|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Detectable signature of first stars in 21-cm
If you have a question about this talk, please contact Camille Bonvin.
In this talk I will show that first stars at z~20 leave detectable signature in the redshifted 21-cm line of neutral hydrogen. Two effects previously omitted in similar studies are responsible for a substantial enhancement in the expected signal: the relative motion between the dark matter halos and the in-falling gas, and the negative Lyman-Werner feedback of the starlight on star formation. I will explain how the two effects boost the power spectrum of the 21-cm signal thus making it more likely to be detected.
This talk is part of the Cosmology lunch series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsStudy Group on a Langlands Correspondence for Loop Groups Junior Geometry Seminar Humanitarian events
Other talksGandhi’s Realism: Means and Ends in Politics: Symposium & Lecture Class switch recombination defects The Dollar Shortage in Anglo-American Public Discourse, 1943-1960 CCfCS Modelling Workshop Pre-Processing for Approximate Bayesian Computation in Image Analysis Back to the Beginning in Cosmology and Experimental Radio Astronomy