Format results
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Cosmology from Cross-Correlations: The Kinetic Sunyaev–Zel’dovich Effect & Galaxy Surveys
Neha Anil Kumar - Johns Hopkins University
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Modeling Galaxy Clusters for Cosmology
Camille Avestruz - University of Michigan–Ann Arbor
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Stress-testing LCDM model on small scales
Andrey Kravtsov - University of Chicago
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The infrared story of light scalars in de Sitter
Nadine Nussbaumer
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Efficient Evolution of Self-Gravitating Spherical Dark-Matter Halos with and without New Physics
Kris Sigurdson - University of British Columbia
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Real-Time Path Integrals, Caustics and Interference in Cosmology
Job Feldbrugge - Perimeter Institute for Theoretical Physics
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Axion-dilaton interactions in the dark sector
Adam Smith - University of Sheffield
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The emergence of galaxies in the first billion years: implications for reionization, cosmology and gravitational wave astronomy
Pratika Dayal - CITA
Galaxy formation in the first billion years marks a time of great upheaval in our cosmic history: the first sources of light in the Universe, these galaxies ended the 'cosmic dark ages' and produced the first photons that could break apart the hydrogen atoms suffusing all of space starting the… -
Trinity: the Dark Matter Halo—Galaxy—Supermassive Black Hole (SMBH) Connection from z=0-10
Haowen Zhang
Supermassive black holes (SMBHs) exist in many galaxies. Their growth is accompanied by strong energy output, which is capable of regulating host galaxy evolution. Understanding SMBH growth is thus critical for studying galaxy formation and evolution. However, it has been difficult to quantify SMBH… -
Cosmology from Cross-Correlations: The Kinetic Sunyaev–Zel’dovich Effect & Galaxy Surveys
Neha Anil Kumar - Johns Hopkins University
With increasingly precise measurements of the small-scale cosmic microwave background (CMB), the kinetic Sunyaev–Zel’dovich (kSZ) effect has emerged as a powerful probe of cosmology and astrophysics through cross-correlations with galaxy surveys. In this talk, I will review established applications… -
Unimodular Henneaux-Teitelboim (HT) Gravity: 4D and 2D applications
Unimodular Henneaux-Teitelboim (HT) Gravity provides a fully diffeomorphism-invariant route to unimodular gravity by promoting the cosmological constant to a conjugate variable with an associated “unimodular time”. I will present two complementary applications. In 4D minisuperspace, starting from… -
Neutron Stars as Laboratories for Physics Beyond the Standard Model
Anirudh Prabhu
Compact objects like neutron stars and black holes host extreme conditions that cannot be replicated in terrestrial laboratories or even by the most ambitious future particle colliders. These conditions make them unparalleled natural laboratories for exploring new physics. Neutron stars stand out… -
Modeling Galaxy Clusters for Cosmology
Camille Avestruz - University of Michigan–Ann Arbor
Galaxy clusters are visible across the electromagnetic spectrum. Observations of their structure, abundance, and evolution provide constraints to cosmology. We are in a golden age of statistical power for galaxy clusters, where observations will provide multiwavelength data for tens of thousands of… -
Stress-testing LCDM model on small scales
Andrey Kravtsov - University of Chicago
I will present a galaxy formation model within the Lambda Cold Dark Matter (LCDM) framework that is calibratedvon the results of galaxy formation simulations and some of the empirical properties of nearby dwarf galaxies. I will then use the model to interpret a number of ostensible challenges to the… -
The infrared story of light scalars in de Sitter
Nadine Nussbaumer
Perturbative calculations with light and polynomially self-interacting scalar fields in de Sitter spacetime are commonly plagued by infrared divergences as the scalar fluctuations become strongly coupled on large scales. Using techniques familiar from stochastic inflation, we treat super-Hubble… -
Efficient Evolution of Self-Gravitating Spherical Dark-Matter Halos with and without New Physics
Kris Sigurdson - University of British Columbia
We discuss NSphere, a new numerical algorithm for evolving spherically symmetric self-gravitating systems that reduces the six-dimensional phase space to three, providing orders-of-magnitude efficiency gains over full N-body methods. NSphere enables rapid exploration of halo evolution both in the… -
Cosmic acceleration through a new lens: synergies between galaxy surveys and the CMB
Anton Baleato Lizancos - UC Berkeley
Two puzzling periods of accelerated expansion are thought to bookend the timeline of our Universe: cosmic inflation in the beginning, and dark energy domination in recent times. New observations from experiments such as DESI and the Simons Observatory are enabling unprcedented insights into both of… -
Real-Time Path Integrals, Caustics and Interference in Cosmology
Job Feldbrugge - Perimeter Institute for Theoretical Physics
Interference is one of the most universal phenomena in nature, as exemplified by the real-time Feynman path integral. Despite the ubiquity of interference patterns, their evaluation has often proven challenging. This is especially apparent when considering lensing in astrophysics in the wave optics… -
Axion-dilaton interactions in the dark sector
Adam Smith - University of Sheffield
Axion-dilaton models provide a well-motivated, minimal class of models for which kinetic interactions between multiple scalar fields and their predictions can be explored, in particular in late time cosmology. I will review this class of models and present the formalism we developed for studying…