English

Item

ITEM ACTIONSEXPORT
Extreme mass-ratio inspirals around a spinning horizonless compact object

Maggio, E., van de Meent, M., & Pani, P. (2021). Extreme mass-ratio inspirals around a spinning horizonless compact object. Physical Review D, 104(9): 104026. doi:10.1103/PhysRevD.104.104026.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
2106.07195.pdf (Preprint), 2MB
Name:
2106.07195.pdf
Description:
File downloaded from arXiv at 2021-06-17 09:37
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
-
-
:
PhysRevD.104.104026.pdf (Publisher version), 2MB

-
Name:
PhysRevD.104.104026.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute for Gravitational Physics (Albert Einstein Institute), MPGR; )
MIME-Type / Checksum:
application/pdf
-
-
-

show

Creators

show
hide
Creators:
Maggio, Elisa, Author
van de Meent, Maarten1, Author
Pani, Paolo, Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290

Content

show
hide
Free keywords: General Relativity and Quantum Cosmology, gr-qc, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,High Energy Physics - Phenomenology, hep-ph,High Energy Physics - Theory, hep-th
Abstract: Extreme mass-ratio inspirals (EMRIs) detectable by the Laser Interferometer Space Antenna (LISA) are unique probes of the nature of supermassive compact objects. We compute the gravitational-wave signal emitted by a stellar-mass compact object in a circular equatorial orbit around a Kerr-like horizonless supermassive object defined by an effective radius and a reflectivity coefficient. The Teukolsky equations are solved consistently with suitable (frequency-dependent) boundary conditions, and the modified energy and angular-momentum fluxes are used to evolve the orbital parameters adiabatically. The gravitational fluxes have resonances corresponding to the low-frequency quasinormal modes of the central object, which can contribute significantly to the gravitational-wave phase. Overall, the absence of a classical event horizon in the central object can affect the gravitational-wave signal dramatically, with deviations even larger than those previously estimated by a model-independent analysis of the tidal heating. We estimate that EMRIs could potentially place the most stringent constraint on the reflectivity of supermassive compact objects at the remarkable level of ${\cal O}(10^{-6})\%$ and would allow to constrain various models which are not ruled out by the ergoregion instability. In particular, an EMRI detection could allow to rule out (or provide evidence for) signatures of quantum black-hole horizons with Boltzmann reflectivity. Our results motivate performing rigorous parameter estimations to assess the detectability of these effects.

Details

show
hide
Language(s):
Dates: 2021-06-142021
Publication Status: Published in print
Pages: 10+3 pages, 9 figures
Publishing info: -
Rev. Type: -
Identifiers: arXiv: 2106.07195
DOI: 10.1103/PhysRevD.104.104026
Degree: -

show

show

show

Source 1

show
hide
Title: Physical Review D
Source Genre: Journal
Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 104 (9) Sequence Number: 104026 Start / End Page: - Identifier: -