scholarly journals Galaxy collisions make waves fast

Nature ◽  
2016 ◽  
Vol 537 (7620) ◽  
pp. 283-283
Keyword(s):  
Galaxy Collisions

scholarly journals From young massive star clusters to old globulars: long-term survival chances

2006 ◽  
Vol 2 (S237) ◽  
pp. 408-408
Author(s):  
Richard de Grijs
Keyword(s):  
Galaxy Formation ◽  
Massive Star ◽  
Cluster Formation ◽  
Star Clusters ◽  
Term Survival ◽  
Star Forming ◽  
Distant Galaxies ◽  
Wide Range ◽  
Galaxy Collisions

Young, massive star clusters (YMCs) are the most notable and significant end products of violent star-forming episodes triggered by galaxy collisions and close encounters. The question remains, however, whether or not at least a fraction of the compact YMCs seen in abundance in extragalactic starbursts, are potentially the progenitors of (≳10 Gyr) old globular cluster (GC)-type objects. If we could settle this issue convincingly, one way or the other, the implications of such a result would have far-reaching implications for a wide range of astrophysical questions, including our understanding of the process of galaxy formation and assembly, and the process and conditions required for star (cluster) formation. Because of the lack of a statistically significant sample of YMCs in the Local Group, however, we need to resort to either statistical arguments or to the painstaking approach of case-by-case studies of individual objects in more distant galaxies.

scholarly journals Splash bridge models of inclined, gas-rich, direct galaxy collisions

2020 ◽  
Vol 492 (4) ◽  
pp. 4892-4916 ◽  
Author(s):  
Travis R Yeager ◽  
Curtis Struck
Keyword(s):  
Inelastic Collision ◽  
Good Evidence ◽  
Particle Simulation ◽  
Similar Form ◽  
Galactic Disc ◽  
Simulation Code ◽  
Direct Collision ◽  
Galaxy Collisions ◽  
Bridge Models ◽  
Over Time

ABSTRACT Splash bridges are formed from the direct inelastic collision of gas-rich galaxies. Recent multiwavelength observations of the Taffy galaxies, UGC 12914/15, have revealed complicated gas structures in the bridge. We have upgraded the sticky particle simulation code of Yeager & Struck by adding: the ability to adjust the relative inclination of the gas discs, the ability to track cloud–cloud collisions over time, and additional cooling processes. Inclination effects lead to various morphological features, including filamentary streams of gas stripped from the smaller galactic disc. The offset of disc centres at impact determines whether or not these streams flow in a single direction or multiple directions, even transverse to the motion of the two galaxies. We also find that, across many types of direct collision, independent of the inclination or offset, the distributions of weighted Mach numbers and shock velocities in colliding clouds relax to a very similar form. There is good evidence of prolonged turbulence in the gas of each splash bridge for all inclinations and offsets tested, as a result of continuing cloud collisions, which in turn are the result of shearing and differentially accelerated trajectories. The number distribution of high velocity shocks in cloud collisions, produced in our low inclination models, are in agreement with those observed by Appleton et al. in the Taffy Galaxies with ALMA.

scholarly journals HYDRODYNAMICS OF HIGH-REDSHIFT GALAXY COLLISIONS: FROM GAS-RICH DISKS TO DISPERSION-DOMINATED MERGERS AND COMPACT SPHEROIDS

2011 ◽  
Vol 730 (1) ◽  
pp. 4 ◽  
Author(s):  
Frédéric Bournaud ◽  
Damien Chapon ◽  
Romain Teyssier ◽  
Leila C. Powell ◽  
Bruce G. Elmegreen ◽  
...  
Keyword(s):  
High Redshift ◽  
Redshift Galaxy ◽  
Galaxy Collisions

scholarly journals Simulations of Galaxy Mergers

1983 ◽  
Vol 100 ◽  
pp. 337-345
Author(s):  
Simon D. M. White
Keyword(s):  
Strong Interactions ◽  
Galaxy Mergers ◽  
Body Techniques ◽  
Galaxy Collisions

The last few years have seen a considerable amount of effort devoted to the problem of simulating the coalescence of galaxies. After a discussion of the merits and limitations of the N-body techniques that have been used, I summarise the insight this research gives into the mechanisms driving strong interactions in galaxy collisions and into the structure of the remnants such collisions produce.

Galaxy collisions in dense groups

1977 ◽  
Vol 213 ◽  
pp. 323 ◽  
Author(s):  
P. Hickson ◽  
D. O. Richstone ◽  
E. L. Turner
Keyword(s):  
Galaxy Collisions

Spherical galaxy collisions - Head-on encounters

1989 ◽  
Vol 336 ◽  
pp. 669 ◽  
Author(s):  
Julio F. Navarro ◽  
Mirta B. Mosconi
Keyword(s):  
Galaxy Collisions
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