Cosmic Black Holes just do not exist, they are the result of incorrect mathematical assumptions.
Application of Gcentral spin to Our Galaxy's Central ? Black Hole ?
The Star S2, at the galactic heart confirms that a central super-massive black hole exists in the galactic center, according to physicist Rainer Schoedel, who with colleagues published the findings in the journal Nature "Star Orbit Nails Black Hole," published 17th October 2002.
' "We can now confidently say that a black hole does indeed exist at the center of our galaxy," said Schoedel, who works at the Max Planck Institute for Astrophysics in Garching, Germany. The source of the intense radio energy that is emitted from the center of the galaxy has been pinpointed to a span of 17 light-hours.
"No event like this one has ever been reported," said the European Southern Observatory, which manages some international telescopes used in the study. The astronomers found "unambiguously" that the star S2 is moving around Sagittarius A "like the Earth orbits the sun." '
ESGT calculations : actual situation
The period of the star S2 is 15.2 years and its distance from the center is about 17 light-hours or 1.9 X 10^10 km. From this data the calculated orbital velocity of S2 is 171 km sec^-1. Therefore at the center of our galaxy, the orbital energy constant for the central mass is
GSagittarius A = 5.6 X 10^14 km^3 sec^-2.
Assuming a basic Schwarzchild geometry, the radius of Sagittarius A would be about 30 light-seconds or 9 X 10^6 km, yielding the surface gravity of this central mass at 6.9 km/sec^2 and the escape velocity at 11,155 km sec^-1.
From Black Hole Theory: fantastic situation
However a black hole would have an escape velocity equal to the speed of light, which is 300,000 km sec^-1. Calculating back to an escape velocity of 300,000 km sec^-1, Sagittarus A would have to have a small radius, of about 78,000 km or 0.26 light-seconds, which is about 11% of the radius of our Sun.
Web Site Reference
Nature Article http://www.nature.com/nsu/021014/021014-6.html
Images http://antwrp.gsfc.nasa.gov/apod/image/021...tre_eso_big.jpg http://www.space.com/images/blackhole_new_021016_02,0.jpg