caa a22 4500 469041404 CHVBK 20180323132812.0 cr unu---uuuuu 170328e19920101xx s 000 0 eng 10.1007/BF02847901 doi (NATIONALLICENCE)springer-10.1007/BF02847901 Spherical gravitational collapse with photon emission and a generalized Schwarzchild interior solution [Elektronische Daten] [J Krishna Rao, M Annapurna] The general dynamical equations for perfect fluid filled spheres with an outward flux of photons are derived. The vital role played by the energy density of the free gravitational field in accelerating photon production has been emphasized. It is pointed out that even when the material energy density is finite, the energy density of the free gravitational field can take infinitely large values resulting in vanishing surface area of the star. A generalized Schwarzschild interior solution with conformally flat geometry but with photon emission has been obtained. It is pointed out that the interior conformal coordinate system bears a strong resemblance to the exterior Krushkal coordinates. It is shown that for spherical star the invariant velocity of the fluid particles, falling towards the centre, is proportional to its radius suggesting that the outer envelopes collapse at a faster rate than the core part. It is shown that the interior radiating solution can be matched with generalized Schwarzchild exterior solution. the Indian Academy of Sciences, 1992 Gravitational collapse nationallicence photon emission nationallicence energy momentum tensor nationallicence trapped surfaces nationallicence 04·20 nationallicence 95·30 nationallicence 97·90 nationallicence Krishna Rao J. Department of Mathematics, Bhavnagar University, 364 002, Bhavnagar, India aut Annapurna M. Department of Mathematics, Bhavnagar University, 364 002, Bhavnagar, India aut Pramana Springer India 38/1(1992-01-01), 21-29 0304-4289 38:1<21 1992 38 12043 https://doi.org/10.1007/BF02847901 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02847901 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Krishna Rao J. Department of Mathematics, Bhavnagar University, 364 002, Bhavnagar, India aut NATIONALLICENCE 700 1- Annapurna M. Department of Mathematics, Bhavnagar University, 364 002, Bhavnagar, India aut NATIONALLICENCE 773 0- Pramana Springer India 38/1(1992-01-01), 21-29 0304-4289 38:1<21 1992 38 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer