Kinematically cold and warm planetary nebulae samples, HII regions and supernovae remnants in the disc of the face-on spiral galaxy NGC 628 (M74) - the Planetary Nebulae Spectrograph with the Hα arm
Aaron J. Romanowsky
IntroductionWe present the results from the observations of the galaxy NGC 628 with the Planetary Nebulae Spectrograph (PN.S) equipped with the Hα arm. With the third PN.S arm, the Hα arm, we measure the Hα fluxes, in addition to fluxes and line-of-sight velocities (LOSV) of monochromatic, spatially unresolved [OIII] 5007Å sources, in the nearly face-on disc of NGC 628.MethodsThe narrow band color ([OIII] 5007Å–Hα) vs m5007 magnitude diagram does separate planetary nebulae (PNe) from single comp