University of Cambridge > Talks.cam > Cosmology lunch > Detectable signature of first stars in 21-cm

Detectable signature of first stars in 21-cm

Add to your list(s) Download to your calendar using vCal

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.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2014 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity