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Early star formation and galaxy formation triggered by the evolution of large‐scale density perturbations
Author(s) -
Mücket J. P.
Publication year - 1987
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.2113080102
Subject(s) - physics , supercluster (genetic) , galaxy , perturbation (astronomy) , star formation , astrophysics , adiabatic process , mass distribution , galaxy formation and evolution , scale (ratio) , statistical physics , astronomy , quantum mechanics , biochemistry , chemistry , phylogenetics , gene
The evolution of small‐scale density perturbations on the background of increasing large‐scale perturbations of supercluster size will be considered. In the case that the characteristic length scales of both perturbation modes differ significantly, the interaction between both modes has to be taken into account already within lowest order of approximation. It will be shown that in this case an effective amplification for the smaller‐scale perturbations occurs. For these perturbations the characteristic times of evolution decreases in dependence on the considered mass‐scales more or less rapidly. Therefore, the growth of adiabatic density perturbations on mass‐scales up to galaxy masses seems to be triggered by the density evolution of superclusters which the smaller‐mass perturbations are embedded in. A model for the formation of observed condensed matter distribution will be proposed.