School of Physical and Chemical Sciences Te Kura Matū Seminar Series

Possible constraints on neutrino mass and dark energy parameter from the lensing dispersion of the magnitude-redshift relation of Type Ia supernovae

Speaker

Professor Toshifumi Futamase

Institute

Department of Astrophysics and Atmospheric physics, Kyoto Sangyo University, Japan

Time & Place

Fri, 17 May 2019 11:00:00 NZST in West 701, Level 7

All are welcome

Abstract

Large scale structure in the universe brings about inevitable noises to any cosmological observation by its weak lensing effect.  However it also carries important cosmological information if we can predict the detail of the effect.

In this talk l consider the effect on the magnitude-redshift relation of type Ia supernovae as an example. I show that the observation of the effect can be used to constrain the total neutrino mass of the order of 0.5 eV which is comparable to CMB alone and dark energy property by future imaging surveys with the Wide-field Infrared Survey Telescope and Large Synoptic Survey Telescope.

Also possible improvements of the constraints are discussed.

 

All Welcome