Benjamin Joachimi

Argelander-Institut für Astronomie                        

Research interests:                                                                       

• Intrinsic alignment of galaxies

• Control of systematics in cosmic shear measurements

• Parameter forecasts for cosmic shear surveys                      
  

• Covariances of cosmic shear statistics

• The ESA Euclid satellite project
  

• HOLIGRAIL Project: Long-term monitoring of gravitational lens systems at Hoher List Observatory

• formerly: Tutorial of the exercises "Einführung in die Astronomie" (introductory astronomy), part I and II

• Tutorial of the advanced lab course experiment "Optische Astronomie und Gravitationslinsen" (optical astronomy and gravitational lenses)
  

• B. Joachimi, P. Schneider & T. Eifler: Analysis of two-point statistics of cosmic shear - III. Covariances of shear measures made easy

• B. Joachimi & P. Schneider: The removal of shear-ellipticity correlations from the cosmic shear signal by nulling techniques  

• T.D. Kitching, A. Amara, F.B. Abdalla, B. Joachimi & A. Refregier: Cosmological Systematics Beyond Nuisance Parameters : Form Filling Functions

• B. Joachimi & P. Schneider: The removal of shear-ellipticity correlations from the cosmic shear signal:
  Influence of photometric redshift errors on the nulling technique

• B. Joachimi, X. Shi & P. Schneider: Bispectrum covariance in the flat-sky limit

• T. Schrabback, J. Hartlap, B. Joachimi, M. Kilbinger et al.: Evidence for the accelerated expansion of the Universe from weak lensing tomography with COSMOS

• B. Joachimi & S.L. Bridle: Simultaneous measurement of cosmology and intrinsic alignments using joint cosmic shear and galaxy number density correlations

• Diplomarbeit/ Diploma thesis project: "Analysis of second-order statistics of cosmic shear: Covariances and contamination by shear-ellipticity correlations"
  

  Download:  ps  |  pdf

• advanced lab course documentations/FP-Protokolle
  

• the Argelander-Institut für Astronomie (AIfA) at the University of Bonn
• the University of Bonn
• the city of Bonn
• the Astronomy Picture of the Day