2025/11/21 by N. V. Krishnendu, Krishnendu, N. V., Tamara Evstafyeva +34
Physics and Astronomy · #Black Holes and Theoretical Physics #Black hole (networking) #Compact space #Cosmology and Gravitation Theories #Gravitational wave #Moment (physics) #Pulsars and Gravitational Waves Research #Quadrupole #Spins
paper · pdf · doi:10.48550/arxiv.2511.17341
published in arXiv (Cornell University) (Cornell University)
openalex publication_date 2025/11/21 · openalex created_date 2025/11/25 · openalex updated_date 2026/08/05
A number of theoretical proposals have been made for horizonless compact objects with masses and spins similar to those of black holes. While gravitational wave signatures from their mergers can resemble those of black holes, features like the spin-induced quadrupole moment may reveal their distinct nature. Using the tight bounds on the spin-induced quadrupole moment of GW241011, we place gravitational wave constraints on the nature of its primary. We find that large classes of exotic compact objects (including rotating boson stars) cannot explain its nature, however, models of sufficiently large compactness of C \gtrsim 0.24 may still be viable contenders.