Cosmology Summer Fest 2025

23 Jul 2025, 08:00 → 25 Jul 2025, 14:00 America/New_York

272 Bloomberg Center for Physics and Astronomy (Johns Hopkins University)

The 2025 Cosmology Summer Fest is in honor of Marc Kamionkowski and Robert Caldwell’s 60th birthdays. The event will be a 2.5-day science workshop during which we will discuss recent progress in a range of topics in theoretical and data-driven cosmology.

This event includes a reception on Wednesday evening 18:00-20:00 and a banquet dinner on Thursday 18:00-21:00, for registered participants, in the Atrium of the Bloomberg Center for Physics and Astronomy.

Link to suggested questions for Marc and Robert during Thursday's discussion.

Confirmed invited speakers:

Bruce Allen (Albert Einstein Institute)
Kimberly Boddy (University of Texas at Austin)
Latham Boyle (University of Edinburgh)
Sean Carroll (Johns Hopkins University)
Xuelei Chen (National Astronomical Observatories, Chinese Academy of Sciences)
Jens Chluba (Manchester University)
Cyril Creque-Sarbinowski (Center for Computational Astrophysics, Flatiron Institute)
Liang Dai (University of California, Berkeley)
Cora Dvorkin (Harvard University)
Chris Hirata (Ohio State University)
Dragan Huterer (University of Michigan)
Donghui Jeong (Penn State University)
Julian Munoz (University of Texas at Austin)
Lyman Page (Princeton University)
Hiranya Peiris (University of Cambridge)
Annika Peter (Ohio State University)
Vivian Poulin (LUPM, CNRS & Université de Montpellier)
Anthony Pullen (New York University)
Adam Riess (Johns Hopkins University)
Gabriela Sato-Polito (Institute of Advanced Study)
Joseph Silk (Johns Hopkins University)
Suzanne Staggs (Princeton University)
Avery Tishue (University of Illinois, Urbana-Champagne)

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Wednesday 23 July

08:30 → 09:00 Registration

09:00 → 09:15 Opening remarks

Speaker: Dan and Tristan

09:15 → 10:30 Gravitational Waves: Session 1

Convener: Emanuele Berti

09:15 Gravitational wave detection with pulsar timing arrays

Speaker: Bruce Allen (Max Planck Institute for Gravitational Physics)

09:45 Where are the supermassive black holes measured by PTAs?

Speaker: Gabriela Sato-Polito (Institute for Advanced Study)

10:15 Studying Binary Black Holes and the Universe with Gravitational Waves

Speaker: Michael Kesden (University of Texas at Dallas)

11:00 → 11:30 Coffee break

11:30 → 13:00 Num+AI: Session 2

Convener: Adrienne Erickcek

11:30 G & C and the Rest of the CMB

Speaker: Suzanne Staggs (Princeton University)

12:00 Surfing the Big Data Wave

Speaker: Hiranya Peiris (University of Cambridge)

12:30 Beyond the power spectrum: Physicists vs. AI

Speaker: Bhuvnesh Jain (University of Pennsylvania)

12:45 Rapid numerical evolution of linear cosmological perturbations with non-cold relics

Speaker: Nanoom Lee (Johns Hopkins University)

13:00 → 14:00 Lunch

14:00 → 15:45 Dark Energy / Inflation: Session 3

Convener: Daniel Grin

14:00 Complexogenesis

Speaker: Sean Carroll (Johns Hopkins University)

14:30 The Big Bang as a Mirror

Speaker: Latham Boyle (Higgs Centre for Theoretical Physics, University of Edinburgh)

15:00 Efficient Evolution of Spherical Dark-Matter Halos: With or Without New Physics

Speaker: Kris Sigurdson (University of British Columbia)

15:15 Beyond the Limits of Quintessence

Speaker: Eric Linder (UC Berkeley)

15:30 Large Scale White Noise Limits on Gravitational Radiation

Speaker: Albert Stebbins (Fermilab)

15:45 → 16:15 Coffee break

16:15 → 18:00 LIM+: Session 4

Convener: Jens Chluba (University of Manchester)

16:15 New Probes of Cosmic Noon with Line Intensity Mapping

Speaker: Anthony Pullen (New York University)

16:45 Galaxies for cosmology and cosmology for galaxies

Speaker: Julian Munoz (University of Texas at Austin)

17:15 A New Boundary Condition on Reionization

Speaker: Ely Kovetz (Ben-Gurion University)

