I am a 4th-year PhD Candidate working at the Department of Astrophysical Sciences at Princeton University. I am advised by Peter Melchior and David N. Spergel .
I work on applying Machine Learning and new statistical methods to astrophysics. My main astrophysical interests are extragalactic, but I am widely interested in almost all areas of astronomy. My thesis is focusing on constructing a link between low-dimensional representations made from dark-matter only cosmological simulations and observed galaxy spectra. This will be done in part with data from the upcoming surveys using the Prime Focus Spectrograph (PFS) , which I also spend a lot of time working on. For PFS, I mostly focus on learning more about the ways we can use the emission of the atmosphere itself, called airglow, to improve the performance of our surveys. Outside of PFS, I am also a member of the Learning the Universe (LtU) collaboration and the Legacy Survey of Space and Time Dark Energy Science Collaboration (LSST-DESC).
I am currently affiliated with multiple research groups including the Astro Data Lab, led by Peter Melchior, and the Cosmology x Data-science group at the
Flatiron Institute led by
Shirley Ho.
I can be found in the infamous graduate student basement
in Peyton Hall in Princeton (office 023A, Danish flags on the door), or at the Center for Computational Astrophysics (CCA) in New York City.
I am very passionate about showing our wonderful universe to the public, and I frequently lead the public observing nights at Peyton Hall, and I give outreach talks at Astronomy On Tap Trenton.
Outside of academia, I like all things to do with mountains (climbing, hiking, camping), with oceans/water (sailing, swimming, windsurfing), and gardening. I even like gardening so much that I have ended up being the coordinator of my local community garden.
Originally from Denmark, I obtained my Bachelor’s degree from the Niels Bohr Institute at the University of Copenhagen in 2021, with a thesis on Neutrino Detection in IceCube.
Last updated October 1st, 2024.
PhD in Astrophysicical Sciences, 2026
Princeton University
MA in Astrophysicical Sciences, 2023
Princeton University
BSc in Physics, 2021
University of Copenhagen
The biggest challenge for next-generation ground-based spectroscopic surveys is the emission from the atmosphere itself. The Subaru Night Sky Spectrograph (SuNSS) studies this emission, called airglow, which allows us to improve our calibrations, sky subtraction, and understanding of the airglow itself.
(that I remember)
I would never keep everything here up to date, so for an up-to-date list, instead look at the amazing NASA/ADS service. Sometimes, web services track my name as “Kragh Jespersen, Christian”, sometimes as “Jespersen, Christian Kragh” (the correct form), and sometimes as “Jespersen, Christian K.”, so I recommend using the above link to get correct results.
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