Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...344l..53p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 344, Sept. 15, 1989, p. L53-L56. Research supported by NSF.
Astronomy and Astrophysics
Astronomy
131
Celestial Mechanics, Galactic Clusters, Galactic Evolution, Local Group (Astronomy), Gravitational Effects, Many Body Problem, Red Shift
Scientific paper
To test the assumption that galaxy clustering grew by gravity, a way to predict the motions is needed. The method presented here chooses trial orbits to minimize the action given the observed positions and assuming galaxies at high redshift have negligible peculiar velocities. Results are presented for the orbits of Local Group members, along with the Maffei and Sculptor systems treated as point particles. The solutions are checked by using them to generate initial conditions at high redshift for a conventional N-body integration forward in time; the results retrace the solution quite well. The predicted velocities generally resemble the observations, though there are discrepancies.
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