Planetary nebulae and halo dynamics in early-type galaxies

Details Planetary nebulae and halo dynamics in early-type galaxies Planetary nebulae and halo dynamics in early-type galaxies

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105.1011h&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 691, p. 1011-1015.

Astronomy and Astrophysics

Astronomy

10

Cosmic Dust, Dark Matter, Galactic Halos, Galactic Mass, Mass To Light Ratios, Planetary Nebulae, Gas Dynamics, H Alpha Line, Mass Distribution, Spiral Galaxies

Scientific paper

Planetary nebulae are important test particles for studying the halo dynamics and mass distributions in early-type galaxies. We review briefly the kinematical properties of the planetary-nebula system in the galaxy NGC 5128, the best studied case to date. By applying the spherical Jeans equation to the observed PN major axis rotation and velocity dispersion, we find that the mass-to-light ratio increases with radius, suggesting the presence of dark matter in the halo. The gas dynamics of the dust lane in the galaxy are consistent with this conclusion.

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