Bibcode
Beckman, J. E.; Cepa, J.; Varela, A. M.
Bibliographical reference
International Conference on Dynamics and Interactions of Galaxies, p. 413 - 415
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1990
Citations
0
Refereed citations
0
Description
Using the measured common distance from the observer, angular separation
of a dwarf satellite from its mother galaxy and their relative radial
velocities, plus three criticable assumptions: circularity of the orbit,
spherical symmetry of the gravitational potential, and that the radius
of the dwarf galaxy is limited by tidal interaction with the mother, the
authors show how to derive the orbital elements of the satellite. A
trial of the method with the satellites of M31, M32 and NGC 205, gave
results consistent with all three assumptions. Here the authors apply it
to two systems, NGC 128 and NGC 1023, and their satellites, concluding
that it is a useful exploratory tool, but that at its best it requires
better data than the literature offers.