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Ph.D., Astrophysics, University of Toronto, 2021

Research: Circumgalactic Medium and Warm-Hot Intergalactic Medium; Quasar Absorption Lines; X-ray and Sunyaev–Zeldovich Effect.

I work on field theoretic aspects of de Sitter (dS) space, and its relation to the physics of inflation.

In their new paper, Holz and first author Jose María Ezquiaga suggest that they can use our newfound knowledge about the whole population of black holes as a calibration tool.

Leah is a theoretical physicist whose research lies at the intersections of cosmology, gravitational physics and high-energy physics.

A Carnegie-led effort secured $205 million toward the completion of the next-generation Giant Magellan Telescope, which is currently being built at our Las Campanas Observatory in Chile. When completed, the GMT will enable breakthrough astronomy—from revealing the fundamental physics underpinning the cosmos to advancing our ability to search for life on distant worlds.

Abigail Vieregg, Professor in the Department of Physics, Astronomy & Astrophysics, and the EFI, has been appointed the David N. Schramm Director of the Kavli Institute for Cosmological Physics for a term beginning August 1, 2022 through July 31, 2025.

Graduate student Abby Lee has been awarded the Future Investigators in NASA Earth and Space Science and Technology (FINESST) grant

Congratulations to Taylor Hoyt for successfully defending his Ph.D. dissertation on “The Tip of the Red Giant Branch and its Application to Measurements of the Hubble Constant”.

Nebulas, galaxy clusters among first batch of images from James Webb Space Telescope, successor to Hubble

Congratulations to Dimitrios Tanoglidis for successfully defending his Ph.D. dissertation on “Shedding light on the Low-Surface-Brightness Universe with Galaxy Surveys and Machine Learning”.

Congratulations to Meng-Xiang Lin for successfully defending his Ph.D. dissertation on “Seeking Solutions for the Hubble Tension”.

The appointment of Joshua A. Frieman, Professor, as chair of the Department of Astronomy & Astrophysics, effective July 1, 2022 through June 30, 2025.

Congratulations to Rostom Mbarek for successfully defending his Ph.D. dissertation on “Particle Acceleration, Propagation, and Detection: A Journey from the Kinetic Structure of Plasma Physics to Particle Transport on Cosmic Scales”

Congratulations to Huanqing Chen for successfully defending her Ph.D. dissertation on “Probing Cosmic Reionization with Quasar Proximity Zones” (PhD Advisor: Nick Gnedin)