Ue-Li Pen
Canadian Inst. Theor. Astroph. (CITA) (Toronto, Canada)
Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris
|
| « Mapping dark matter and neutrinos with cosmic tides » |
|
Ue-Li Pen |
| We apply CMB lensing techniques to large scale structure and solve for the 3-D cosmic tidal field. We use small scale filamentary structures to solve for the large scale tidal shear and gravitational potential. By comparing this to the redshift space density field, one can in principle measure the gravitational growth factor on large scales without cosmic variance. This potentially enables accurate measurements of neutrino masses. We relate the tidal fields to the squeezed limit bispectrum, and present initial results from simulations and data from the SDSS. |
|
vendredi 1 juin 2012 - 11:00 Amphithéâtre Henri Mineur, Institut d'Astrophysique de Paris |
| Page web du séminaire / Seminar's webpage |