Two Double Galaxy Systems
- 1 March 1969
- journal article
- other
- Published by Cambridge University Press (CUP) in Publications of the Astronomical Society of Australia
- Vol. 1 (6) , 288-289
- https://doi.org/10.1017/s1323358000011942
Abstract
It is generally assumed from an inspection of prints of non-magellanic spiral galaxies that all constituents, including the HI, are distributed with a large-scale circular symmetry in the plane of the galaxy. This assumption is supported by the expectation that any primordial asymmetry in the mass distribution would have disintegrated by the present epoch under the shearing effects of differential rotation into an approximately circularly symmetric ring. It is therefore surprising to find that the recent high-resolution studies of M 31, M 101, NGC 300 and our own galaxy all show that the HI centroid is significantly displaced from the nucleus. This is a sign that the HI distribution is markedly asymmetric.Keywords
This publication has 4 references indexed in Scilit:
- Neutral Hydrogen Asymmetry in the Galaxy M101 as Evidence for Tidal EffectsNature, 1969
- 21 cm Observations of NGC 300Australian Journal of Physics, 1967
- A Neutral Hydrogen Survey of the Southern Regions of the Andromeda NebulaMonthly Notices of the Royal Astronomical Society, 1966
- A High-Resolution 21-CM Hydrogen-Line Survey of the Andromeda NebulaThe Astrophysical Journal, 1966