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  • An imaging and spectroscopi...
    Walsh, J R; Rejkuba, M; Walton, N A

    Astronomy and astrophysics (Berlin), 2/2015, Letnik: 574
    Journal Article

    Planetary nebulae (PNe) are excellent tracers of the common low mass stars through their strong and narrow emission lines. The velocities of large numbers of PNe are excellent tracers of galaxy kinematics. NGC 5128, the nearest large early-type galaxy, offers the possibility to gather a large sample. Imaging and spectroscopic observations of PNe in NGC 5128 were obtained to find and measure their velocities. Combined with literature data, a large sample of high quality kinematic probes is assembled for dynamical studies. NTT imaging was obtained in 15 fields in NGC 5128 across 1degree with EMMI and OIII and off-band filters. The chief results are catalogues of 1118 PN candidates and 1267 spectroscopically confirmed PNe in NGC 5128. The catalogue of PN candidates contains 1060 PNe discovered with NTT EMMI imaging and 58 from literature surveys. The total of 1267 confirmed PNe in NGC 5128 with radial velocity measurements is the largest collection of individual kinematic probes in an early-type galaxy.