Luminosity-velocity diagrams for Virgo Cluster spirals. I - Inner rotation curves

Details Luminosity-velocity diagrams for Virgo Cluster spirals. I - Inner rotation curves Luminosity-velocity diagrams for Virgo Cluster spirals. I - Inner rotation curves

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...353...90w&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 353, April 10, 1990, p. 90-102. Research supported by NASA and NSERC.

Astronomy and Astrophysics

Astrophysics

6

Galactic Rotation, Luminosity, Spiral Galaxies, Virgo Galactic Cluster, Astronomical Photometry, Brightness Distribution, Charge Coupled Devices, Emission Spectra, Velocity Distribution

Scientific paper

Optical rotation curves are presented for the innermost portions of nine spiral galaxies in the Virgo Cluster. The emission-line (H-alpha and forbidden N II) velocity data are to be used in combination with new CCD photometry to construct luminosity-velocity diagrams, in a continuing investigation of an apparent initial linear branch and its potential as a distance indicator. Compared to recent H I data, the present optical rotation curves generally show systematically steeper inner gradients. This effect is ascribed to the poorer resolution of the H I data and/or to holes in the gas distribution.

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