ECO-spotting: looking for extremely compact objects with bosonic fields
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ECO-spotting : looking for extremely compact objects with bosonic fields. / Cardoso, Vitor; Macedo, Caio F. B.; Maeda, Kei-ichi; Okawa, Hirotada.
I: Classical and Quantum Gravity, Bind 39, Nr. 3, 034001, 03.02.2022.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - ECO-spotting
T2 - looking for extremely compact objects with bosonic fields
AU - Cardoso, Vitor
AU - Macedo, Caio F. B.
AU - Maeda, Kei-ichi
AU - Okawa, Hirotada
PY - 2022/2/3
Y1 - 2022/2/3
N2 - Black holes are thought to describe the geometry of massive, dark compact objects in the Universe. To further support and quantify this long-held belief requires knowledge of possible, if exotic alternatives. Here, we wish to understand how compact can self-gravitating solutions be. We discuss theories with a well-posed initial value problem, consisting in either a single self-interacting scalar, vector or both. We focus on spherically symmetric solutions, investigating the influence of self-interacting potentials into the compactness of the solutions, in particular those that allow for flat-spacetime solutions. We are able to connect such stars to hairy black hole solutions, which emerge as a zero-mass black hole. We show that such stars can have light rings, but their compactness is never parametrically close to that of black holes. The challenge of finding black hole mimickers to investigate full numerical-relativity binary setups remains open.
AB - Black holes are thought to describe the geometry of massive, dark compact objects in the Universe. To further support and quantify this long-held belief requires knowledge of possible, if exotic alternatives. Here, we wish to understand how compact can self-gravitating solutions be. We discuss theories with a well-posed initial value problem, consisting in either a single self-interacting scalar, vector or both. We focus on spherically symmetric solutions, investigating the influence of self-interacting potentials into the compactness of the solutions, in particular those that allow for flat-spacetime solutions. We are able to connect such stars to hairy black hole solutions, which emerge as a zero-mass black hole. We show that such stars can have light rings, but their compactness is never parametrically close to that of black holes. The challenge of finding black hole mimickers to investigate full numerical-relativity binary setups remains open.
KW - exotic compact objects
KW - boson stars
KW - compact objects
KW - SOLITON STARS
U2 - 10.1088/1361-6382/ac41e7
DO - 10.1088/1361-6382/ac41e7
M3 - Journal article
VL - 39
JO - Classical and Quantum Gravity
JF - Classical and Quantum Gravity
SN - 0264-9381
IS - 3
M1 - 034001
ER -
ID: 298629241