Quote:
Originally Posted by Svemir
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Thank you Svemir for this link. I have seen it before but it is much better now and larger.
I wrote a similar post on BAUT forum 7.August.2006
http://www.bautforum.com/archive/index.php/t-45357.html
My English is not so good and some people don't understand me. In Wikipedia is it writen in a proper English:
"Further, it is also known that realistic collapse of gravitational collapse must heat up the collapsing object and it must radiate out part of the energy gain due to release of gravitational energy during collapse. In the context of GR, this assertion has been made only in 2006[13].
Thus the quanta of "heat" i.e., photons and neutrinos generated within the collapsing object must move in increasingly curved trajectories as the continued collapse would proceed towards the z=∞ Black Hole stage. As a result they would increasingly fail to move out of the compact object due to its increasing self-gravity. In other words, the collapse generated radiation would tend to get trapped by self-gravity. This process of pure self-gravitational trapping during continued collapse has recently been elaborated.[14].
The outward PUSH due to radiation = Inward PULL due to gravity …(1)
In other words, sooner or later, at a sufficiently high z, the catastrophic collapse must be halted by the outward trapped radiation pressure and the object must become a quasi-static Radiation Pressure Supported Star (RPSS).
The existence of ECOs/MECOs is certainly not widely accepted at present.
But this is not necessarily because of any theoretical inconsistency or of any lack of observational evidence for ECOs. On the other hand, it could be so simply because the concept of a static Black Hole looks simpler and exact; and, also, four generations of astrophysicists and physicists have got used to working within the BH paradigm."
czeslaw