scholarly journals Galaxy Formation by Cosmic Strings and Cooling of Baryonic Matter

1987 ◽  
Vol 78 (6) ◽  
pp. 1219-1224 ◽  
Author(s):  
Mizuo Izawa ◽  
Humitaka Sato
Keyword(s):  
Galaxy Formation ◽  
Cosmic Strings ◽  
Baryonic Matter

scholarly journals Galaxy Formation with Hot Dark Matter and Cosmic Strings

1988 ◽  
Vol 130 ◽  
pp. 560-561
Author(s):  
Robert H. Brandenberger
Keyword(s):  
Dark Matter ◽  
Galaxy Formation ◽  
Cosmic Strings ◽  
Severe Problem ◽  
Small Scales ◽  
The Galaxy

Hot dark matter particles have large thermal velocities at teg and hence cannot be gravitationally bound on small scales (free streaming). In models of formation of structure based on linear adiabatic perturbations all inhomogeneities on scales smaller than the maximal free streaming length λj are washed out. The mass λj inside a bail of radius exceeds the galaxy mass. Hence in the above models galaxies can only lorm by fragmentation of larger-scale objects. This is a severe problem.

scholarly journals Galaxy Formation by Cosmic Strings

1986 ◽  
Vol 75 (6) ◽  
pp. 1342-1350 ◽  
Author(s):  
H. Sato
Keyword(s):  
Galaxy Formation ◽  
Cosmic Strings

scholarly journals Observational Data Related to the Largest Galaxies of the Universe: What they Tell?

2020 ◽  
pp. 236-240
Author(s):  
H. A. Harutyunian
Keyword(s):  
Dark Energy ◽  
Observational Data ◽  
Galaxy Formation ◽  
Physical Mechanism ◽  
Baryonic Matter ◽  
Model Predictions ◽  
The Galaxy ◽  
Cd Galaxies ◽  
Mechanism Of Interaction ◽  
The Universe

The physical mechanism of interaction between dark energy and ordinary baryonic matter is used to show that Ambartsumian's cosmogonic paradigm on the galaxy formation gets new support. This mechanism is considered to compare the cD galaxies observational properties with the model predictions in the framework of the suggested paradigm.

Galaxy formation with cosmic strings and massive neutrinos

1988 ◽  
Vol 328 ◽  
pp. 23 ◽  
Author(s):  
Edmund Bertschinger ◽  
Paul N. Watts
Keyword(s):  
Galaxy Formation ◽  
Cosmic Strings ◽  
Massive Neutrinos

Cosmic Strings and Galaxy Formation

1989 ◽  
Vol 571 (1 Texas Symposi) ◽  
pp. 151-169 ◽  
Author(s):  
EDMUND BERTSCHINGER
Keyword(s):  
Galaxy Formation ◽  
Cosmic Strings

Cosmic strings and galaxy formation

1986 ◽  
Vol 320 (1556) ◽  
pp. 565-571 ◽  
Keyword(s):  
Early Universe ◽  
Galaxy Formation ◽  
Cosmic Strings ◽  
Alternative Scenario

The role of strings in the early Universe is reviewed, with particular emphasis on the possibility that they may provide the fluctuations that lead to galaxy formation. Evidence from the correlation of clusters is presented. An alternative scenario, in which much lighter strings might come to dominate the recent Universe is also discussed briefly.

COSMIC STRINGS, HOT DARK MATTER AND THE LARGE-SCALE STRUCTURE OF THE UNIVERSE

1990 ◽  
Vol 05 (09) ◽  
pp. 1633-1651 ◽  
Author(s):  
ROBERT H. BRANDENBERGER ◽  
LEANDROS PERIVOLAROPOULOS ◽  
ALBERT STEBBINS
Keyword(s):  
Dark Matter ◽  
Galaxy Formation ◽  
Large Scale ◽  
Cosmic Strings ◽  
Unit Length ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Rotation Curves ◽  
The Universe

A review of recent results on large-scale structure and galaxy formation in a model with hot dark matter and cosmic strings is given. With cosmic strings seeding perturbations, many of the arguments against hot dark matter disappear. It is shown that spherical accretion about loops leads to dark matter haloes with flat velocity rotation curves. Velocity perturbations due to wakes behind long, moving strings lead to a network of planar overdensities with a distinguished scale of slightly less than 40×40 Mpc2. If the mass per unit length μ exceeds a certain bound, then the wakes become nonlinear by the present time. In this case, their thickness can be calculated.

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