Observational signatures of hot spots orbiting horizonless objects
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Observational signatures of hot spots orbiting horizonless objects. / Rosa, Joao Luis; Garcia, Paulo; Vincent, Frederic H.; Cardoso, Vitor.
I: Physical Review D, Bind 106, Nr. 4, 044031, 12.08.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Observational signatures of hot spots orbiting horizonless objects
AU - Rosa, Joao Luis
AU - Garcia, Paulo
AU - Vincent, Frederic H.
AU - Cardoso, Vitor
PY - 2022/8/12
Y1 - 2022/8/12
N2 - Pushed by a number of advances, electromagnetic observatories have now reached the horizon scale of supermassive black holes. The existence and properties of horizons in our universe is one of the outstanding fundamental issues that can now be addressed. Here we investigate the ability to discriminate between black holes and compact, horizonless objects, focusing on the lensing of hot spots around compact objects. We work in particular with boson and Proca stars as central objects, and show that the absence of a horizon gives rise to a characteristic feature-photons that plow through the central object and produce an extra image. This feature should be universal for central objects made of matter weakly coupled to the standard model.
AB - Pushed by a number of advances, electromagnetic observatories have now reached the horizon scale of supermassive black holes. The existence and properties of horizons in our universe is one of the outstanding fundamental issues that can now be addressed. Here we investigate the ability to discriminate between black holes and compact, horizonless objects, focusing on the lensing of hot spots around compact objects. We work in particular with boson and Proca stars as central objects, and show that the absence of a horizon gives rise to a characteristic feature-photons that plow through the central object and produce an extra image. This feature should be universal for central objects made of matter weakly coupled to the standard model.
KW - NEAR-INFRARED FLARES
KW - A-ASTERISK
KW - GRAVITATIONAL COLLAPSE
KW - OPTICAL APPEARANCE
KW - GENERAL-RELATIVITY
KW - BOSON
KW - SHADOW
U2 - 10.1103/PhysRevD.106.044031
DO - 10.1103/PhysRevD.106.044031
M3 - Journal article
VL - 106
JO - Physical Review D
JF - Physical Review D
SN - 2470-0010
IS - 4
M1 - 044031
ER -
ID: 321840802