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  • Constraining extra dimensions using observations of black hole quasi-normal modes 
    Mishra, Akash K.; Ghosh, Abhirup; Chakraborty, Sumanta (Cornell University Library, 2021-06)
    The presence of extra dimensions generically modify the spacetime geometry of a rotating black hole, by adding an additional hair, besides the mass M and the angular momentum J, known as the 'tidal charge' parameter, ?. ...
  • Dynamical love for area quantized black holes 
    Nair, Sreejith; Chakraborty, Sumanta; Sarkar, Sudipta (Cornell University Library, 2022-08)
    We show that the area-quantized black holes have non-zero dynamical tidal Love numbers for frequencies differing from the characteristic frequencies associated with the quantization spectrum. Intriguingly, the details of ...
  • Echoes from braneworld wormholes 
    Biswas, Shauvik; Rahman, Mostafizur; Chakraborty, Sumanta (Cornell University Library, 2022-05)
    We have studied the stability of wormhole geometries, under massless scalar, electromagnetic and axial gravitational perturbations, in the context of higher dimensional spacetimes. Intriguingly, the construction of a ...
  • Physical process first law for dynamical black holes and the membrane paradigm 
    Chakraborty, Sumanta; Ghosh, Avirup; Sarkar, Sudipta (Cornell University Library, 2017-09)
    Physical process version of the first law of black hole mechanics relates the change in entropy of a perturbed Killing horizon, between two asymptotic cross sections, to the matter flow into the horizon. In dynamical ...
  • Physical process first law for dynamical black holes and the membrane paradigm 
    Chakraborty, Sumanta; Ghosh, Avirup; Sarkar, Sudipta (Cornell University Library, 2017-09)
    Physical process version of the first law of black hole mechanics relates the change in entropy of a perturbed Killing horizon, between two asymptotic cross sections, to the matter flow into the horizon. In dynamical ...
  • Strong cosmic censorship in higher curvature gravity 
    Mishra, Akash K.; Chakraborty, Sumanta (Cornell University Library, 2019-11)
    Deterministic nature of general relativity is ensured by the strong cosmic censorship conjecture, which asserts that spacetime cannot be extended beyond Cauchy horizon with square integrable connection. Although this ...
  • Understanding photon sphere and black hole shadow in dynamically evolving spacetimes 
    Mishra, Akash K.; Chakraborty, Sumanta; Sarkar, Sudipta (Cornell University Library, 2019-03)
    We study rheology, microstructure, and response to an applied electric field (E) in suspensions of fumed alumina (Al2O3) nanoparticles in a nematic liquid crystal (NLC) made of N-(4-methoxybenzylidene)-4-butylaniline (MBBA). ...

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