j. colin hill

jch2200 at columbia dot edu

affiliation:

assistant professor, department of physics, columbia university

research interests:

My research is in physical cosmology. I analyze cosmological data to search for evidence of new physics and to understand processes involved in structure formation. Much of my work focuses on the cosmic microwave background radiation. I am a member of the Atacama Cosmology Telescope, Simons Observatory, and CMB-S4 collaborations, as well as the Rubin Observatory LSST Dark Energy Science Collaboration.

I am grateful to the NSF, NASA, DOE, Sloan Foundation, and Simons Foundation for support.

CV
papers

current group members:

Shivam Pandey (postdoc)
Oliver Philcox (postdoc)

Aleksandra (Ola) Kusiak (Ph.D. student)
Kristen Surrao (Ph.D. student)
Alina Sabyr (Ph.D. student)
Samuel Goldstein (Ph.D. student)
Michael Rodriguez (Bridge Program scholar)

former group members:

Boris Bolliet (postdoc --> Cambridge)
Lucie Afko (Simons-NSBP intern --> Duke)

research highlights, code, and data products:

GitHub
pyilc (Needlet ILC in Python) (see McCarthy & Hill (2023))
NILC y-maps from Planck PR4 NPIPE data (see McCarthy & Hill (2023))
MCMC chains from ACT early dark energy analysis (see Hill et al. (2021); also on LAMBDA)
MCMC chains from early dark energy analysis and Modified CLASS Einstein-Boltzmann code for EDE calculations (see Hill, McDonough, Toomey, & Alexander (2020))
Compton-y maps from ACT (2014-15) + Planck (PR3) data on LAMBDA (see Madhavacheril, Hill, Naess, et al. (2020))
Simons Observatory component-separated noise power spectra (see SO Collaboration (2019))
CMB-S4 component-separated noise power spectra (see CMB-S4 Decadal Survey Report)
Multi-tracer CMB delensing maps from Planck and WISE data (see Yu, Hill, & Sherwin (2017))
Fisher code for CMB spectral distortion forecasting (see Abitbol, Chluba, Hill, & Johnson (2017))
Compton-y map from Planck HFI data (see Hill & Spergel (2014))
tSZ power spectrum Fisher matrices (see Hill & Pajer (2013))
mangle software (see Swanson, Tegmark, Hamilton, & Hill (2008))

in the media:

EDE + Lya (cf. Goldstein, Hill, Irsic, & Sherwin (2023)):
Nature
Science
Physics

Advanced SO:
Columbia News
NSF News

EDE (cf. Hill et al. (2021)):
Nature
How Stuff Works

Kinematic SZ (cf. Hill, Ferraro, et al. (2016) and Ferraro, Hill, et al. (2016)):
Discover
Quanta

B-modes (cf. Flauger, Hill, and Spergel (2014)):
NY Times
Washington Post
The Guardian
Nature
Quanta
Daily Californian

elsewhere:

Buchalter Prize (January 2023)
Sloan Fellowship (February 2022)
Public Talk at Nevis Laboratories (February 2023)
Aspen Center for Physics Colloquium (September 2021)
Public Talk at Aspen Center for Physics on the Hubble Conundrum (August 2020)
YouTube Cosmology Talk on Early Dark Energy and Cosmological Concordance (May 2020)
``Dust, Distortions, and Shadows in the Universe's Oldest Light'', cover article for Spring 2015 issue of Sigma Pi Sigma Radiations
interview on ``These Vibes Are Too Cosmic'', WPRB 103.3 FM, Princeton
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