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<!DOCTYPE HTML>
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<head>
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<title>ChangHoon Hahn --- Bio</title>
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<header>
<a href="index.html"><img src="images/wedding.png" alt="me"></a>
<h1><a href="index.html">ChangHoon Hahn</a></h1>
<ul>
<li></li>
<li><a href="publications.html">Publications</a></li>
<li><a href="cv/CV.pdf">CV</a></li>
<li><a href="code.html">Code</a></li>
</ul>
</header>
<section id="bio">
I'm an assistant professor at the
<a href="https://astro.arizona.edu/"><font
color='DarkBlue'>Univ. of Arizona Dept of Astronomy and Steward
Observatory
</font></a>. My research develops and applies cutting-edge machine learning (ML) methods
to the millions of galaxies observed by galaxy surveys to answer fundamental questions in
cosmology and galaxy evolution:
What is the nature of dark energy that drives the accelerated expansion
of the Universe?
What is the sum of neutrino masses?
How does the underlying dark matter environment of galaxies impact their evolution?
<br><br>
My work lies in the intersection of large-scale structure cosmology and galaxy evolution
and leverages my expertise in observations, simulations, and ML.
I lead the ongoing
<a href="https://www.desi.lbl.gov/"><font color='DarkBlue'>
DESI
</font></a>
survey and the upcoming
<a href="https://pfs.ipmu.jp/"><font color='DarkBlue'>
PFS
</font></a>
survey.
I served as a co-chair of the DESI
<a href="https://ui.adsabs.harvard.edu/abs/2022arXiv220808512H/abstract"><font color='DarkBlue'>
Bright Galaxy Survey
</font></a>
Working Group and I am currently a co-leader of the PFS Cosmology Survey.
I also lead the collaborations building state-of-the-art cosmological simulations
<a href="https://changhoonhahn.github.io/simbig/current/">
<font color='DarkBlue'>(SimBIG</font></a>,
<a href="https://quijote-simulations.readthedocs.io/en/latest/">
<font color='DarkBlue'>Quijote</font></a>)
and testing galaxy formation models
<a href="https://camels.readthedocs.io/en/latest/">
<font color='DarkBlue'>(CAMELS</font></a>,
<a href="https://iqcollaboratory.github.io/">
<font color='DarkBlue'>IQ</font></a>).
Lastly, I develop statistical and ML tools that can unlock the scientific potential of
astronomical datasets
<a href="https://changhoonhahn.github.io/provabgs/current/"><font
color='DarkBlue'>(PROVABGS</font></a>,
<a href="https://changhoonhahn.github.io/SEDflow/current/"><font
color='DarkBlue'>SEDflow</font></a>).
<br><br>
Before Arizona, I was a research scholar at the <a href="https://web.astro.princeton.edu/"><font color='DarkBlue'>
Princeton Dept. of Astrophysical Sciences</font></a> and a
postdoc fellow at the
<a href="http://www.lbl.gov/"><font color='DarkBlue'>Lawrence Berkeley National Lab</font></a>
and
<a href="http://bccp.berkeley.edu/"><font color='DarkBlue'>UC Berkeley Center for Cosmological Physics</font></a>.
I completed my PhD in Physics at NYU
<a href="http://cosmo.nyu.edu/"><font color='DarkBlue'>Center for Cosmology and Particle Physics</font></a>.
</section>
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<footer>
© 2024 ChangHoon Hahn <br>
feel free to drop me at a line at
<a href="mailto:[email protected]">[email protected]</a>.
</footer>
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