Light ring and the appearance of matter accreted by black holes

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Light ring and the appearance of matter accreted by black holes. / Cardoso, Vitor; Duque, Francisco; Foschi, Arianna.

In: Physical Review D, Vol. 103, No. 10, 104044, 19.05.2021.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Cardoso, V, Duque, F & Foschi, A 2021, 'Light ring and the appearance of matter accreted by black holes', Physical Review D, vol. 103, no. 10, 104044. https://doi.org/10.1103/PhysRevD.103.104044

APA

Cardoso, V., Duque, F., & Foschi, A. (2021). Light ring and the appearance of matter accreted by black holes. Physical Review D, 103(10), [104044]. https://doi.org/10.1103/PhysRevD.103.104044

Vancouver

Cardoso V, Duque F, Foschi A. Light ring and the appearance of matter accreted by black holes. Physical Review D. 2021 May 19;103(10). 104044. https://doi.org/10.1103/PhysRevD.103.104044

Author

Cardoso, Vitor ; Duque, Francisco ; Foschi, Arianna. / Light ring and the appearance of matter accreted by black holes. In: Physical Review D. 2021 ; Vol. 103, No. 10.

Bibtex

@article{852860fe57cd4a3ca27b115184af9dbe,
title = "Light ring and the appearance of matter accreted by black holes",
abstract = "The geometry of black hole spacetimes can be probed with exquisite precision in the gravitational-wave window, and possibly also in the optical regime. We study the accretion of bright spots-objects which emit strongly in the optical or in gravitational waves-by nonspinning black holes. As the object approaches the event horizon, the emitted radiation to far-away distances is dominated by photons or gravitons orbiting the light ring, causing the total luminosity to decrease exponentially as L-o similar to e(-t/(3 root 3M)). Late-time radiation is blueshifted, due to its having been emitted during the infall, trapped at the light ring and subsequently reemitted. These universal properties are a clear signature of the existence of light rings in the spacetime, and not particularly sensitive to near horizon details.",
keywords = "OPTICAL APPEARANCE, STAR, PERTURBATIONS, OBJECTS, SHADOW, FIELD",
author = "Vitor Cardoso and Francisco Duque and Arianna Foschi",
year = "2021",
month = may,
day = "19",
doi = "10.1103/PhysRevD.103.104044",
language = "English",
volume = "103",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "10",

}

RIS

TY - JOUR

T1 - Light ring and the appearance of matter accreted by black holes

AU - Cardoso, Vitor

AU - Duque, Francisco

AU - Foschi, Arianna

PY - 2021/5/19

Y1 - 2021/5/19

N2 - The geometry of black hole spacetimes can be probed with exquisite precision in the gravitational-wave window, and possibly also in the optical regime. We study the accretion of bright spots-objects which emit strongly in the optical or in gravitational waves-by nonspinning black holes. As the object approaches the event horizon, the emitted radiation to far-away distances is dominated by photons or gravitons orbiting the light ring, causing the total luminosity to decrease exponentially as L-o similar to e(-t/(3 root 3M)). Late-time radiation is blueshifted, due to its having been emitted during the infall, trapped at the light ring and subsequently reemitted. These universal properties are a clear signature of the existence of light rings in the spacetime, and not particularly sensitive to near horizon details.

AB - The geometry of black hole spacetimes can be probed with exquisite precision in the gravitational-wave window, and possibly also in the optical regime. We study the accretion of bright spots-objects which emit strongly in the optical or in gravitational waves-by nonspinning black holes. As the object approaches the event horizon, the emitted radiation to far-away distances is dominated by photons or gravitons orbiting the light ring, causing the total luminosity to decrease exponentially as L-o similar to e(-t/(3 root 3M)). Late-time radiation is blueshifted, due to its having been emitted during the infall, trapped at the light ring and subsequently reemitted. These universal properties are a clear signature of the existence of light rings in the spacetime, and not particularly sensitive to near horizon details.

KW - OPTICAL APPEARANCE

KW - STAR

KW - PERTURBATIONS

KW - OBJECTS

KW - SHADOW

KW - FIELD

U2 - 10.1103/PhysRevD.103.104044

DO - 10.1103/PhysRevD.103.104044

M3 - Journal article

VL - 103

JO - Physical Review D

JF - Physical Review D

SN - 2470-0010

IS - 10

M1 - 104044

ER -

ID: 298632975