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Probing Minihalos in the Late Dark Ages through Velocity Acoustic Oscillations in the 21-cm Power Spectrum
In the Dark Ages, minihalos above the Jeans mass accrete gas from the intergalactic medium (IGM). The accreted gas would be heated to virial temperature and produces 21 cm signal in emission, while the majority of gas retained in the IGM is cold and has 21 cm signal in absorption. The 21 cm signal o
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