About Me

I am a PhD student in the Star-Formation Group of Prof. Dr. Ralf Klessen at Institute of Theoretical Astrophysics, Heidelberg. My main research interests lie in the field of first star formation, i.e. the evolution of Population III (Pop III) stars and the effects of their radiative feedback on their surroundings. In particular, I use (magneto-) hydrodynamical simulations to study the influence of turbulence and magnetic fields on the formation of Pop III stars. Furthermore, together with collaborateurs at Portsmith University and at NAOJ, Tokyo, I studied the relevance of photoevaporations of primordial minihalos by nearby Pop III stars and the subsequent minihalo evolution including chemical mixing when the Pop III star goes off as supernova.

I am member of the International Max Planck Research School for Astronomy and Cosmic Physics at the University of Heidelberg (IMPRS-HD) and the Heidelberg Graduate School of Fundamental Physics (HGSFP).

Education

Ruprecht-Karls-University, Heidelberg, Germany

PhD in Astronomy 2014 - today

Member of IMPRS-HD
Supervisors: Prof. Dr. Ralf Klessen, apl. Prof. Dr. Simon Glover

Ludwig-Maximilians-University, Munich, Germany

Master of Science in Physics 2012-2014

Master Thesis: 'Non-Linear Structure Formation in Scalar-Tensor Gravity'
University Observatory, Munich, Germany
Supervisor: Prof. Dr. Jochen Weller

University of Sussex, Falmer, Brighton, UK

Postgraduate Diploma in Physics (EuroMasters) 2012-2013

Supervisor: Prof. Dr. Xavier Calmet

Ludwig-Maximilians-University, Munich, Germany

Bachelor of Science in Physics 2009-2012

Bachelor Thesis: 'Galactic Magnetic Fields'
University Observatory, Munich, Germany
Supervisor: Prof. Dr. Harald Lesch

Gymnasium Christian-Ernestinum, Bayreuth, Germany

Abitur 2009

Focus subjects: Physics, Latin, Religious Education, Geography

Publications

Stabilizing Population III Accretion Disks with Magnetic Fields
Wollenberg, Katharina M. J.; Glover, Simon C. O.; Bromm, Volker; Klessen, Ralf S. Proceedings article in Memorie Della Società Astronomica Italiana, Vol. 88 n.4, 2017, p. 864-865

How the First Stars Regulated Star Formation. II. Enrichment by Nearby Supernovae
Chen, Ke-Jung; Whalen, Daniel J.; Wollenberg, Katharina M. J.; Glover, Simon C. O.; Klessen, Ralf S.
ApJ (2017), 844, 111

Computational

Experience

  • Numerical codes: Arepo, FLASH, ZEUS-MP
  • Programming languages & software: Python, YT, Fortran, C, LaTeX, Gnuplot

Get In Touch.

Contact Details

Katharina Wollenberg
Institute of Theoretical Astrophysics
Albert-Ueberle-Str. 2
69120 Heidelberg, Germany

k.wollenberg@stud.uni-heidelberg.de