Rotation and masses of three isolated galaxies

Details Rotation and masses of three isolated galaxies Rotation and masses of three isolated galaxies

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26as...86....1k&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 86, no. 1, Nov. 1990, p. 1-6. Research supported by CNRS.

Astronomy and Astrophysics

Astrophysics

6

Astronomical Spectroscopy, Galactic Mass, Galactic Rotation, Rotating Matter, Galactic Clusters, Gravitational Fields, H Alpha Line, Intergalactic Media, Spiral Galaxies, Star Formation

Scientific paper

Rotation curves and spin orientations are presented for the three nearby isolated subdwarf galaxies NGC 1156, NGC 5949, and NGC 6503, and the galactic masses are calculated. NGC 1156 does not show signs of rotation, while the other two have well-defined rotation curves. The optical rotation curves are not falling, and show evidence of dark halos. All three galaxies have moderate mass-to-luminosity ratios inside their optical diameters. The arms of NGC 5949 and NGC 6503 are trailing. All the galaxies appear to be resolved into bright stars. Distance estimates in good agreement with the ones in the Tully Catalog are obtained.

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