Physics and Astronomy Cosmology Seminar

Dartmouth Events

Physics and Astronomy Cosmology Seminar

Mariusz Dabrowski, Institute of Physics, University of Szczecin and Copernicus Center, Krakow, Poland

Wednesday, December 4, 2013
10:00am-11:00pm
Wilder 202
Intended Audience(s): Public
Categories: Lectures & Seminars
Title: "Testing Spherically Symmetric Inhomogeneous Pressure Cosmology"
 
Abstract:  The spherically symmetric inhomogeneous pressure Stephani universes are complementary to the spherically symmetric inhomogeneous density Lemaitre-Tolman- Bondi (LTB) models in the sense that unlike in LTB models the energy density is homogeneous but the pressure is not. In the talk, I will discuss the basic properties of the Stephani universes including their totally spacetime inhomogeneous (i.e. non- spherically symmetric) case. Then, I will discuss the observational validity of some exact spherically symmetric Stephani models in the context of supernovae data (for both centrally-placed and off-center observers), baryon acoustic oscillations, CMB shift parameter, and the redshift drift (or Sandage-Loeb) test. The latter is hoped to be reachable by next generation extremely large telescopes as well as by planned space-borne gravitational wave interferometers.

 

For more information, contact:
Tressena Manning
603-646-2854

Events are free and open to the public unless otherwise noted.