Astrophysics – Page 10 – Kavli Institute Pre-Print Publications

EIGER VII. The evolving relationship between galaxies and the intergalactic medium in the final stages of reionization

Posted by dbos June 3, 2025June 17, 2025MIT

Kavli Affiliate: Robert A. Simcoe | First 5 Authors: Daichi Kashino, Simon J. Lilly, Jorryt Matthee, Ruari Mackenzie, Anna-Christina Eilers | Summary: We present a comprehensive analysis of the relationship between galaxies and the intergalactic medium (IGM) during the late stages of cosmic reionization, based on the complete JWST EIGER dataset. Using deep NIRCam $3.5,mathrm{mu […]

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TDCOSMO 2025: Cosmological constraints from strong lensing time delays

Posted by dbos June 3, 2025June 17, 2025Chicago

Kavli Affiliate: Joshua A. Frieman | First 5 Authors: Simon Birrer, Elizabeth J. Buckley-Geer, Michele Cappellari, Frederic Courbin, Frederic Dux | Summary: We present cosmological constraints from 8 strongly lensed quasars (hereafter, the TDCOSMO-2025 sample). Building on previous work, our analysis incorporated new deflector stellar velocity dispersions measured from spectra obtained with the James Webb […]

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TDCOSMO 2025: Cosmological constraints from strong lensing time delays

Posted by dbos June 3, 2025June 17, 2025Chicago

Kavli Affiliate: Joshua A. Frieman | First 5 Authors: TDCOSMO Collaboration, Simon Birrer, Elizabeth J. Buckley-Geer, Michele Cappellari, Frédéric Courbin | Summary: We present cosmological constraints from 8 strongly lensed quasars (hereafter, the TDCOSMO-2025 sample). Building on previous work, our analysis incorporated new deflector stellar velocity dispersions measured from spectra obtained with the James Webb […]

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TDCOSMO 2025: Cosmological constraints from strong lensing time delays

Posted by June 3, 2025Chicago

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Verification of the Timing System for the X-ray Imaging and Spectroscopy Mission in the GPS Unsynchronized Mode

Posted by dbos June 3, 2025June 17, 2025MIT

Kavli Affiliate: Eric D. Miller | First 5 Authors: Megumi Shidatsu, Yukikatsu Terada, Takashi Kominato, So Kato, Ryohei Sato | Summary: We report the results from the ground and on-orbit verifications of the XRISM timing system when the satellite clock is not synchronized to the GPS time. In this case, the time is determined by […]

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NTIRE 2025 XGC Quality Assessment Challenge: Methods and Results

Posted by dbos June 3, 2025June 17, 2025Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Xiaohong Liu, Xiongkuo Min, Qiang Hu, Xiaoyun Zhang, Jie Guo | Summary: This paper reports on the NTIRE 2025 XGC Quality Assessment Challenge, which will be held in conjunction with the New Trends in Image Restoration and Enhancement Workshop (NTIRE) at CVPR 2025. This challenge is to […]

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Hierarchical Self-Prompting SAM: A Prompt-Free Medical Image Segmentation Framework

Posted by dbos June 3, 2025June 17, 2025Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Mengmeng Zhang, Xingyuan Dai, Yicheng Sun, Jing Wang, Yueyang Yao | Summary: Although the Segment Anything Model (SAM) is highly effective in natural image segmentation, it requires dependencies on prompts, which limits its applicability to medical imaging where manual prompts are often unavailable. Existing efforts to fine-tune […]

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Quantum Random Number Generator (QRNG): Theoretical and Experimental Investigations

Posted by dbos June 3, 2025Stanford

Kavli Affiliate: Zeeshan Ahmed | First 5 Authors: Zeshan Haider, Muhammad Haroon Saeed, Muhammad Ehsan-ul-Haq Zaheer, Zeeshan Ahmed Alvi, Muhammad Ilyas | Summary: Quantum Random Number Generators (QRNGs) emerged as a promising solution for generating truly random numbers. In the present article, we give an overview of QRNGs highlighting the merits and demerits of various […]

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The Relationship Between Eddington Ratio and Column Density in U/LIRG AGN

Posted by dbos June 2, 2025June 17, 2025Peking

Kavli Affiliate: Claudio Ricci | First 5 Authors: Jaya Nagarajan-Swenson, George C. Privon, Aaron S. Evans, Loreto Barcos-Muñoz, Claudio Ricci | Summary: The local X-ray AGN population appears to follow a growth cycle regulated by the AGN’s own radiation, marked by changes in their obscuration and Eddington ratio during accretion events. Because AGN in infrared-selected […]

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Low-velocity precessing jets can explain observed morphologies in the Twin Radio Galaxy TRG J104454+354055

Posted by dbos June 2, 2025Peking

Kavli Affiliate: Luis C. Ho | First 5 Authors: Santanu Mondal, Gourab Giri, Ravi Joshi, Paul J. Wiita, Gopal-Krishna | Summary: Our understanding of large-scale radio jets in merger systems has been drastically improved in the era of VLA, VLBA/EVN, uGMRT, and MeerKAT. Twin Radio Galaxies (TRGs) are the rare interacting galaxy pairs where both […]

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