Nearby galaxy flows modeled by the light distribution - Distances, model, and the local velocity anomaly

Details Nearby galaxy flows modeled by the light distribution - Distances, model, and the local velocity anomaly Nearby galaxy flows modeled by the light distribution - Distances, model, and the local velocity anomaly

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...80..479t&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 80, no. 2, June 1992, p. 479-499. Research supported by NSF.

Astronomy and Astrophysics

Astrophysics

67

Galactic Clusters, Light Transmission, Peculiar Galaxies, Radial Velocity, Velocity Distribution, Astronomical Models, Distance, Red Shift, Relic Radiation, Tables (Data)

Scientific paper

Tables giving measured galaxy distances used to construct a map of observed peculiar velocities, and giving a grid of the distribution of light used to construct a map of expected peculiar velocities are presented. A preferred model was developed which yielded a best fit between these maps, and this model was used to generate output kinematic distances which are recorded for groups and individual galaxies with V0 of less than 3000 km/s. In terms of the ratio of peculiar-to-systemic velocities, the local velocity anomaly is the most important perturbation involving substantial numbers of galaxies for this case. The ratio of these quantities in this case is larger than for the more famous cases of the Virgocentric or Great Attractor perturbations. Maps which illustrate the fit of the present mass model to the velocity data in the local region are provided. A graphical demonstration of the relative importance of large-scale streaming to local motions within the context of this model is presented.

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