Carnegie Mellon University

Rupert A. C. Croft

Professor of Physics

Astrophysics and Cosmology
Wean Hall 8311


Prof. Rupert Croft

Education & Professional Experience

D. Phil.: Oxford University (U.K.), Astrophysics (1995)
B. Sc.: Imperial College (U.K.), Physics (1991)




Curriculum Vitae

Professor of Physics, Carnegie Mellon University, 2014–

Leverhulme Visiting Professor, Oxford University (U.K.), 2012 

Indefinite Tenure, Carnegie Mellon University, 2009
Associate Professor, Carnegie Mellon University, 2004–2014
Assistant Professor, Carnegie Mellon University, 2001–2004
Post-doctoral Research: Harvard-Smithsonian Center for Astrophysics, 1998–2001
Post-doctoral Research: Ohio State University (Astrophysics), 1995–98

Research Interests

Cosmology has a "Standard Model", which includes the Big Bang, Inflation, and Dark Matter. Using this framework, Physical cosmologists are beginning to understand how structures form, how the action of gravity amplifies initially tiny perturbations, giving rise to galaxies, stars and ultimately our own planet. My research uses as a tool computer simulation codes (running on parallel computing facilities established in the Physics department) which evolve model universes forwards in time, subject to the laws of Physics which have been included: gravity, gas dynamics, radiative cooling and so on. Our analytical theories of how astrophysical processes take place can be checked with these numerical experiments, which also provide predictions to be compared with observational data.

I study the Universe both at high and low redshift, using this approach, looking at structure traced by galaxy clusters, galaxies, and intergalactic gaseous filaments seen as absorption features in the spectra of quasars. By working closely with observational astrophysicists at CMU I aim to make use of the enormous quantities of data from new telescopes, satellites and surveys. Our Universe is the ultimate physics laboratory, and these new data contain information which will constrain not only our theories of structure formation within the Universe, but also the physical processes and parameters which govern its global evolution.

Selected Publications

Rupert A.C. Croft et al., Intensity mapping with SDSS/BOSS Lyman-α emission, quasars, and their Lyman-α forest, MNRAS 481, 1320 (2018)

R.A.C. Croft, A. Romeo, R. Benton Metcalf, Weak lensing of the Lyman-α forest, MNRAS 477, 1814 (2018)

Michael R. Blanton et al., Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe, Astronomical J. 154, 1 (2017)

Rupert A.C. Croft et al., Large-scale clustering of Lyman α emission intensity from SDSS/BOSSMNRAS 457, 3541 (2016)

M. Ozbek, R.A.C. Croft, N. Khandai, Large-scale 3D mapping of the intergalactic medium using the Lyman α forestMNRAS 456, 3510 (2016)

Nishikanta Khandai et al., The MassiveBlack-II simulation: the evolution of haloes and galaxies to z~0MNRAS 450, 1349 (2015)

Yu Feng et al., The formation of Milky Way–mass disk galaxies in the first 500 million years of a cold dark matter universeAstrophys. J. 808, 1 (2015)

Nathalie Palanque-Delabrouille et al., The one-dimensional Ly α forest power spectrum from BOSSA&A 559, A85 (2013)

Yu Feng et al., Terapixel imaging of cosmological simulationsAstrophys. J. Supp. 197, 18 (2011)

Rupert A.C. Croft et al., Galaxy morphology, kinematics and clustering in a hydrodynamic simulation of a Λ cold dark matter universeMNRAS 400, 43 (2009)

Rupert A.C. Croft et al., Toward a Precise Measurement of Matter Clustering: Lyα Forest Data at Redshifts 2–4Astrophys. J. 581, 20 (2002)

Rupert A.C. Croft et al., Recovery of the Power Spectrum of Mass Fluctuations from Observations of the Lyα ForestAstrophys. J. 495, 44 (1998)

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ORCID  Researcher ID