Prachi Prajapati

Doctoral Researcher
International Max Planck Research School (IMPRS),
Bonn | Cologne

I work in multiwavelength observational cosmology, studying the formation and evolution of galaxies in the early universe. My PhD with Prof. Dominik Riechers (University of Cologne / MPIfR Bonn) has produced Vz-GAL, the far largest CO(1-0) cold gas catalog of dusty star-forming galaxies (DSFGs) across redshifts 1 to 6, a benchmark dataset until the advent of the ngVLA. Using CO(1-0), higher-J CO lines, [CI], and dust continuum observations, together with semi-empirical excitation models, my research constrains gas masses, depletion timescales, star formation efficiency, and gas-dust excitation in these distant galaxies.

Previously, I served as a Scientist/Engineer at the Physical Research Laboratory, Department of Space, Government of India, where I contributed to cutting-edge multiwavelength astronomy projects and the development of advanced ground-based optical and near-infrared instrumentation.

About

Hello! I am Prachi, an astrophysicist of Indian origin. I graduated with a major in Astrophysics from the Indian Institute of Space Science and Technology (IIST), after which I worked at the Physical Research Laboratory (PRL) as a Scientist/Engineer for nearly four years.

My research delves into the evolution of galaxies and physics of star formation in the early universe. By leveraging multi-wavelength datasets, ranging from radio to far-infrared, I integrate cutting-edge observations with semi-empirical models to precisely constrain gas properties, excitation processes, and cold gas dynamics in these distant galaxies.

I am currently a graduate researcher at the University of Cologne and hold a guest researcher position at the Max Planck Institute for Radio Astronomy (MPIfR) in Bonn. I collaborate with international teams across various leading observatories, and I am closely involved in projects such as the Vz-GAL and z-GAL, where I actively contribute to frontier research in the field. I am also a part of the SFB 1601, a collaborative research center by the German Science Foundation (DFG).

Research Interests

  • Multiwavelength Observational Cosmology
  • Large Surveys of High-z Galaxies
  • Galaxy Formation and Evolution
  • Cosmic Star Formation History
observations_galaxies
DSFG_early_universe

Contact

Office

Room 211, I. Institute of Physics (PH1), University of Cologne, 50937 Germany


Email

prajapati [at] ph1.uni-koeln.de