Double galaxy investigations. I - Observations

1982 ◽  
Vol 50 ◽  
pp. 319 ◽  
Author(s):  
W. G. Tifft
Keyword(s):  
Double Galaxy

Double galaxy redshifts and dynamical analyses

1984 ◽  
Vol 286 ◽  
pp. 437 ◽  
Author(s):  
N. A. Sharp
Keyword(s):  
Double Galaxy

Neutral hydrogen absorption in the double galaxy UGC 6081

1983 ◽  
Vol 88 ◽  
pp. 1749 ◽  
Author(s):  
B. A. Williams ◽  
R. L. Brown
Keyword(s):  
Hydrogen Absorption ◽  
Neutral Hydrogen ◽  
Double Galaxy

scholarly journals Formation of Double Galaxies by Tidal Capture

1975 ◽  
Vol 69 ◽  
pp. 167-175 ◽  
Author(s):  
S. M. Alladin ◽  
A. Potdar ◽  
K. S. Sastry
Keyword(s):  
Density Distribution ◽  
Internal Energy ◽  
The Other ◽  
Relative Speed ◽  
Tidal Effects ◽  
Tidal Disruption ◽  
Single Collision ◽  
Double Galaxy ◽  
Massive Galaxy

The conditions under which double galaxies may be formed by tidal capture are considered. Estimates for the increase in the internal energy of colliding galaxies due to tidal effects are used to determine the magnitudes Vcap and Vdis of the maximum relative velocities at infinite separation required for tidal capture and tidal disruption respectively. A double galaxy will be formed by tidal capture without tidal disruption of a component if Vcap > Vi and Vcap > Vdis where Vi is the initial relative speed of the two galaxies at infinite separation. If the two galaxies are of the same dimension, formation of double galaxies by tidal capture is possible in a close collision either if the two galaxies do not differ much in mass and density distribution or if the more massive galaxy is less centrally concentrated than the other. If we assume, as statistics suggest, that the mass of a galaxy is proportional to the square of its radius, it follows that the probability of the formation of double galaxies by tidal capture increases with the increase in mass of the galaxies and tidal disruption does not occur in a single collision for any distance of closest approach of the two galaxies.

scholarly journals The Double Galaxy Cluster A2465. III. X-Ray and Weak-lensing Observations

2017 ◽  
Vol 844 (1) ◽  
pp. 67 ◽  
Author(s):  
Gary A. Wegner ◽  
Keiichi Umetsu ◽  
Sandor M. Molnar ◽  
Mario Nonino ◽  
Elinor Medezinski ◽  
...  
Keyword(s):  
Galaxy Cluster ◽  
Weak Lensing ◽  
X Ray ◽  
Double Galaxy
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