PIRSA:15080010

Cosmological measurement of neutrino masses from relative velocities

Zhu, H. (2015). Cosmological measurement of neutrino masses from relative velocities. Perimeter Institute. https://pirsa.org/15080010

Zhu, Hong-Ming. Cosmological measurement of neutrino masses from relative velocities. Perimeter Institute, Aug. 11, 2015, https://pirsa.org/15080010 

          @misc{ pirsa_PIRSA:15080010,
            doi = {10.48660/15080010},
            url = {https://pirsa.org/15080010},
            author = {Zhu, Hong-Ming},
            keywords = {Cosmology, Other},
            language = {en},
            title = {Cosmological measurement of neutrino masses from relative velocities},
            publisher = {Perimeter Institute},
            year = {2015},
            month = {aug},
            note = {PIRSA:15080010 see, \url{https://pirsa.org}}
          }

Hong-Ming Zhu

National Astronomical Observatories, Chinese Academy of Sciences

Talk number
PIRSA:15080010
Collection
Talk Type
Subject
Abstract
Present day streaming motions of neutrinos relative to dark matter and baryons are several hundred km/s, comparable with their thermal velocity dispersion. This results in a unique dipole anisotropic distortion of the matter-neutrino cross power spectrum, which is observable through the dipole distortion in the cross correlation of different galaxy populations. Such a dipole vanishes if not for this relative velocity and so it is a clean signature for neutrino mass. We estimate the size of this effect and find that current and future galaxy surveys may be sensitive to these signature distortions.