Associate Professor, Physics
EducationD. Phil., Oxford University
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.
- Y. Feng, R. A. C. Croft, T. D. Matteo, N. Khandai, Growth and anisotropy of ionization fronts near high-redshift quasars in the MassiveBlack simulation, Monthly Notices of the Royal Astronomical Society 429, 1554 (2013)
- Rupert A. C. Croft, Tiziana Di Matteo, Nishikanta Khandai, Volker Springel, Anirban Jana, Jeffrey P. Gardner, Dark matter halo occupation: environment and clustering, Monthly Notices of the Royal Astronomical Society 425, 2766 (2012)
- Yu Feng et al., Terapixel imaging of cosmological simulations, The Astrophysical Journal Supplement Series 197, 18 (2011)
- T. Di Matteo, N. Khandai, C. DeGraf, Y. Feng, R. A. C. Croft, J. Lopez, V. Springel, Cold flows and the first quasars, The Astrophysical Journal 745, L29 (2012)
- Rupert A. C. Croft, Tiziana Di Matteo, Volker Springel, Lars Hernquist, Galaxy morphology, kinematics and clustering in a hydrodynamic simulation of a Λ cold dark matter universe, Monthly Notices of the Royal Astronomical Society 400, 43 (2009)
- Rupert A. C. Croft, Ionizing Radiation Fluctuations and Large‐Scale Structure in the Lyα Forest, The Astrophysical Journal 610, 642 (2004)
- Rupert A. C. Croft, David H. Weinberg, Mike Bolte, Scott Burles, Lars Hernquist, Neal Katz, David Kirkman, David Tytler, Toward a Precise Measurement of Matter Clustering: Lyα Forest Data at Redshifts 2–4, The Astrophysical Journal 581, 20 (2002)
- Rupert A. C. Croft, Christopher A. Metzler, Weak‐Lensing Surveys and the Intrinsic Correlation of Galaxy Ellipticities, The Astrophysical Journal 545, 561 (2000)
- Rupert A. C. Croft, David H. Weinberg, Neal Katz, Lars Hernquist, Recovery of the Power Spectrum of Mass Fluctuations from Observations of the Lyα Forest, The Astrophysical Journal 495, 44 (1998)