MG14 - Talk detail |
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Participant |
Hamid, Aymen | |||||||
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Institution |
University of Kwazulu Natal - Westville - Durban - Kwazul Natal - South Africa | |||||||
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Session |
ES2 |
Accepted |
Yes |
Order |
9 |
Time |
17:30 | 20' |
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Talk |
Oral abstract |
Title |
Cosmic Censorship Conjecture revisited: Covariantly | |||||
| Coauthors | Rituparno Goswami and Sunil D. Maharaj | |||||||
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Abstract |
In this paper we study the dynamics of the trapped region using a frame independent semi-tetrad covariant formalism for general Locally Rotationally Symmetric (LRS) class II spacetimes. We covariantly prove some important geometrical results for the apparent horizon, and state the necessary and sufficient conditions for a singularity to be locally naked. These conditions bring out, for the first time in a quantitative and transparent manner, the importance of the Weyl curvature in deforming and delaying the trapped region during continual gravitational collapse, making the central singularity locally visible |
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Pdf file |
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Session |
BH5 |
Accepted |
Yes |
Order |
2 |
Time |
14:50 | 20' |
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Talk |
Oral abstract |
Title |
Constructing black hole entropy from gravitational collapse | |||||
| Coauthors | Giovanni Acquaviva, George F. R. Ellis, Rituparno Goswami | |||||||
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Abstract |
Based on a recent proposal for the gravitational entropy of free gravitational fields, we investigate the thermodynamic properties of black hole formation through gravitational collapse in the framework of the semitetrad 1+1+2 covariant formalism. In the simplest case of an Oppenheimer-Snyder-Datt collapse we prove that the change ingravitational entropy outside a collapsing body isrelated to the variation of the surface area of the body itself, even before the formation of horizons.As a result, we are able to relate the Bekenstein-Hawking entropy of the black hole endstate to the variation of the vacuum gravitational entropy outside the collapsing body. |
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Pdf file |
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