Astrophysics – Page 46 – Kavli Institute Pre-Print Publications

Extremely Dense Gas around Little Red Dots and High-redshift AGNs: A Non-stellar Origin of the Balmer Break and Absorption Features

Posted by dbos September 12, 2024Peking

Kavli Affiliate: Kohei Inayoshi | First 5 Authors: Kohei Inayoshi, Roberto Maiolino, , , | Summary: The James Webb Space Telescope (JWST) has uncovered low-luminosity active galactic nuclei (AGNs) at high redshifts of $zgtrsim 4-7$, powered by accreting black holes (BHs) with masses of $sim 10^{6-8}~M_odot$. These AGN populations are considered crucial for understanding early […]

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Enhancing Direct Detection of Higgsino Dark Matter

Posted by dbos September 12, 2024September 23, 2024Stanford

Kavli Affiliate: Peter W. Graham | First 5 Authors: Peter W. Graham, Harikrishnan Ramani, Samuel S. Y. Wong, , | Summary: While much supersymmetric WIMP parameter space has been ruled out, one remaining important candidate is Higgsino dark matter. The Higgsino can naturally realize the “inelastic dark matter" scenario, where the scattering off a nucleus […]

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Confirming the Tidal Tails of the Young Open Cluster Blanco 1 with TESS Rotation Periods

Posted by dbos September 11, 2024September 23, 2024MIT

Kavli Affiliate: Andrew M. Vanderburg | First 5 Authors: Lizhou Sha, Andrew M. Vanderburg, Luke G. Bouma, Chelsea X. Huang, | Summary: Blanco 1 is an $approx 130,mathrm{Myr}$ open cluster located 240 pc from the Sun below the Galactic plane. Recent studies have reported the existence of diffuse tidal tails extending 50-60 pc from the […]

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Low-energy critical behavior in two-dimensional tilted semi-Dirac semimetals driven by fermion-fermion interactions

Posted by dbos September 11, 2024September 23, 2024Peking

Kavli Affiliate: Jing Wang | First 5 Authors: Wen Liu, Wen-Hao Bian, Xiao-Zhuo Chu, Jing Wang, | Summary: Employing the renormalization group approach, we carefully investigate the critical behavior of two-dimensional tilted semi-Dirac semimetals induced by the fermion-fermion interactions in the low-energy regime. After incorporating all one-loop corrections, we derive the coupled RG equations of […]

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A Post-Starburst Pathway to Forming Massive Galaxies and Their Black Holes at z>6

Posted by dbos September 11, 2024September 23, 2024Tokyo

Kavli Affiliate: John D. Silverman | First 5 Authors: Masafusa Onoue, Xuheng Ding, John D. Silverman, Yoshiki Matsuoka, Takuma Izumi | Summary: Understanding the rapid formation of supermassive black holes (SMBHs) in the early universe requires an understanding of how stellar mass grows in the host galaxies. Here, we perform an analysis of rest-frame optical […]

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The K2 and TESS Synergy III: search and rescue of the lost ephemeris for K2’s first planet

Posted by dbos September 11, 2024MIT

Kavli Affiliate: Andrew Vanderburg | First 5 Authors: Erica Thygesen, Joseph E. Rodriguez, Zoë L. De Beurs, Andrew Vanderburg, John H. Livingston | Summary: K2-2 b/HIP 116454 b, the first exoplanet discovery by K2 during its Two-Wheeled Concept Engineering Test, is a sub-Neptune (2.5 $pm$ 0.1 $R_oplus$, 9.7 $pm$ 1.2 $M_oplus$) orbiting a relatively bright […]

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Improving Anomalous Sound Detection via Low-Rank Adaptation Fine-Tuning of Pre-Trained Audio Models

Posted by dbos September 11, 2024September 23, 2024Tokyo

Kavli Affiliate: Jia Liu | First 5 Authors: Xinhu Zheng, Anbai Jiang, Bing Han, Yanmin Qian, Pingyi Fan | Summary: Anomalous Sound Detection (ASD) has gained significant interest through the application of various Artificial Intelligence (AI) technologies in industrial settings. Though possessing great potential, ASD systems can hardly be readily deployed in real production sites […]

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The Blending ToolKit: A simulation framework for evaluation of galaxy detection and deblending

Posted by dbos September 11, 2024September 23, 2024Stanford

Kavli Affiliate: Patricia Burchat | First 5 Authors: Ismael Mendoza, Andrii Torchylo, Thomas Sainrat, Axel Guinot, Alexandre Boucaud | Summary: We present an open source Python library for simulating overlapping (i.e., blended) images of galaxies and performing self-consistent comparisons of detection and deblending algorithms based on a suite of metrics. The package, named Blending Toolkit […]

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The Blending ToolKit: A simulation framework for evaluation of galaxy detection and deblending

Posted by dbos September 11, 2024Stanford

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POEMMA-Balloon with Radio: a balloon-born multi-messenger multi-detector observatory

Posted by dbos September 10, 2024September 23, 2024Chicago

Kavli Affiliate: Angela Olinto | First 5 Authors: Matteo Battisti, Johannes Eser, Angela Olinto, Giuseppe Osteria, | Summary: The Probe Of Extreme Multi-Messenger Astrophysics (POEMMA) is a proposed dual-satellite mission to observe Ultra-High-Energy Cosmic Rays (UHECRs), increasing the statistics at the highest energies, and Very-High-Energy Neutrinos (VHENs), following multi-messenger alerts of astrophysical transient events throughout […]

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