7 papers
Adiabatic Deformations of Black Hole Moduli: II. The Magnetic GHS Family
Karim Benakli, Anna Chrysostomou
We study the leading adiabatic response of magnetic GHS black holes in massless Einstein-Maxwell-dilaton theory to a prescribed exterior modulus varying slowly in advanced time. In…
Adiabatic Deformations of Black Hole Moduli: I. Canonical Slices and Fredholm Solvability
Karim Benakli, Anna Chrysostomou
The leading adiabatic response of a static black hole to a slowly evolving asymptotic modulus separates into a geometric problem and a functional-analytic one: the former identifie…
The Fate of Black Hole-Induced Moduli Excursions in the Presence of Scalar Potentials
Karim Benakli, Anna Chrysostomou
Large charged black holes can create macroscopic, locally weakly curved regions in which moduli take values different from their asymptotic values. We study how robust this mechani…
Gravitational waves from flavoured SU(2) early-universe phase transitions
Anna Chrysostomou, Alan S. Cornell, Luc Darmé +2
Flavourful extensions of the Standard Model aimed at explaining its fermionic mass structure typically rely on symmetries, broken at high-energy scales far beyond the reach of fore…
Dominant misconceptions and alluvial flows between Engineering and Physical Science students
Anna Chrysostomou, Alan S. Cornell, Wade Naylor
In this article we assess the comprehension of physics concepts by Physical Science and Engineering students enrolled in their first semester at the University of Johannesburg (UJ)…
Quasinormal frequencies in Reissner-Nordström de Sitter black holes: constraints from space-time and scalar field parameters
Anna Chrysostomou, Alan S. Cornell, Aldo Deandrea +1
We examine the quasinormal modes exhibited by a massive scalar test field carrying an electric charge, oscillating in the outer region of a Reissner-Nordström de Sitter black hole…