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• W3044908022 abstract "If ultralight bosonic fields exist in nature as dark matter, superradiance spins down rotating black holes (BHs), dynamically endowing them with equilibrium bosonic clouds, here dubbed synchronized gravitational atoms (SGAs). The self-gravity of these same fields, on the other hand, can lump them into (scalar or vector) horizonless solitons known as bosonic stars (BSs). We show that the dynamics of BSs yield a new channel forming SGAs. We study BS binaries that merge to form spinning BHs. After horizon formation, the BH spins up by accreting the bosonic field, but a remnant lingers around the horizon. If just enough angular momentum is present, the BH spin up stalls precisely as the remnant becomes a SGA. Different initial data lead to SGAs with different quantum numbers. Thus, SGAs may form both from superradiance-driven BH spin down and accretion-driven BH spin up. The latter process, moreover, can result in heavier SGAs than those obtained from the former: in one example herein, $ensuremath{sim}18%$ of the final system's energy and $ensuremath{sim}50%$ of its angular momentum remain in the SGA. We suggest that even higher values may occur in systems wherein both accretion and superradiance contribute to the SGA formation." @default.
• W3044908022 created "2020-07-29" @default.
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• W3044908022 date "2020-11-16" @default.
• W3044908022 modified "2023-10-17" @default.
• W3044908022 title "Synchronized gravitational atoms from mergers of bosonic stars" @default.
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• W3044908022 doi "https://doi.org/10.1103/physrevd.102.101504" @default.
• W3044908022 hasPublicationYear "2020" @default.
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