17:30 High-Redshift Astrophysics Using Every Photon

Speaker: Patrick Breysse (Southern Methodist University)

17:45 Dim and Deserted: What Low Density Structures Tell Us About the Cosmology of the Universe

Speaker: Lara Arielle Phillips (University of Notre Dame)

18:00 → 20:00 Reception

Thursday 24 July

08:30 → 10:30 Dark Matter: Session 1

Convener: Tristan Smith (Swarthmore College)

08:30 The Universe as a Lab for Fundamental Physics

Speaker: Cora Dvorkin (Harvard University)

09:00 Cosmology of light dark matter

Speaker: Vera Gluscevic (University of Southern California)

09:30 Cosmology of even lighter dark matter

Speaker: Kimberly Boddy (University of Texas at Austin)

10:00 Exact treatment of weak dark matter-baryon scattering for linear-cosmology observables

Speaker: Yacine Ali-Haimoud (New York University)

10:15 Small-scale probes of the expansion history

Speaker: Adrienne Erickcek (UNC Chapel Hill)

10:30 → 11:00 Coffee break

11:00 → 12:45 CMB: Session 2

Convener: Vera Gluscevic (University of Southern California)

11:00 From Lagrangian to Likelihood: Dark Matter Physics with Big Telescopes and Computers

Speaker: Annika Peter (Ohio State University)

11:30 A new laboratory search for axions

Speaker: Lyman Page (Princeton University)

12:00 Fundamental science with the secondary CMB

Speaker: Matthew Johnson (York University/Perimeter Institute)

12:15 Fundamental Physics with kSZ Tomography

Speaker: Avery Tishue (University of Illinois Urbana-Champaign)

12:30 Acoustic phase-shift - a novel probe of neutrino interactions in cosmology

Speaker: Subhajit Ghosh (The University of Texas at Austin)

12:45 → 14:00 Lunch

14:00 → 16:00 Tensions: Session 3

Convener: Yacine Ali-Haimoud (New York University)

14:00 The Hubble Tension After JWST

Speaker: Adam Riess (Johns Hopkins University)

14:30 Early Dark Energy and the Hubble tension

Speaker: Vivian Poulin (LUPM, CNRS & U. de Montpellier, France)

15:00 Phantom dark energy 22 years later

Speaker: Dragan Huterer (University of Michigan)

15:30 DESI's neutrino mass constraints from a Bayesian & frequentist's perspective

Speaker: Laura Herold (Johns Hopkins University)

15:45 An S8 Tension at Redshift 2

Speaker: Simeon Bird (University of California, Riverside)

16:00 → 16:30 Coffee break

16:30 → 18:00 Special / Discussion: Session 4

Convener: Alvise Raccanelli (Universita e INFN, Padova (IT))

16:30 Hawking radiation and primordial black holes

Speaker: Christopher Hirata (Ohio State University)

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17:00 Long-range dark fifth-forces

Speaker: Cyril Creque-Sarbinowski (Center for Computational Astrophysics, Flatiron Institute)

17:15 Discussion

Speaker: Marc and Robert

18:00 → 21:00 Banquet dinner

Friday 25 July

09:00 → 10:30 Transients: Session 1

Convener: Simeon Bird

09:00 Probing the cosmic dark ages with the Hongmeng project

Speaker: Xuelei Chen (National Astronomical Observatories, Chinese Academy of Science)

09:30 Clustering fossil and parity violation measurement

Speaker: Donghui Jeong (The Pennsylvania State University)

09:45 Clustering in Plato’s cave

Speaker: Alvise Raccanelli (Universita e INFN, Padova (IT))

10:00 Not-Quite Primordial Black Holes

Speaker: Wenzer Qin (New York University)

10:15 Widen the Resonance: Probing a New Regime of Neutrino Self-Interactions with Cosmological Neutrinos

Speaker: Bei Zhou (Fermilab)

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10:30 → 11:00 Coffee break

11:00 → 13:00 Future: Session 2

Convener: Kimberly Boddy (University of Texas at Austin)

11:00 Dark Matter: the odds have changed

Speaker: Joe Silk (JHU/IAP)

11:30 New Cosmology Probes with Radio Polarimetry of Galaxies

Speaker: Liang Dai (University of California, Berkeley)

12:00 TBD

Speaker: Olivier Dore (JPL)

12:30 Quo Vadis CMB spectral distortions?

Speaker: Jens Chluba (University of Manchester)

13:00 → 14:00 Lunch