Simulation of gas flowing onto a binary black hole (two black circles) taken from Manikantan and Paschalidis 2025. The brighter colors indicate a denser gas.

Research

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I am a high-energy theoretical and computational astrophysicist. My research focuses on understanding multimessenger emission from the accretion flows and outflows of compact objects such as supermassive (binary) black holes. I use numerical relativity and magnetohydrodynamic codes, such as the Einstein Toolkit, IllinoisGRMHD, and H-AMR, to simulate these systems from first principles.

Currently, I work with Professor Vasileios Paschalidis to study accretion onto supermassive binary black holes with the goal of identifying their unique electromagnetic signals. We study these systems by solving Einstein's equations of general relativity to accurately model the spacetime, and then evolving the magnetohydrodynamic equations on the curved spacetime to simulate the accretion flow.

I am a member of the Theoretical Astrophysics Program (TAP) and the Transient Astrophysics group (SONATA) at the University of Arizona. Additionally, I am a core member of the Laser Interferometer Space Antenna (LISA) Consortium within the Astrophysics Working Group.

Selected Publications

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  1. Magnetically arrested minidisks around nonspinning binary black holes: The MAD scenario for circumbinary disk accretion

    Vikram Manikantan and Vasileios Paschalidis  ·  2025  ·  Phys. Rev. D 112, 103050

  2. Effects of eccentricity on accreting binary black holes: MHD simulations in full GR reveal novel periodicities in jet power and synchrotron spectra

    Vikram Manikantan, Vasileios Paschalidis, and Gabriele Bozzola  ·  2025  ·  Phys. Rev. D 112, 043004

  3. Coincident Multimessenger Bursts from Eccentric Supermassive Binary Black Holes

    Vikram Manikantan, Vasileios Paschalidis, and Gabriele Bozzola  ·  2025  ·  ApJL 984 L47

  4. Winds and Disk Turbulence Exert Equal Torques on Magnetically Arrested Disks

    Vikram Manikantan, Nick Kaaz, Jonatan Jacquemin-Ide, et al.  ·  2024  ·  ApJ 965 175

Selected Talks

  1. Binary Black Holes Gone MAD: Magnetically Arrested Minidisks Around Nonspinning Black Holes

    American Physical Society Global Summit  ·  March 2026  ·  Upcoming contributed talk

  2. Coincident Multimessenger Bursts from Eccentric Supermassive Binary Black Holes

    33rd Texas Symposium on Relativistic Astrophysics  ·  December 2025  ·  Contributed talk

  3. Binary Black Holes Gone MAD

    Event Horizon Telescope Theory Working Group Meeting  ·  November 2025  ·  Virtual

  4. Eccentric Binary Black Holes: MHD Simulations in Full GR Reveal Novel Periodicities in Jet Power and Synchrotron Spectra

    American Physical Society Global Summit  ·  April 2025  ·  Contributed talk