Theoretical High Energy Physics

Cosmology and Astroparticle Physics

University of Bielefeld

Faculty

Dietrich Bödeker
Mikko Laine
Dominik J. Schwarz

Aleksi Vuorinen
 

Postdocs

Christian Byrnes
Valeri Dikarev
Zong Kuan Guo

Obituary: Dr. Alexey Anisimov

Research Topics

Baryogenesis, or why is there more matter in the Universe than antimatter?
The nature of dark matter, or what is the source of the excess gravitational pull observed in galactic systems?
The nature of dark energy, or what is the physics determining the accelerated expansion of the Universe?
The origin of large scale structures (galaxies, galaxy clusters, etc.) in the Universe, or how do structures grow?
Other topics of interest are cosmological inflation and primordial non-Gaussianity, phase transitions in the early Universe, compact stars,
cosmological constraints on physics beyond the Standard Model.

Useful links: Seminars (E6)

Colloquium     Journal club

Kosmologietag, May 5-6th 2011

A two day cosmology meeting in Bielefeld, please follow the link to the website to register

Ph.D. Students

Maik Stuke

Alexander Wiegand

Former Students
Alumni Site

Recent Publications (2010 preprints)

       Effects of a Cut, Lorentz-Boosted sky on the Angular Power Spectrum
       T. S. Pereira, A. Yoho, M. Stuke, G. Starkmann; 1009.4937 [astro-ph.CO]

       CMB Constraints on the energy scale of inflation
       Z-K. Guo, D. Schwarz, Y-Z. Zhang ; 1008.5258 [astro-ph.CO] 

       Scale-dependence of Non-Gaussianity in the Curvaton Model
       C. Byrnes, K. Enqvist, T. Takahashi; 1007.5148 [astro-ph.CO]

       Scale-dependent non-Gaussianity probes inflationary physics
       C. T. Byrnes, M. Gerstenlauer, S. Nurmi, G. Tasinato, D. Wands; 1007.4277 [astro-ph.CO]

       Inflationary infrared divergences: geometry of the reheating surface vs. delta N formalism
       C. Byrnes, M. Gerstenlauer, A. Hebecker, S. Nurmi, G. Tasinato; 1005.3307 [hep-th]

       CMB constraints on primordial non-Gaussianity from the bispectrum and trispectrum and a consistency test of single-field inflation
       J. Smidt, A. Amblard, C. Byrnes, A. Coorey, D. Munshi; 1004.1409 [astro-ph.CO]

      Large angle anomalies in the CMB
       D.J. Schwarz, D. Huterer, C.J. Copi, G.D. Starkman; 1004.5602 [astro-ph.CO]

      Missing power vs. low-l alignments in the cosmic microwave background: no correlation in the cosmological standard model
       D.J. Schwarz, D. Sarkar, D. Huterer, C.J. Copi, G.D. Starkman; 1004.3784 [astro-ph.CO]

      Large-scale suppression from stochastic inflation
       F. Kühnel, D. Schwarz ; 1003.3014 [hep-ph]

     Cosmological backreaction
       Dominik J. Schwarz; arXiv:1003.3026 [astro-ph.CO]

       Distinguishing standard reionization from dark matter models
       A. Natarajan, D. Schwarz; arXiv:1002.4405 [astro-ph.CO]

      Multi-scale cosmology and structure-emerging Dark Energy: a plausibility analysis
      Alexander Wiegand, Thomas Buchert; 1002.3912

      Review of local non-Gaussianity from multi-field inflation
       Christian Byrnes and Ki-Young Choi; arXiv:1002.3110 [astro-ph.CO]

      How the curvaton scenario, modulated reheating and an inhomogeneous end of inflation are related
       Laila Alabidi, Karim A. Malik, Christian Byrnes, Ki-Young Choi; arXiv:1002.1700 [astro-ph.CO]

     Slow-roll inflation with a Gauss-Bonnet correction
       Zong-Kuan Guo and Dominik J. Schwarz; arXiv:1001.1897 [hep-th]

        
      → more publications...



        Previous meetings                         

Block course on Cosmology 2009

International Workshop on
 Cosmic Large Scale Structure and Evolution 2009

5th Kosmologietag at IBZ, Bielefeld, May 6-7, 2010

4th Kosmologietag at IBZ, Bielefeld, May 8-9, 2009
3rd Kosmologietag at IBZ, Bielefeld, May 8-9, 2008
2nd Kosmologietag at IBZ, Bielefeld, 26-27 April 2007
Kosmologietag at IBZ, Bielefeld, 11-12 May 2006

Graduate School | Contact | Theory seminar | Colloquium | Jour Fixe | Theses