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Nonlinear black hole spectroscopy

ORAL

Abstract

According to general relativity, the remnant of a binary black hole merger must be a perturbed Kerr black hole. Perturbed Kerr black holes emit "ringdown" radiation which is well described by a superposition of quasinormal modes, with frequencies and damping times that depend only on the mass and spin of the remnant, but nonlinear corrections have proven to be important. I will give an overview of recent progress by our group on this "nonlinear black hole spectroscopy" program, and present some highlights of work that will be discussed in more detail by Johns Hopkins students. I will focus on three important open issues: (1) Can we identify nonlinear effects in numerical relativity simulations? (2) What are the prospects of observing these nonlinear effects? (3) Can ringdown be used to constrain modified gravity theories?

* This work is supported by NSF Grants No. AST-2006538, PHY-2207502, PHY-090003 and PHY-20043, by NASA Grants No. 20-LPS20-0011 and 21-ATP21-0010, by the John Templeton Foundation Grant 62840, by the Simons Foundation, and by the Italian Ministry of Foreign Affairs and International Cooperation grant No.~PGR01167. This work was carried out at the Advanced Research Computing at Hopkins (ARCH) core facility (\url{rockfish.jhu.edu}), which is supported by the NSF Grant No.~OAC-1920103.

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Publication: arXiv:2302.03050, arXiv:2310.04489, arXiv:2311.14803, plus work in preparation

Presenters

  • Emanuele Berti

    Johns Hopkins University

Authors

  • Emanuele Berti

    Johns Hopkins University

  • Mark Ho-Yeuk H Cheung

    Johns Hopkins University

  • Sophia Yi

    Johns Hopkins University

  • Luca Reali

    Johns Hopkins University

  • Vishal Baibhav

    CIERA, Northwestern University