KICP Seminars & Colloquia, Summer 2012

Seminar schedule for Summer 2012
August 22, 2012
Open Group seminar
Kazuya Koyama
University of Portsmouth
Non-linear structure formation in modified gravity models   [Abstract]
September 17, 2012
Open Group seminar
Amanda Yoho
Case Western Reserve University
Boosting Our Universe: Observational consequences of our galaxy's motion
 
OPEN GROUP SEMINARS

  • August 22, 2012 | 12:00 PM | LASR Conference Room
    Non-linear structure formation in modified gravity models
    Kazuya Koyama, University of Portsmouth

    The discovery of the accelerated expansion of the Universe has come relatively late in our study of the cosmos, but in showing that gravity can act repulsively, it has opened up many new questions about the nature of gravity and what the Universe might contain. Is the acceleration being driven by dark energy? Or is general relativity (GR) itself in error, requiring a modification at large scales to account for the late acceleration? Structure formation in our Universe can be different even if the geometry of the homogeneous and isotropic universe is the same in these two classes of models, offering a possibility to distinguish between them observationally. Non-linear structure formation is complicated by the fifth force that commonly appears in modified gravity models and new techniques are required to analyse it. We will discuss innovative methods to test GR on non-linear scales, building on the recent developments of N-body simulations for modified gravity.
  • September 17, 2012 | |
    Boosting Our Universe: Observational consequences of our galaxy's motion
    Amanda Yoho, Case Western Reserve University