AEOS: Star-by-Star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation

Kavli Affiliate: Anna Frebel | First 5 Authors: Kaley Brauer, Andrew Emerick, Jennifer Mead, Alexander P. Ji, John H. Wise | Summary: The AEOS project introduces a series of high-resolution cosmological simulations that model star-by-star chemical enrichment and galaxy formation in the early Universe, achieving 1 pc resolution. These simulations capture the complexities of galaxy […]


Continue.. AEOS: Star-by-Star Cosmological Simulations of Early Chemical Enrichment and Galaxy Formation

Correcting for Selection Biases in the Determination of the Hubble Constant from Time-Delay Cosmography

Kavli Affiliate: Philip J. Marshall | First 5 Authors: Tian Li, Thomas E. Collett, Philip J. Marshall, Sydney Erickson, Wolfgang Enzi | Summary: The time delay between multiple images of strongly lensed quasars has been used to infer the Hubble constant. The primary systematic uncertainty for time-delay cosmography is the mass-sheet transform (MST), which preserves […]


Continue.. Correcting for Selection Biases in the Determination of the Hubble Constant from Time-Delay Cosmography

Correcting for Selection Biases in the Determination of the Hubble Constant from Time-Delay Cosmography

Kavli Affiliate: Philip J. Marshall | First 5 Authors: Tian Li, Thomas E. Collett, Philip J. Marshall, Sydney Erickson, Wolfgang Enzi | Summary: The time delay between multiple images of strongly lensed quasars has been used to infer the Hubble constant. The primary systematic uncertainty for time-delay cosmography is the mass-sheet transform (MST), which preserves […]


Continue.. Correcting for Selection Biases in the Determination of the Hubble Constant from Time-Delay Cosmography

Correcting for Selection Biases in the Determination of the Hubble Constant from Time-Delay Cosmography

Kavli Affiliate: Philip Marshall | Summary:The time delay between multiple images of strongly lensed quasars has been used to infer the Hubble constant. The primary systematic uncertainty for time-delay cosmography is the mass-sheet transform (MST), which preserves the lensing observables while altering the inferred $H_0$. The TDCOSMO collaboration used velocity dispersion measurements of lensed quasars […]


Continue.. Correcting for Selection Biases in the Determination of the Hubble Constant from Time-Delay Cosmography

Domain-Adaptive Neural Posterior Estimation for Strong Gravitational Lens Analysis

Kavli Affiliate: Brian D. Nord | First 5 Authors: Paxson Swierc, Marcos Tamargo-Arizmendi, Aleksandra Ćiprijanović, Brian D. Nord, | Summary: Modeling strong gravitational lenses is prohibitively expensive for modern and next-generation cosmic survey data. Neural posterior estimation (NPE), a simulation-based inference (SBI) approach, has been studied as an avenue for efficient analysis of strong lensing […]


Continue.. Domain-Adaptive Neural Posterior Estimation for Strong Gravitational Lens Analysis

Improving Parallel Program Performance with LLM Optimizers via Agent-System Interface

Kavli Affiliate: Ke Wang | First 5 Authors: Anjiang Wei, Allen Nie, Thiago S. F. X. Teixeira, Rohan Yadav, Wonchan Lee | Summary: Modern scientific discovery increasingly relies on high-performance computing for complex modeling and simulation. A key challenge in improving parallel program performance is efficiently mapping tasks to processors and data to memory, a […]


Continue.. Improving Parallel Program Performance with LLM Optimizers via Agent-System Interface

Improving Parallel Program Performance with LLM Optimizers via Agent-System Interface

Kavli Affiliate: Ke Wang | First 5 Authors: Anjiang Wei, Allen Nie, Thiago S. F. X. Teixeira, Rohan Yadav, Wonchan Lee | Summary: Modern scientific discovery increasingly relies on high-performance computing for complex modeling and simulation. A key challenge in improving parallel program performance is efficiently mapping tasks to processors and data to memory, a […]


Continue.. Improving Parallel Program Performance with LLM Optimizers via Agent-System Interface

Improving Parallel Program Performance with LLM Optimizers via Agent-System Interfaces

Kavli Affiliate: Ke Wang | First 5 Authors: Anjiang Wei, Allen Nie, Thiago S. F. X. Teixeira, Rohan Yadav, Wonchan Lee | Summary: Modern scientific discovery increasingly relies on high-performance computing for complex modeling and simulation. A key challenge in improving parallel program performance is efficiently mapping tasks to processors and data to memory, a […]


Continue.. Improving Parallel Program Performance with LLM Optimizers via Agent-System Interfaces

A hybrid origin for the Martian atmosphere

Kavli Affiliate: Laura Schaefer | Summary:The Martian isotopic record displays a dichotomy in volatile compositions. Interior volatiles from the mantle record a chondritic heritage (e.g., H, N, Kr, Xe) whereas the atmospheric reservoir of Kr and Xe – which do not currently experience escape – record heritage from a solar-like source. Motivated by disparate inferences […]


Continue.. A hybrid origin for the Martian atmosphere

Early Bright Galaxies from Helium Enhancements in High-Redshift Star Clusters

Kavli Affiliate: Alexander P. Ji | First 5 Authors: Harley Katz, Alexander P. Ji, O. Grace Telford, Peter Senchyna, | Summary: The first few cycles of JWST have identified an overabundance of UV-bright galaxies and a general excess of UV luminosity density at $zgtrsim10$ compared to expectations from most (pre-JWST) theoretical models. Moreover, some of […]


Continue.. Early Bright Galaxies from Helium Enhancements in High-Redshift Star Clusters