MG15 - Talk detail |
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Participant |
Heydarzade, Yaghoub | |||||||
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Institution |
1. Azarbaijan Shahid Madani University, 2. Research Institute for Astronomy and Astrophysics of Maragha (RIAAM) - Tabriz-Margahe Road - 1.Tabriz, 2. Maragha - East Azarbaijan Province - Iran | |||||||
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Session |
BH2 |
Accepted |
Yes |
Order |
9 |
Time |
18:05 | 20' |
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Talk |
Oral abstract |
Title |
Surrounded Evaporating-Accreting Vaidya Black Holes | |||||
| Coauthors | Heydarzade, Yaghoub; Darabi, Farhad | |||||||
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Abstract |
In this work, following the approach of Kiselev for the static black holes, we seek a realistic solution for the classical description of the evaporating-accreting Vaidya black hole in the generic dynamical back- grounds of dust, radiation, quintessence, cosmological constant and phantom field, and classify them according to their behaviors under imposing the positive energy condition. This condition imposes some severe restrictions on the dynamics of the mentioned background fields, and gives a particular distance at which there is no effective radiation-accretion density contribution. |
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Pdf file |
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Session |
BH7 |
Accepted |
Yes |
Order |
10 |
Time |
18:55 | 20' |
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Talk |
Oral abstract |
Title |
D-Bound Entropy for Braneworld Black Holes | |||||
| Coauthors | Heydarzade, Yaghoub; Darabi, Farhad | |||||||
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Abstract |
The Bousso's D-bound entropy for the various possible black hole solutions on a 4-dimensional brane is checked. It is found that the D-bound entropy here is apparently different from that of obtained for the 4-dimensional black hole solutions. This difference is interpreted as the extra loss of information, associated with the extra dimension, when an extra-dimensional black hole is moved outward the observer's cosmological horizon. |
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Pdf file |
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Session |
AT4 |
Accepted |
Yes |
Order |
99 |
Time |
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Talk |
Poster abstract |
Title |
Vaidya Spacetime in Massive Gravity | |||||
| Coauthors | Rudra, Prabir; Pourhassan, Behnam; Heydarzade, Yaghoub; Faizal, Mir; Darabi, Farhad; Ali, Ahmed Farag | |||||||
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Abstract |
We analyze the process of gravitational collapse using the Vaidya spacetime in massive gravity. We find that the end state of the gravitational collapse in the context of massive gravity can be a black hole or a naked singularity depending on the parameters of the theory. Then, we conclude that this work provides counterexamples of the cosmic censorship hypothesis, which states that every singularity must be covered by an event horizon, in the context of massive gravity. |
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Pdf file |
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