[en] This paper deals with the gravitational stability of an isothermal nebula stratified in plane parallel layers symmetrical with respect to a central plane of density p0. It is shown that JEANS' criterion is still valid provided that one takes for the density which appears in it, the value p0 /2. This justifies the use made by G.P. KUIPER of JEANS' criterion in his discussions of the origin of the solar system. More generally, a preliminary condensation of nebulous mutter according to this model might help in the formation by gravitational instability of smaller condensations then hitherto possible.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Ledoux, Paul ; Cointe-Sclessin - Belgique > Institut d'Astrophysique
Language :
English
Title :
Sur la stabilité gravitationnelle d'une nébuleuse isotherme
Publication date :
01 January 1951
Journal title :
Annales d'Astrophysique
ISSN :
0365-0499
Publisher :
Caisse nationale de la recherche scientifique, Paris, France
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