Joint cosmology seminar at Tufts:

Tuesday, April 17, 2018, 2:30 pm
574 Boston Ave, Room 310
Tufts University
Refreshments at 2:00 outside room 304

The Acceleration of the Universe and Dark Energy Properties as Functions of Redshift

Ruth Daly
Penn State

Abstract:

The expansion and acceleration histories of the universe and the properties of the dark energy as functions of redshift from a redshift of zero to about 1.5 obtained with recently published data will be presented and discussed. The acceleration and expansion histories, obtained independent of a theory of gravity and the contents of the universe, will be compared with theoretical predictions obtained in the context of GR. The properties of the dark energy such as the pressure, energy density, equation of state, kinetic energy density, and potential energy density obtained as functions of redshift in the context of GR will also be presented and discussed.