The stochastic gravitational-wave background in the absence of horizons
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The stochastic gravitational-wave background in the absence of horizons. / Barausse, Enrico; Brito, Richard; Cardoso, Vitor; Dvorkin, Irina; Pani, Paolo.
I: Classical and Quantum Gravity, Bind 35, Nr. 20, ARTN 20LT01, 25.10.2018.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - The stochastic gravitational-wave background in the absence of horizons
AU - Barausse, Enrico
AU - Brito, Richard
AU - Cardoso, Vitor
AU - Dvorkin, Irina
AU - Pani, Paolo
PY - 2018/10/25
Y1 - 2018/10/25
N2 - Gravitational-wave astronomy has the potential to explore one of the deepest and most puzzling aspects of Einstein's theory: the existence of black holes. A plethora of ultracompact, horizonless objects have been proposed to arise in models inspired by quantum gravity. These objects may solve Hawking's information-loss paradox and the singularity problem associated with black holes, while mimicking almost all of their classical properties. They are, however, generically unstable on relatively short timescales. Here, we show that this 'ergoregion instability' leads to a strong stochastic background of gravitational waves, at a level detectable by current and future gravitational-wave detectors. The absence of such background in the first observation run of Advanced LIGO already imposes the most stringent limits to date on black-hole alternatives, showing that certain models of 'quantum-dressed' stellar black holes can be at most a small percentage of the total population. The future LISA mission will allow for similar constraints on supermassive black-hole mimickers.
AB - Gravitational-wave astronomy has the potential to explore one of the deepest and most puzzling aspects of Einstein's theory: the existence of black holes. A plethora of ultracompact, horizonless objects have been proposed to arise in models inspired by quantum gravity. These objects may solve Hawking's information-loss paradox and the singularity problem associated with black holes, while mimicking almost all of their classical properties. They are, however, generically unstable on relatively short timescales. Here, we show that this 'ergoregion instability' leads to a strong stochastic background of gravitational waves, at a level detectable by current and future gravitational-wave detectors. The absence of such background in the first observation run of Advanced LIGO already imposes the most stringent limits to date on black-hole alternatives, showing that certain models of 'quantum-dressed' stellar black holes can be at most a small percentage of the total population. The future LISA mission will allow for similar constraints on supermassive black-hole mimickers.
KW - gravitational waves
KW - black holes
KW - event horizon
KW - MASSIVE BLACK-HOLES
KW - NUCLEAR STAR-CLUSTERS
KW - GENERAL-RELATIVITY
KW - HOST GALAXIES
KW - COLLAPSE
KW - EVOLUTION
U2 - 10.1088/1361-6382/aae1de
DO - 10.1088/1361-6382/aae1de
M3 - Journal article
VL - 35
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
SN - 0264-9381
IS - 20
M1 - ARTN 20LT01
ER -
ID: 299199655