Ue-Li Pen (CITA) - November 5, 2018 at 12:10 pm
Abstract: We show how galaxy spin alignment directly measures the initial tidal field, thus doubling the information content of galaxy surveys. The initial density field can be recovered to $k\sim 1$ using spin alignment and non-linear galaxy displacement reconstruction, separately. By measuring two scalar fields, we measure the gravitational field of cold dark matter and neutrinos. A next generation 21cm survey can achieve the required sensitivity to measure the contribution of primordial neutrinos to galaxy spin.
The seminar will be held in 131A Campbell Hall.
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