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ChangHoon Hahn committed Nov 13, 2024
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Expand Up @@ -34,49 +34,47 @@ <h1><a href="index.html">ChangHoon Hahn</a></h1>
I'm a postdoc at the
<a href="https://web.astro.princeton.edu/"><font
color='DarkBlue'>Princeton Dept of Astrophysical Sciences
</font></a>. My research focuses on applying cutting-edge machine learning (ML) methods
to the millions of galaxies observed by
spectroscopic surveys to answer fundamental questions in cosmology and
galaxy evolution:
</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 research is highly multi-disciplinary.
I develop new statistical and ML methods
<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>,
<a href="https://github.com/changhoonhahn/CausalFlow"><font color='DarkBlue'>Causalflow</font></a>).
I am also an expert in large-scale structure cosmology and galaxy evolution.
My work leverages my expertise in both observations and
theory/computation.
I am leading ongoing and upcoming galaxy surveys: the

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'>
Dark Energy Spectroscopic Instrument
DESI
</font></a>
(DESI) and the
survey and the upcoming
<a href="https://pfs.ipmu.jp/"><font color='DarkBlue'>
Subaru Prime Focus Spectrograph
</font></a> (PFS).
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.
At the same time, I lead the
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>
Collaboration and I am a member of the
<font color='DarkBlue'>(SimBIG</font></a>,
<a href="https://quijote-simulations.readthedocs.io/en/latest/">
<font color='DarkBlue'>Quijote</font></a>,
<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>,
and
<font color='DarkBlue'>(CAMELS</font></a>,
<a href="https://iqcollaboratory.github.io/">
<font color='DarkBlue'>IQ</font></a> collaborations.
<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 Princeton, I was a postdoc fellow at the
Expand All @@ -91,7 +89,7 @@ <h1><a href="index.html">ChangHoon Hahn</a></h1>
src="https://chahah-changbot.hf.space"
frameborder="0"
width="600"
height="600"></iframe>
height="700"></iframe>

<footer>
&copy; 2024 ChangHoon Hahn <br>
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