Results 271 to 280 of about 114,760 (309)

Dynamics of Interacting Galaxies

Annual Review of Astronomy and Astrophysics, 1992
The 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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Gravitational interactions between galaxies

Physics Reports, 1982
Abstract The dynamics of an encounter between two galaxies is discussed. Generally in galactic encounter, on account of the tidal forces, the binding energies of the galaxies increase and hence their relative orbital energy decreases. The former has disruptive effects on galaxies and the latter may lead to the merging of galaxies under certain ...
Saleh Mohammed Alladin, K.S.V.S. Narasimhan   +1 more
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Interactions between Galaxies

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 ...
Françoise Combes, Patrick Boissé, Alain Mazure, Alain Blanchard   +3 more
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Galaxy Interactions and the Radio Galaxy Phenomenon

1990
We 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
E. P. Smith, T. M. Heckman
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Bar Formation by Galaxy-Galaxy Interactions

2004
Bar 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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Structure of interacting elliptical radio galaxies

Astrophysics and Space Science, 1993
We have used a numerical method based on elliptical fitting of isophotes to analyse the structural parameters of three pairs of elliptical galaxies containing radio jets. The relationship between tidal interactions and radio activity is also investigated.
Lourdes De Juan, Luis Colina, Ismael Pérez-Fournon   +2 more
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Interacting galaxies and mergers

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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Galaxy‐galaxy interactions as triggers of star formation

Astronomische Nachrichten, 2009
AbstractGalaxy‐galaxy interactions represent the main physical processes that trigger substantial star formation in galaxies. In order to study the galaxy interactions effects on color and morphology of the galaxies in the fields of two radio galaxies at z ∼ 1, we combined optical‐NIR photometry and HST/WFPC2 morphology data from the Stanford et al ...
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Onconephrology: The intersections between the kidney and cancer

Ca-A Cancer Journal for Clinicians, 2021
, Kenar D Jhaveri, Mark A Perazella
exaly  

Dynamic and reconfigurable materials from reversible network interactions

Nature Reviews Materials, 2022
Matthew J Webber, Mark W Tibbitt
exaly