Matches in SemOpenAlex for { <https://semopenalex.org/work/W2593804573> ?p ?o ?g. }
- W2593804573 abstract "Motivated by tension between the predictions of ordinary cold dark matter (CDM) and observations at galactic scales, ultralight axionlike particles (ULALPs) with mass of the order ${10}^{ensuremath{-}22}text{ }text{ }mathrm{eV}$ have been proposed as an alternative CDM candidate. We consider cold and collisionless ULALPs produced in the early Universe by the vacuum realignment mechanism and constituting most of CDM. The ULALP fluid is commonly described by classical field equations. However, we show that, like QCD axions, the ULALPs thermalize by gravitational self-interactions and form a Bose-Einstein condensate, a quantum phenomenon. ULALPs, like QCD axions, explain the observational evidence for caustic rings of dark matter because they thermalize and go to the lowest energy state available to them. This is one of rigid rotation on the turnaround sphere. By studying the heating effect of infalling ULALPs on galactic disk stars and the thickness of the nearby caustic ring as observed from a triangular feature in the infrared astronomical satellite map of our galactic disk, we obtain lower-mass bounds on the ULALP mass of order ${10}^{ensuremath{-}23}$ and ${10}^{ensuremath{-}20}text{ }text{ }mathrm{eV}$, respectively." @default.
- W2593804573 created "2017-03-16" @default.
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- W2593804573 date "2017-02-28" @default.
- W2593804573 modified "2023-10-16" @default.
- W2593804573 title "New astrophysical bounds on ultralight axionlike particles" @default.
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- W2593804573 doi "https://doi.org/10.1103/physrevd.95.043542" @default.
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