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Dynamics of Interacting Galaxies
Annual Review of Astronomy and Astrophysics, 1992The dynamics of interacting galaxies as observed in the present epoch is reviewed. Topics discussed include numerical methods for modeling galactic interactions, the signatures of interacting galaxies due to tidal forces, and events that add mass to a galaxy.
Joshua E. Barnes, Lars Hernquist
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Galaxy Interactions and the Radio Galaxy Phenomenon
1990We have been studying powerful radio galaxies (which we define as having radio power at 178MHz, P 178 ≥ 5xl024 Watts/Hz for a cosmology of H o = 100 km sec-1 Mpc-1 and q o = 0) in order to determine their origins. There are two distinct classes of powerful radio galaxies (PRGs), the so called class A and B radio galaxies (Hine and Longair 1979; Heckman
T. M. Heckman, E. P. Smith
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Interacting galaxies and mergers [PDF]
Astrophysics and Space Science, 1993 A study of the merger time-scales of various types of interacting galaxies is conducted on the basis of the collisional theory. The results indicate that in the absence of halos, violently interacting galaxies merge in a time-scale of ~ 108 years; but the mildly interacting ones have merger time-scales from ~ 109 to 1010 years. However, in the presence
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1995
Gravitational interactions between galaxies are far more common than one might think, assuming that the space density of galaxies is uniform. The galaxies in effect group themselves in clusters, small groups, or pairs: far from being isolated systems they are formed and evolve in interaction with their environment and in particular with neighbouring ...
Patrick Boissé +3 more
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Gravitational interactions between galaxies are far more common than one might think, assuming that the space density of galaxies is uniform. The galaxies in effect group themselves in clusters, small groups, or pairs: far from being isolated systems they are formed and evolve in interaction with their environment and in particular with neighbouring ...
Patrick Boissé +3 more
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Bar Formation by Galaxy-Galaxy Interactions
2004Bar formation process in interacting galaxies is reviewed on the basis of recent numerical simulations. I focus especially on the possible kinematical difference between tidally-induced bars and spontaneous bars: the former spans a wider range in the rotation rate, depending upon the parameters of the interaction as well as the internal structure of ...
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The Effects of Galaxy — Galaxy Interactions on Nuclear Activity [PDF]
, 1986 The notion that galaxy — galaxy interactions do affect the properties of galaxy nuclei is not new. The earliest indications come from surveys of the radio continuum emission from spiral galaxies. Sulentic (1976) and Stocke (1978) demonstrated that galaxies in close pairs show an excess of radio emission.
William C. Keel +3 more
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The Hydrodynamical Interaction of Galaxies
1991We present 3D hydrodynamical calculations on interacting/merging galaxies. We find that nearly head-on collisions of galaxies lead to new galaxy formation.
Masayuki Umemura, S. Yoshioka
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Galaxy Interactions and Transformations
2010So far we have treated galaxies as isolated, non-interacting systems. However, in the hierarchical scenario of structure formation, galaxies and their associated dark matter halos undergo frequent interactions with each other. As we have seen in §7.3.6, a large fraction of dark matter halos are expected to be dynamically young (i.e. to have experienced
Houjun Mo +2 more
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On the nature of interacting galaxies
Astrophysics, 1970S ta t i s t i ca l data . I n t e r ac t i ng galaxies inc lude ga l axies with d i s to r t ed shape, ga laxies i m m e r s e d in a common luminous cloud, coa lesc ing galaxies , ga laxies joined by a bar and showing " ta i l s , " c lose groups ("nes t s" ) , and chains of ga lax ies .
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Gravitational Interactions between Galaxies
Symposium - International Astronomical Union, 1974Recent theoretical studies of the consequences of fierce tidal interactions between galaxies are reviewed and compared.
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