Evolution of stellar entropy

Evolution of stellar entropy

An appraisal of the behavior of stellar entropy along stellar evolution is made. It is shown that the entropy per baryon of a star of a fixed baryon number decreases monotonically with increasing compactness of the star. The same entropy per baryon increases only whenever an irreversible collapse of...

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Veröffentlicht in:Astronomische Nachrichten 2015-11, Vol.336 (8-9), p.840-844
Hauptverfasser: de Souza, R.A., de Avellar, M.G.B., Horvath, J.E.
Format: Artikel
Sprache:eng
Schlagworte:
Appraisals
Astrophysics
Baryons
black hole physics
Black holes
Entropy
Evolution
Gravitation
Gravitational collapse
Mathematical analysis
Stars
Stars & galaxies
stars: evolution
stars: neutron
Stellar evolution
white dwarfs
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Beschreibung
Zusammenfassung:An appraisal of the behavior of stellar entropy along stellar evolution is made. It is shown that the entropy per baryon of a star of a fixed baryon number decreases monotonically with increasing compactness of the star. The same entropy per baryon increases only whenever an irreversible collapse of the star happens. The recent proposals for a gravitational entropy related to curvature may justify the huge increase of the entropy in the ultimate collapse to a black hole. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0004-6337
1521-3994
DOI:10.1002/asna.201512234