Talk detail

Participant	Pradhan, Parthapratim
Institution	Department of Physics, V. S. Mahavidyalaya - Manikpara - Paschim Medinipur - West Bengal - India

Session	BH3	Accepted	Yes	Order	4	Time		10'
Talk	Oral abstract	Title	Lyapunov Exponent and Extremal Black Hole
Co-authors
Abstract	We explicitly derive the principal Lyapunov Exponent \emph{in terms of the radial equation of ISCO}(Innermost Stable Circular Orbit) and reciprocal of the Critical Exponent can also be expressed as in terms of the radial ISCO equation for Reisner Nordstr{\o}m) black-hole space-times. Using Lyapunov Exponent, we show that the stability and instability of equatorial circular geodesics, both massive and massless particles for such types of black-hole space-time.

Session	BH1	Accepted	No	Order		Time
Talk	Poster abstract	Title	No ISCOs in Charged Myers Perry Black Hole Spacetime by measuring Lyapunov Exponent
Co-authors
Abstract	We explicitly show that for more than four dimensions$(N \geq 3)$, there are no Innermost Stable Circular Orbit (ISCO) in charged Myers Perry blackhole spacetime. This result is verified by measuring Lyapunov Exponent. Using it, we show that the instability of equatorial circular geodesics, both massive and massless particles for such types of black-hole space-time.

Session	GT3	Accepted	Yes	Order	4	Time	14:45
Talk	Poster abstract	Title	Stability of Equatorial Circular Geodesics for Kerr-Newman Spacetime via Lyapunov Exponent
Co-authors
Abstract	We explicitly computed the principal Lyapunov Exponent \emph{in terms of the radial equation of ISCO}(Innermost Stable Circular Orbit) and reciprocal of the Critical Exponent can also be expressed as in terms of the radial ISCO equation. Using Lyapunov Exponent, we show that the stability and instability of equatorial circular geodesics, both massive and massless particles for Kerr-Newman black-hole space-time. The other aspect we have studied that among the all possible circular geodesics, which encircle the central black-hole, the ISCO has \emph{greatest} orbital period than the null circular orbit as measured by the asymptotic observers. Therefore, the ISCO provide the \emph{slowest way} to circle the black-hole.

Session	AT1	Accepted	Yes	Order	991	Time
Talk	Poster abstract	Title	No ISCOs in Charged Myers Perry spacettime by measuring Lyapunov Exponent
Co-authors
Abstract	\begin{abstract} We explicitly show that for more than four dimensions$(N \geq 3)$, there are no Innermost Stable Circular Orbit (ISCO) in charged Myers Perry blackhole spacetime. This result is verified by measuring Lyapunov Exponent. Using it, we show that the instability of equatorial circular geodesics, both massive and massless particles for such types of black-hole space-time. \end{abstract}

Session	GT3	Accepted	Yes	Order	10	Time	17:21
Talk	Oral abstract	Title	Extremal Versus Non-Extremal Blackhole
Co-authors
Abstract	\begin{abstract} In this talk, I shall addresses a number of issues regarding the disparity between precisely extremely and nearly extremely geometries. \end{abstract}