaccessible and [OIII] is used. A check of the consistency of the two measures is therefore desirable to improve the comparison of high and low redshift disk galaxies.