The stellar velocity dispersion of the spiral galaxies NGC 6503 and NGC 6340

Details The stellar velocity dispersion of the spiral galaxies NGC 6503 and NGC 6340 The stellar velocity dispersion of the spiral galaxies NGC 6503 and NGC 6340

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...221..236b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 221, no. 2, Sept. 1989, p. 236-249.

Astronomy and Astrophysics

Astrophysics

45

Astronomical Spectroscopy, Spiral Galaxies, Stellar Motions, Astronomical Photometry, Charge Coupled Devices, Emission Spectra, Galactic Structure, Mass To Light Ratios, Radial Velocity

Scientific paper

Results of long-slit spectroscopic observations of the inclined Sc galaxy NGC 6503 and the face-on Sa galaxy NGC 6340 are presented. It is shown that, in NGC 6503, the stellar velocity dispersion in the radial direction is decreasing exponentially with radius, having a scalelength twice the photometric scalelength and a central dispersion of 55 + or - 10 km/s. For the nearly face-on Sa galaxy NGC 6340, the perpendicular (or z-direction) velocity dispersion of the disk and the dispersion of the bulge were determined.

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