TITLE: The second rise of general relativity in astrophysics. Basic principle

PRESENTED BY: L. Neslusan

ABSTRACT: When a model of a relativistic compact object (RCO), e.g. a neutron star, 
is constructed, it is postulated that the distribution of matter inside the object 
must be qualitatively the same as in the Newtonian physics, i.e. the object has 
to occupy the sphere from its outer physical surface down to its center. Because 
of this postulate, only a tiny fraction of the solutions offered us by the general 
relativity is used to model the RCOs. In the presentation, it is shown that the full 
sphere is not a typical form that the Einstein field equations imply. On contrary, 
it is a sphere having a spherical void (vacuum) in its central region and, therefore, 
also the inner physical surface. The basic principle how the void and inner surface 
occur is explained. There are also outlined some consequences of eventual abolition 
of the postulate: there is no upper mass limit of neutron stars or other RCOs, 
the supermassive RCOs in the centers of galaxies and quasars can emit a radiation 
from their photospheres always situated above the event horizon, the gravitational 
acceleration of particles in a vicinity of RCO is not linearly proportional to its 
energy (or mass when it is calculated with the help of the Einstein's formula that 
energy is the product of mass and quadrate of the speed of light), etc.