|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 listsCambridge Café Scientifique Cambridge Realist Workshop Acoustics Lab Seminars
Other talksMechanisms for encoding integrated calcium signatures in plants Designing cities to improve health and well-being: contributions from the HABITAT multilevel longitudinal study of Brisbane (Australia) neighbourhoods The 2015 Pregnancy Summit Emergent Syntax: a new (unifying) perspective Cambridge in the Fifties and Sixties: an extended conversation The role of cystine-knot proteins in vertebrate immunity to Staphylococcus aureus