Tidal interactions and the massive halo hypothesis

Details Tidal interactions and the massive halo hypothesis Tidal interactions and the massive halo hypothesis

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977natur.269..395w&link_type=abstract

Nature, vol. 269, Sept. 29, 1977, p. 395, 396.

Other

38

Astronomical Models, Galactic Clusters, Galaxies, Halos, Dynamic Models, Galactic Radiation, Intergalactic Media, Tides

Scientific paper

Arguments concerning an existence of large amounts of unseen material surrounding galaxies are almost exclusively based on the dynamical analysis of galaxies either individually or in groups. It was concluded by Einasto et al. (1974) and by Ostriker et al. (1974) that galaxies may well be surrounded by large 'isothermal haloes' whose mass varies as the radius within which it is measured. The consequences of tidal interactions for the massive halo hypothesis are considered, taking into account effects which will lead to the merging of the observed galaxies. The discussed arguments demonstrate that while certain dynamical considerations seem to require massive haloes, there are others which can severely constrain them.

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