Joshiwa van Marrewijk

PhD Student at ESO

About Me

I feel privileged that I enjoy what I study. Astronomy is my passion. My studies enable me to combine my hobbies, like programming, with abstract complex concepts such as the origins and evolution of the Universe. In my free time, I enjoy listening to music and reading books. Some of my favorite authors are J.R.R. Tolkien, Arjen van Veelen, and Ilja Leonard Pfeijffer.

Furthermore, I like to play baseball, volleyball, or go surfing when the weather permits it. I enjoy delivering qualitative work by my metric. In life, I consider myself to be enthusiastic, driven, yet full of doubt. A friend of mine once said: "I am not sure; I love to doubt. Most people are too sure about things. Strong opinions held loosely; I love that."

Career Path

I am a second-year Ph.D. student at the European Southern Observatory (ESO), where I study the interplay between large hot gas reservoirs within galaxy clusters and the cold gas in and around galaxies. In my thesis, I explore non-conventional detection methods, such as Bayesian-forward-modelling techniques in the uv-plane, to analyze astrophysical processes associated with the ICM. To resolve the ICM, I typically use telescopes such as the Atacama Large Millimeter/submillimeter Array (ALMA) and the Atacama Cosmology Telescope (ACT). For the latter, I am an official junior member of the corresponding large collaboration. I am grateful to be supervised by T. Mroczkowski and G. Popping.

Before I joined ESO, I studied in Leiden for 6 years. I obtained my two bachelors in Astronomy and Physics, and I specialized in Astronomical Research during my master's. While in Leiden, I worked with J. Hodge, M. Rybak, S. Debackere, and H. Hoekstra.

For a more detailed overview of my current and previous work, please go to My Work and my CV.