Collapses and explosions in self-gravitating systems
نویسندگان
چکیده
منابع مشابه
Thermodynamics and Self-Gravitating Systems
This work assembles some basic theoretical elements on thermal equilibrium, stability conditions, and fluctuation theory in self-gravitating systems illustrated with a few examples. Thermodynamics deals with states that have settled down after sufficient time has gone by. Time dependent phenomena are beyond the scope of this paper. While thermodynamics is firmly rooted in statistical physics, e...
متن کاملThermodynamics of self-gravitating systems.
We study the thermodynamics and the collapse of a self-gravitating gas of Brownian particles. We consider a high-friction limit in order to simplify the problem. This results in the Smoluchowski-Poisson system. Below a critical energy or below a critical temperature, there is no equilibrium state and the system develops a self-similar collapse leading to a finite time singularity. In the microc...
متن کاملSelf-Gravitating Systems in Extended Gravity
Starting from the weak field limit, we discuss astrophysical applications of Extended Theories of Gravity where higher order curvature invariants and scalar fields are considered by generalizing the Hilbert-Einstein action linear in the Ricci curvature scalar R. Results are compared to General Relativity in the hypothesis that Dark Matter contributions to the dynamics can be neglected thanks to...
متن کاملPhase transitions in self-gravitating systems
We discuss the nature of phase transitions in self-gravitating systems. We show the connexion between the binary star model of Padmanabhan, the thermodynamics of classical point mass stars and the thermodynamics of the self-gravitating Fermi gas at non-zero temperature. We also briefly discuss the influence of rotation on the thermodynamical stability of self-gravitating systems.
متن کاملGeometric Entropy of Self-Gravitating Systems
We shall review different approaches to the entropy of self-gravitating systems in General Relativity. Then we shall discuss in detail the macroscopic approach based on à la Clausius point of view. Recent developments will be reviewed discussing the aims as well as the assumptions which the framework is based on.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review E
سال: 2003
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.68.036117