2 papers
gr-qc2024
Closed strings in a class of pp-wave spacetimes and the memory effect
Ayan Dey, Sayan Kar
We study closed string evolution in the pp-wave spacetime assuming different pulse shapes (square and sech-squared) in the exact gravitational wave metric. It is shown that the sha…
gr-qc2024
Novel regular black holes: geometry, source and shadow
Anjan Kar, Sayan Kar
We propose a two-parameter, static and spherically symmetric regular geometry, which, for specific parameter values represents a regular black hole. The matter required to support…