7 citations · 22 across the 15 of their papers we have counts for
17 papers
Quasinormal-mode analysis of a massive scalar field in a Schwarzschild background via the spectral method
Davide Batic, Anna Chrysostomou, Alan S. Cornell +1
We study the massive scalar quasinormal-mode spectral problem on a Schwarzschild background using an extended Chebyshev spectral method. The massive dispersion relation has a two-s…
Gravitationally-decoupled hairy black holes: probing geometric, optical, and quasinormal mode signatures
Paul Allen M. Gonzales, Anna Chrysostomou, Alan S. Cornell +1
Gravitational-decoupling provides a systematic framework for constructing black hole geometries from known (seed) solutions (such as the Schwarzschild), whose exterior properties c…
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…
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.…
A note on Strong Cosmic Censorship and its violation in Reissner-Nordström de Sitter black hole space-times
Anna Chrysostomou, Alan S. Cornell, Aldo Deandrea +1
Penrose's Strong Cosmic Censorship conjecture safeguards determinism in General Relativity. Within the initial value approach to General Relativity, proof of Strong Cosmic Censorsh…
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)…
A semi-analytic treatment of quasinormal excitation factors in the eikonal regime
Chun-Hung Chen, Hing-Tong Cho, Anna Chrysostomou +1
In this paper, we present an enhanced semi-analytic method for calculating quasinormal excitation factors in the eikonal regime, specifically for Schwarzschild black holes. To achi…
A three-year comparative study of dominant misconceptions among first-year physics students at a South African university
Anna Chrysostomou, Alan S. Cornell, Wade Naylor
This article discusses a three-year study (2020 - 2022) of dominant misconceptions (DMs) for a large cohort of first-year physics course students at the University of Johannesburg…
Reissner-Nordström black holes in de Sitter space-time: bounds with quasinormal frequencies
Anna Chrysostomou, Alan S. Cornell, Aldo Deandrea +2
Rich physics can be divined from charged black holes subjected to extremal conditions. When applied in conjunction with principles like Weak Cosmic Censorship, this naturally leads…
Black holes and nilmanifolds: quasinormal modes as the fingerprints of extra dimensions?
Anna Chrysostomou, Alan Cornell, Aldo Deandrea +2
We investigate whether quasinormal modes (QNMs) can be used in the search for signatures of extra dimensions. To address a gap in the Beyond the Standard Model (BSM) literature, we…
Polarising questions in the Force Concept Inventory
Anna Chrysostomou, Emanuela Carleschi, Alan S. Cornell +1
The Force Concept Inventory (FCI) is a well-established physics education assessment tool used to evaluate students' comprehension of elementary mechanics principles. While it can…
Asymptotic quasinormal frequencies of different spin fields in -dimensional spherically-symmetric black holes
Chun-Hung Chen, Hing-Tong Cho, Anna Chrysostomou +1
While Hod's conjecture is demonstrably restrictive, the link he observed between black hole (BH) area quantisation and the large overtone () limit of quasinormal frequencies (QN…
Quasinormal modes for integer and half-integer spins within the large angular momentum limit
Chun-Hung Chen, Hing-Tong Cho, Anna Chrysostomou +1
While independent observations have been made regarding the behaviour of effective quasinormal mode (QNM) potentials within the large angular momentum limit, we demonstrate analyti…
Does transitioning to online classes mid-semester affect conceptual understanding?
Emanuela Carleschi, Anna Chrysostomou, Alan S. Cornell +1
The Force Concept Inventory (FCI) can be used as an assessment tool to measure conceptual gains in a cohort of students. The FCI uses a conceptions/"misconceptions" lens rather tha…