Planetary Nebulae as Probes of Dark Matter in NGC 3384

Details Planetary Nebulae as Probes of Dark Matter in NGC 3384 Planetary Nebulae as Probes of Dark Matter in NGC 3384

1995-10-19

arxiv.org/abs/astro-ph/9510098v1

Astrophys.J. 443 (1995) L5

Astronomy and Astrophysics

Astrophysics

uuencoded gziped PostScript, 8 pages including figures

Scientific paper

10.1086/187822

We have obtained radial velocities of 68 planetary nebulae surrounding the SB0 galaxy NGC 3384 in the Leo I group, using the CTIO 4 m telescope and the Rutgers Fabry-Perot interferometer. The PN system exhibits a well-ordered rotation field aligned with the photometric axes of the galaxy. The rotation curve is flat from about 2 kpc until at least 7 kpc. Our results imply that at least a third of the dynamical mass of the NGC 3379/3384 system may be accounted for in the two bright galaxies.

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