Spontaneous Scalarization of Black Holes and Compact Stars from a Gauss-Bonnet Coupling

Hector O. Silva, Jeremy Sakstein, Leonardo Gualtieri, Thomas P. Sotiriou, and Emanuele Berti
Phys. Rev. Lett. 120, 131104 – Published 30 March 2018

Abstract

We identify a class of scalar-tensor theories with coupling between the scalar and the Gauss-Bonnet invariant that exhibit spontaneous scalarization for both black holes and compact stars. In particular, these theories formally admit all of the stationary solutions of general relativity, but these are not dynamically preferred if certain conditions are satisfied. Remarkably, black holes exhibit scalarization if their mass lies within one of many narrow bands. We find evidence that scalarization can occur in neutron stars as well.

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  • Received 7 November 2017
  • Revised 27 December 2017

DOI:https://doi.org/10.1103/PhysRevLett.120.131104

© 2018 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Hector O. Silva1,2,*, Jeremy Sakstein3,†, Leonardo Gualtieri4,‡, Thomas P. Sotiriou5,6,§, and Emanuele Berti1,∥

  • 1Department of Physics and Astronomy, The University of Mississippi, University, Mississippi 38677, USA
  • 2eXtreme Gravity Institute, Department of Physics, Montana State University, Bozeman, Montana 59717, USA
  • 3Center for Particle Cosmology, Department of Physics and Astronomy, University of Pennsylvania, 209 S. 33rd Street, Philadelphia, Pennsylvania 19104, USA
  • 4Dipartimento di Fisica “Sapienza” Università di Roma and Sezione INFN Roma1, Piazzale Aldo Moro 5, 00185 Rome, Italy
  • 5School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
  • 6School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom

  • *hector.okadadasilva@montana.edu
  • sakstein@physics.upenn.edu
  • leonardo.gualtieri@roma1.infn.it
  • §thomas.sotiriou@nottingham.ac.uk
  • eberti@olemiss.edu

See Also

Evasion of No-Hair Theorems and Novel Black-Hole Solutions in Gauss-Bonnet Theories

G. Antoniou, A. Bakopoulos, and P. Kanti
Phys. Rev. Lett. 120, 131102 (2018)

New Gauss-Bonnet Black Holes with Curvature-Induced Scalarization in Extended Scalar-Tensor Theories

Daniela D. Doneva and Stoytcho S. Yazadjiev
Phys. Rev. Lett. 120, 131103 (2018)

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Vol. 120, Iss. 13 — 30 March 2018

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