[ Publications | Teaching | Science outreach and other contributions ]

My research primarily focuses on hairy black holes in various theoretical frameworks, including General Relativity coupled to non-Abelian fields and Modified Gravity.
My work involves the numerical construction and theoretical analysis of static (or stationary) classical solutions, for which I develop custom numerical codes. I have also studied other types of field configurations such as boson stars, magnetic monopoles, and Q-balls.

Affiliated Researcher at Institut Denis Poisson, UMR CNRS 7013
Formerly affiliated with the Department of Physics at the University of Tours
Research group: Theoretical Physics (Gravitation)

Contact
Office: Building E2, 1360
Phone: +33 2 47 36 69 46
Emails: (institutional), (professional and permanent)

Mailing address
Institut Denis Poisson, UMR CNRS 7013,
Université de Tours,
Parc de Grandmont,
37200 Tours, France

Publications

• Black holes with electroweak hair — the detailed derivation
  R. Gervalle and M. S. Volkov
  To be submitted to Physical Review D — arXiv:2504.09304
• Black holes with electroweak hair
  R. Gervalle and M. S. Volkov
  Physical Review Letters 133, 171402 (2024) — arXiv:2406.14357
• Electroweak multi-monopoles
  R. Gervalle and M. S. Volkov
  Nuclear Physics B987, 116112 (2023) — arXiv:2211.04875
• Chains of rotating boson stars
  R. Gervalle
  Physical Review D 105, 124052 (2022) — arXiv:2206.03982
• Electroweak monopoles and their stability
  R. Gervalle and M. S. Volkov
  Nuclear Physics B984, 115937 (2022) — arXiv:2203.16590
• Asymptotically flat hairy black holes in massive bigravity
  R. Gervalle and M. S. Volkov
  Physical Review D 102, 124040 (2020) — arXiv:2008.13573

PhD Thesis

Title: Hairy black holes and other compact objects in theories of gravity
Supervisors: M. S. Volkov and L. Villain
Defense date: December 13, 2023 at University of Tours
Manuscript available on: arXiv:2410.13552 and HAL theses

Teaching

Tutorial session (TD)

• Electrostatics and Elementary Circuit Theory — 1st-year undergrad.
• Electromagnetism — 2nd-year undergrad.
• Thermodynamics — 2nd-year undergrad.
• Introduction to Nuclear Physics — 2nd-year undergrad.

Lab session (TP)

• Classical Mechanics — 1st-year undergrad.
• Experimental Physics — 2nd-year undergrad.

Other contributions to the scientific community

• Participation in a general public science program on the radio France Culture (2025)
  Discussion on hairy black holes in the show La science, CQFD : « Trous noirs chevelus : une théorie qui décoiffe. »
• Science outreach article in The Conversation (2024)
  « Découverte théorique d’un nouveau type de trous noirs. Ils sont « chevelus » et entourés d’anneaux de particules élémentaires. »
• PhD student representative of the MIPTIS Doctoral School (2020-2023)
  Organization of the PhD student’s days, help in managing conflicts between PhD students and supervisors.