Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Moira Andrews, M. Celeste Artale, Ankit Kumar, Kyoung-Soo Lee, Tess Florek | Summary: We investigate the physical properties and redshift evolution of simulated galaxies residing in protoclusters at cosmic noon, to understand the influence of the environment on galaxy formation. This work is to build clear expectations […]
Kavli Affiliate: Ronald A. Remillard | First 5 Authors: Keith C. Gendreau, Dominic Maes, Ronald A. Remillard, Paul S. Ray, Zaven Arzoumanian | Summary: The Low Energy Modular Array (LEMA) is one of three instruments that compose the STROBE-X mission concept. The LEMA is a large effective-area, high throughput, non-imaging pointed instrument based on the […]
Kavli Affiliate: Deepto Chakrabarty | First 5 Authors: Paul S. Ray, Peter W. A. Roming, Andrea Argan, Zaven Arzoumanian, David R. Ballantyne | Summary: We give an overview of the science objectives and mission design of the Spectroscopic Time-Resolving Observatory for Broadband Energy X-rays (STROBE-X) observatory, which has been proposed as a NASA probe-class (~$1.5B) […]
Kavli Affiliate: Deepto Chakrabarty | First 5 Authors: Paul S. Ray, Peter W. A. Roming, Andrea Argan, Zaven Arzoumanian, David R. Ballantyne | Summary: We give an overview of the science objectives and mission design of the Spectroscopic Time-Resolving Observatory for Broadband Energy X-rays (STROBE-X) observatory, which has been proposed as a NASA probe-class (~$1.5B) […]
Kavli Affiliate: Max Tegmark | First 5 Authors: Anish Mudide, Joshua Engels, Eric J. Michaud, Max Tegmark, Christian Schroeder de Witt | Summary: Sparse autoencoders (SAEs) are a recent technique for decomposing neural network activations into human-interpretable features. However, in order for SAEs to identify all features represented in frontier models, it will be necessary […]
Kavli Affiliate: Max Tegmark | First 5 Authors: Yuxiao Li, Eric J. Michaud, David D. Baek, Joshua Engels, Xiaoqing Sun | Summary: Sparse autoencoders have recently produced dictionaries of high-dimensional vectors corresponding to the universe of concepts represented by large language models. We find that this concept universe has interesting structure at three levels: 1) […]
Kavli Affiliate: Sara Seager | First 5 Authors: Amélie Gressier, Ryan J. MacDonald, Néstor Espinoza, Hannah R. Wakeford, Nikole K. Lewis | Summary: We present the first emission spectrum of the hot Jupiter WASP-17 b using one eclipse observation from the JWST Near Infrared Imager and Slitless Spectrograph (NIRISS) Single Object Slitless Spectroscopy (SOSS) mode. […]
Kavli Affiliate: Sara Seager | First 5 Authors: Daniel Valentine, Hannah R. Wakeford, Ryan C. Challener, Natasha E. Batalha, Nikole K. Lewis | Summary: We present the first spectroscopic characterisation of the dayside atmosphere of WASP-17b in the mid-infrared using a single JWST MIRI/LRS eclipse observation. From forward-model fits to the 5-12 $mu$m emission spectrum, […]
Kavli Affiliate: Max Tegmark | First 5 Authors: David D. Baek, Yuxiao Li, Max Tegmark, , | Summary: Motivated by interpretability and reliability, we investigate how neural networks represent knowledge during graph learning, We find hints of universality, where equivalent representations are learned across a range of model sizes (from $10^2$ to $10^9$ parameters) and […]
Kavli Affiliate: Kiyoshi W. Masui | First 5 Authors: Kaitlyn Shin, Calvin Leung, Sunil Simha, Bridget C. Andersen, Emmanuel Fonseca | Summary: Fast radio bursts (FRBs) are unique probes of extragalactic ionized baryonic structure as each signal, through its burst properties, holds information about the ionized matter it encounters along its sightline. FRB 20200723B is […]