• Hi! I'm
    Johannes

    Post-doc in astrophysics

  • I study
    galaxies

    and their cosmic evolution

  • I measure
    light pollution

    to protect the natural night sky

About

Who Am I?

I am post-doc at the Argelander-Institute for Astronomy in Bonn. My research is about the cosmic evolution of galaxies: How did galaxies form in the early Universe and how did they evolve into the galaxies that we observe today? To find answers to these questions, I utilize multi-wavelength observations obtained with the largest telescopes in the world such as the Atacama Large Millimeter Array or the Very Large Telescope in Chile.
I have experience in the exploitation of large astrophysical datasets, covering wavelengths from the far-ultraviolet (e.g. Lyman continuum) to the radio (e.g. hyperfine transition of hydrogen at 21cm). In particular I am interested in multi-line spectroscopy.
Moreover, as an observational astronomer I am concerned about the development of light pollution. Around the world, we see an increase in night sky brightness. In order to preserve the natural night sky for future generations to come, I am involved in light pollution research activities, where I mainly contribute with my astrophysical expertise.
In my free time, I like to take pictures. Some of my best shots are found in my photo gallery.

Galaxies

Telescopes

Spectroscopy

Light Pollution

I am happy to say that
I participated in 50+ scientific papers so far!

Hire me
What I do?

Here are some of my expertise

Programming

  • Python: numpy, scipy, astropy, matplotlib
  • IDL: astrolib, coyote
  • Qt5
  • HTML/PHP
  • C/C++

Data Science, ML

  • Bayesian statistics: MCMC, neural networks
  • Monte Carlo Simulation
  • Chi2 test
  • Regression analysis

Modeling

Data Reduction

  • CASA
  • GILDAS
  • Miriad
  • calcos (HST/COS)
  • pyRAF

Observing

  • APEX 12m
  • IRAM 30m
  • OSO 20m
  • NRO 45m
  • TNG/NICS
  • NOT/MOSCA

Teaching

  • introductory course in astronomy
  • interstellar medium
  • radio astronomy
  • theoretical physics
papers published as co-author
papers published as first author
observing proposals accepted as PI
hours spent observing
My Specialty

My Skills

Python

90%

Qt5

75%

IDL

65%

C/C++

70%

HTML/CSS/PHP/(my)SQL

90%

CASA/GILDAS

85%

Flask/Django

95%

Linux/Bash/Perl

90%
Milestones

Education

University of Stockholm, Sweden

Title of Dissertation: Molecular gas and ionizing radiation in star-forming galaxies

University of Stockholm, Sweden

Title of Licentiate Thesis: How ISM properties drive Lyman Continuum Escape

University of Vienna, Austria

Title of Thesis: Census of the Molecular Gas in Nearby Galaxies Selected from the CALIFA Survey

University of Vienna, Austria

Title of Thesis: Automatisierung von Messungen der Himmelshintergrundhelligkeit an der Universitätssternwarte Wien

My lectures

Teaching

SS 2022 University of Bonn

  • astro822: Physics of the interstellar medium (*60%)

SS 2019 University of Bonn

* Fraction of teaching units held by myself.

Recent Work

First author Publications

Unveiling the gravitationally unstable disc of a massive star-forming galaxy using NOEMA and MUSE

published 2023 in Monthly Notices of the Royal Astronomical Society

Long-term trends of light pollution assessed from SQM measurements and an empirical atmospheric model

published 2022 in Monthly Notices of the Royal Astronomical Society

Correcting sky-quality-meter measurements for ageing effects using twilight as calibrator

published 2021 in Monthly Notices of the Royal Astronomical Society

Circalunar variations of the night sky brightness - an FFT perspective on the impact of light pollution

published 2020 in Monthly Notices of the Royal Astronomical Society

The Lyman continuum escape and ISM properties in Tololo 1247-232 - new insights from HST and VLA

published 2017 in Monthly Notices of the Royal Astronomical Society

The night sky brightness at Potsdam-Babelsberg including overcast and moonlit conditions

published 2014 in Journal of Quantitative Spectroscopy and Radiative Transfer

Night sky photometry and spectroscopy performed at the Vienna University Observatory

published 2014 in Journal of Quantitative Spectroscopy and Radiative Transfer
Get in Touch

Contact

johannes(at)jpuschnig.com

75753 Uppsala, Sweden