Stability against phase mixing of collisionless self-gravitating matter
نویسندگان
چکیده
منابع مشابه
Local stability criterion for self-gravitating disks in modified gravity
We study local stability of self-gravitating fluid and stellar disk in the context of modified gravity theories which predict a Yukawa-like term in the gravitational potential of a point mass. We investigate the effect of such a Yukawa-like term on the dynamics of self-gravitating disks. More specifically, we investigate the consequences of the presence of this term for the local stability of t...
متن کاملDark-matter decays and self-gravitating halos
We consider models in which a dark-matter particle decays to a slightly less massive daughter particle and a noninteracting massless particle. The decay gives the daughter particle a small velocity kick. Selfgravitating dark-matter halos that have a virial velocity smaller than this velocity kick may be disrupted by these particle decays, while those with larger virial velocities will be heated...
متن کاملPhase structure of self-gravitating systems
The equilibrium properties of classical self-gravitating systems in the grand canonical ensemble are studied by using the correspondence with an euclidean field theory with infrared and ultraviolet cutoffs. It is shown that the system develops a first order phase transition between a low and a high density regime. In addition, due to the long range of the gravitational potential, the system is ...
متن کاملOn Stationary, Self-similar Distributions of a Collisionless, Self-gravitating, Gas
We study systematically stationary solutions to the coupled Vlasov and Poisson equations which have 'self-similar' or scaling symmetry in phase space. In particular, we find analytically all spherically symmetric distribution functions where the mass density and gravitational potential are strict power laws in r, the distance from the symmetry point. We treat as special cases, systems built fro...
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 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: The Astrophysical Journal
سال: 1994
ISSN: 0004-637X,1538-4357
DOI: 10.1086/173875