Dynamical Tomography of Gravitationally Bound Systems

Are the nearby groups of galaxies gravitationally bound objects ?

We have compared numerical simulations to observations for the nearby (< 40 Mpc) groups of galaxies (Huchra & Geller 1982 and Ramella et al. 2002). The group identification is carried out using a group-finding algorithm developed by Huchra & Geller (1982). Using cosmological N-body simulation code with the ΛCDM cosmology, we show that the dynamical properties of groups of galaxies identified fr...

Far-ultraviolet Surveys of Globular Clusters: Hunting for the Products of Stellar Collisions and near Misses *

Globular clusters are gravitationally bound stellar systems containing on the order of 10 stars. Due to the high stellar densities in the cores of these cluster, close encounters and even physical collisions between stars are inevitable. These dynamical interactions can produce exotic types of single and binary stars that are extremely rare in the galactic field, but which may be important to t...

On Two-parameter Dynamical Systems and Applications

In this note some useful properties of strongly continuous two-parameter semigroups of operators are studied, an exponential formula for two-parameter semigroups of operators on Banach spaces is obtained and some applied examples of two-parameter dynamical systems are discussed

SOME ERGODIC PROPERTIES OF HYPER MV {ALGEBRA DYNAMICAL SYSTEMS

This paper provides a review on major ergodic features of semi-independent hyper MV {algebra dynamical systems. Theorems are presentedto make contribution to calculate the entropy. Particularly, it is proved that thetotal entropy of those semi-independent hyper MV {algebra dynamical systemsthat have a generator can be calculated with respect to their generator ratherthan considering all the par...

Dynamical Systems on Hilbert C*-Modules