Velocity dispersion of planetary nebulae in the nuclear bulge of M31

Details Velocity dispersion of planetary nebulae in the nuclear bulge of M31 Velocity dispersion of planetary nebulae in the nuclear bulge of M31

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273..562l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 273, Oct. 15, 1983, p. 562-575.

Astronomy and Astrophysics

Astrophysics

13

Andromeda Galaxy, Astronomical Spectroscopy, Galactic Bulge, Galactic Structure, Planetary Nebulae, Radial Velocity, Stellar Motions, Velocity Distribution, Astronomical Photography, Bandpass Filters, Galactic Evolution, Galactic Nuclei

Scientific paper

The author used a sequence of velocity-modulated photographs to find and measure the radial velocities of faint planetary nebulae near the center of M31. The photographs were made with a velocity modulating camera applying a temperature-tuned 2.1 Å (FWHM) [O III] λ5007 interference filter. The author identified 19 new planetary nebulae, bringing the total number of known planetaries within 1arcmin of M31's nucleus to 45. He derived radial velocities and relative brightnesses for 33 of the nebulae. A mean heliocentric velocity of -309(±25) km s-1 and a velocity dispersion of 156(±23) km s-1 is determined for the planetary nebulae.

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