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X-WR-CALNAME;VALUE=TEXT:ITC Seminar - Julian Munoz (Harvard Physics) 
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SUMMARY:ITC Seminar - Julian Munoz (Harvard Physics) 
DESCRIPTION:<p>	"Learning Cosmology with the First Stars"</p><p>	I will describe how upcoming 21-cm measurements during cosmic dawn will provide a trove of new cosmological information. This era saw the formation of the first stars, which excited neutral hydrogen and allowed it to absorb 21-cm photons from the CMB. The timing of this signal carries information on the abundance of the small mini-halos that hosted the first stars, allowing us to probe the matter power spectrum at smaller scales than currently possible. Moreover, I will describe how the relative velocities between dark matter and baryons are imprinted onto the 21-cm power spectrum during cosmic dawn, resulting in robust velocity-induced acoustic oscillations (VAOs). These act as a new standard ruler at z=20, opening up searches for the early dark energy argued to resolve the H0 tension.</p>
LOCATION:Phillips
STATUS:CONFIRMED
DTSTART:20200211T170000Z
DTEND:20200211T180000Z
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