Disk Planetary Nebulae and the Galactic Rotation Curve

Details Disk Planetary Nebulae and the Galactic Rotation Curve Disk Planetary Nebulae and the Galactic Rotation Curve

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..22...37l&link_type=abstract

Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.22, no. 2, p. 37-44.

Astronomy and Astrophysics

Astronomy

Scientific paper

The galactic rotation curve is determined on the basis of a large sample of planetary nebulae with known radial velocities. Four distance scales are adopted and the curve is estaablished for galactocentric distances of 4 to 14 kpc, approximately, adopting Ro=8.5 kpc for the galactocentric distance of the LSR. The main conclusions are: (i) there is no indication of a measurable decrease of the rotation curve beyond the solar circle; (ii) there are no important differences among the statistical distance scales, even though individual nebulae can have very different distances; (iii) there are significative differences in the space distribution and kinematical properties of PN located at different heights from the galactic plane, as well as of PN of different Peimbert types.

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