Astrophysics – Page 8 – Kavli Institute Pre-Print Publications

Characterization of the Teledyne COSMOS Camera: A Large Format CMOS Image Sensor for Astronomy

Posted by dbos January 31, 2025February 10, 2025MIT

Kavli Affiliate: Gabor Furesz | First 5 Authors: Christopher Layden, Jill Juneau, Gustav Pettersson, Nathan Lourie, Benjamin Schneider | Summary: The Teledyne COSMOS-66 is a next-generation CMOS camera designed for astronomical imaging, featuring a large-format sensor ($8120 times 8120$ pixels, each $10 mu m$), high quantum efficiency, high frame rates, and a correlated multi-sampling mode […]

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A Spectroscopically Calibrated Prescription for Extracting PAH Flux from JWST MIRI Imaging

Posted by dbos January 31, 2025Peking

Kavli Affiliate: Claudio Ricci | First 5 Authors: Grant P. Donnelly, Thomas S. -Y. Lai, Lee Armus, Tanio Díaz-Santos, Kirsten L. Larson | Summary: We introduce a prescription for estimating the flux of the 7.7 micron and 11.3 micron polycyclic aromatic hydrocarbon (PAH) features from broadband JWST/MIRI images. Probing PAH flux with MIRI imaging data […]

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The Local Galactic Transient Survey Applied to an Optical Search for Directed Intelligence

Posted by dbos January 31, 2025February 10, 2025MIT

Kavli Affiliate: Michael McDonald | First 5 Authors: Alex Thomas, Natalie LeBaron, Luca Angeleri, Phillip Morgan, Varun Iyer | Summary: We discuss our transient search for directed energy systems in local galaxies, with calculations indicating the ability of modest searches to detect optical Search for Extraterrestrial Intelligence (SETI) sources in the closest galaxies. Our analysis […]

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The Local Galactic Transient Survey Applied to an Optical Search for Directed Intelligence

Posted by dbos January 31, 2025MIT

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TRIPP: A General Purpose Data Pipeline for Astronomical Image Processing

Posted by dbos January 30, 2025MIT

Kavli Affiliate: Michael McDonald | First 5 Authors: Alex Thomas, Natalie LeBaron, Luca Angeleri, Samuel Whitebook, Rachel Darlinger | Summary: We present the TRansient Image Processing Pipeline (TRIPP), a transient and variable source detection pipeline that employs both difference imaging and light curve analysis techniques for astronomical data. Additionally, we demonstrate TRIPP’s rapid analysis capability […]

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Better early than never: A new test for superluminal gravitational wave polarizations

Posted by dbos January 30, 2025February 10, 2025Chicago

Kavli Affiliate: Daniel E. Holz | First 5 Authors: Kristen Schumacher, Colm Talbot, Daniel E. Holz, Nicolás Yunes, | Summary: In some beyond-Einstein theories of gravity, gravitational waves can contain up to six polarizations, which are allowed to propagate at different speeds faster than light. These different propagation speeds imply that polarizations generated by the […]

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Segmentation-Aware Generative Reinforcement Network (GRN) for Tissue Layer Segmentation in 3-D Ultrasound Images for Chronic Low-back Pain (cLBP) Assessment

Posted by dbos January 29, 2025February 10, 2025Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Zixue Zeng, Xiaoyan Zhao, Matthew Cartier, Tong Yu, Jing Wang | Summary: We introduce a novel segmentation-aware joint training framework called generative reinforcement network (GRN) that integrates segmentation loss feedback to optimize both image generation and segmentation performance in a single stage. An image enhancement technique called […]

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Byzantine-Robust Federated Learning over Ring-All-Reduce Distributed Computing

Posted by dbos January 29, 2025February 10, 2025Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Minghong Fang, Zhuqing Liu, Xuecen Zhao, Jia Liu, | Summary: Federated learning (FL) has gained attention as a distributed learning paradigm for its data privacy benefits and accelerated convergence through parallel computation. Traditional FL relies on a server-client (SC) architecture, where a central server coordinates multiple clients […]

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Byzantine-Robust Federated Learning over Ring-All-Reduce Distributed Computing

Posted by dbos January 29, 2025Tokyo

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The impact of cosmic ray feedback during the epoch of reionisation

Posted by dbos January 28, 2025Cambridge

Kavli Affiliate: Martin Haehnelt | First 5 Authors: Marion Farcy, Joakim Rosdahl, Yohan Dubois, Jérémy Blaizot, Sergio Martin-Alvarez | Summary: Galaxies form and evolve via a multitude of complex physics. In this work, we investigate the role of cosmic ray (CR) feedback in galaxy evolution and reionisation, by examining its impact on the escape of […]

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