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- W2129287056 abstract "If dark matter is made up of Weakly Interacting Massive Particles, the annihilation of these particlesresults in partial ionization and heating before the formation of the first stars. We investigatethe effect of gas heating on the expected Hydrogen 21cm power spectrum. Heating by particleannihilation results in a minimum in the power spectrum of 21cm fluctuations at the redshift atwhich the gas temperature equals the CMB temperature. Such a minimum is not expected inthe standard theory since the gas temperature in the absence of luminous sources or dark matterheating is always below the CMB temperature. Thus observations of the Hydrogen 21cm powerspectrum at multiple redshifts may help us obtain constraints on dark matter particle and haloproperties." @default.
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- W2129287056 date "2009-01-01" @default.
- W2129287056 modified "2023-09-27" @default.
- W2129287056 title "Dark Matter Annihilation and Hydrogen 21cm Cosmology" @default.
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