Universitätssternwarte - LMU Jochen Weller
Universitätssternwarte - LMU

Welcome to my homepage. I am a Professor at the Department of Physics at Ludwigs-Maximilians University, Munich, where I work at the University Observatory and Cluster of Excellence for Origin and Structure of the Universe.

Here you can find a description of my cosmology research team and the research we do.
Research Areas     Recent Publications     List of publications
Dark Energy -- is a way to model the observed accelerated expansion of the universe with scalar fields or other forms of vacuum energy. My main interest is how we can learn more about dark energy with observations. I am also a member of the Dark Energy Survey (DES) team.

Modified Gravity -- Dark Energy is not the only possibilty to explain the observed accelerated expansion of the Universe. Modifactions to Einstein's general relativity on large scales could be a valid explanation for the observations. I am investigating how to constrain such theories and how to distinguish them from Dark Energy with observations.

Clusters of Galaxies -- Clusters of Galaxies are the largest overdense structures in the Universe. I am interested in the physics of these objects and how they can be exploited to test cosmology. Possibilities of measurements of clusters of galaxies are cosmic microwave background (Sunyaev-Zel'dovich effect) and lensing. To the later I am a member of the EUCLID collaboration.

Cosmic Microwave Background -- My main interest here is how secondary effects, like reionization and the integrated Sachs-Wolfe effect affect the anisotropy power spectrum and how they can be used to constrain cosmological and astrophysical parameters. I am a member of the Planck Collaboration. I am also a intrested in learning about the reionization phase of the Universe with the help of 21cm observations and how to correlate with CMB anisotropies. I am a member of the LOFAR collaboration, which is a 21cm expremiment based in the Netherlands.

Dark Energy Survey Year 1 Results: Measurement of the Baryon Acoustic Oscillation scale in the distribution of galaxies to redshift 1
The Dark Energy Survey Collaboration, et al.
PREPRINT arXiv:1712.06209.

Baryon Content in a Sample of 91 Galaxy Clusters Selected by the South Pole Telescope at 0.2 < z < 1.25
Chiu, I., et al.
PREPRINT arXiv:1711.00917.

Dark Energy Survey Year 1 Results: A Precise H0 Measurement from DES Y1, BAO, and D/H Data
DES Collaboration, et al.
PREPRINT arXiv:1711.00403.

The Splashback Feature around DES Galaxy Clusters: Galaxy Density and Weak Lensing Profiles
Chang, C., et al.
PREPRINT arXiv:1710.06808.

Contact and Personal Information     Teaching
email: jochen.weller(at)usm.uni-muenchen.de

Universitätssternwarte München
Ludwigs-Maximilians-Universität München
Scheinerstr. 1
81679 München
Tel. +49 (0) 89 2180 5976

CV: Resume
List of publications Publications at INSPIRE   Publications at ADS  Publications at XXX

Cosmology and Large-Scale Structure Thursdays, 12:15-13:45, USM Lecture Theatre
Tutorials: Thursdays, 10:30-12:00 (Hoersaal USM), 14:00-15:30 (Seminar Room Laplace Strasse, USM)
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