October 2024 – Page 4 – Kavli Institute Pre-Print Publications

The NuSTAR Local AGN $N_{rm H}$ Distribution Survey (NuLANDS) I: Towards a Truly Representative Column Density Distribution in the Local Universe

Posted by dbos October 9, 2024October 14, 2024Peking, This Week: Astrophysics

Kavli Affiliate: Claudio Ricci | First 5 Authors: Peter G. Boorman, Poshak Gandhi, Johannes Buchner, Daniel Stern, Claudio Ricci | Summary: Hard X-ray-selected samples of Active Galactic Nuclei (AGN) provide one of the cleanest views of supermassive black hole accretion, but are biased against objects obscured by Compton-thick gas column densities of $N_{rm H}$ $>$ […]

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Constraints on Long-Ranged Interactions Between Dark Matter and the Standard Model

Posted by dbos October 9, 2024October 14, 2024Stanford, This Week: Astrophysics

Kavli Affiliate: Peter Graham | First 5 Authors: Zachary Bogorad, Peter Graham, Harikrishnan Ramani, , | Summary: Dark matter’s existence is known thanks to its gravitational interaction with Standard Model particles, but it remains unknown whether this is the only force present between them. While many searches for such new interactions with dark matter focus […]

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Investigating the sightline of a highly scattered FRB through a filamentary structure in the local Universe

Posted by dbos October 9, 2024October 14, 2024MIT, This Week: Astrophysics

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 […]

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Systematic collapse of the accretion disc in AGN confirmed by UV photometry and broad line spectra

Posted by dbos October 9, 2024October 14, 2024This Week: Astrophysics, Tokyo

Kavli Affiliate: John D. Silverman | First 5 Authors: Jia-Lai Kang, Chris Done, Scott Hagen, Matthew J. Temple, John D. Silverman | Summary: A recent study on the spectral energy distribution (SED) of AGN combined unobscured X-ray sources from the eROSITA eFEDS Survey with high quality optical imaging from Subaru’s Hyper Suprime-Cam (HSC). The HSC […]

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Perceptual Quality Assessment of Octree-RAHT Encoded 3D Point Clouds

Posted by dbos October 9, 2024October 14, 2024Caltech, This Week: Nanoscience

Kavli Affiliate: Wei Gao | First 5 Authors: Dongshuai Duan, Honglei Su, Qi Liu, Hui Yuan, Wei Gao | Summary: No-reference bitstream-layer point cloud quality assessment (PCQA) can be deployed without full decoding at any network node to achieve real-time quality monitoring. In this work, we focus on the PCQA problem dedicated to Octree-RAHT encoding […]

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Perceptual Quality Assessment of Trisoup-Lifting Encoded 3D Point Clouds

Posted by dbos October 9, 2024October 14, 2024Caltech, This Week: Nanoscience

Kavli Affiliate: Wei Gao | First 5 Authors: Juncheng Long, Honglei Su, Qi Liu, Hui Yuan, Wei Gao | Summary: No-reference bitstream-layer point cloud quality assessment (PCQA) can be deployed without full decoding at any network node to achieve real-time quality monitoring. In this work, we develop the first PCQA model dedicated to Trisoup-Lifting encoded […]

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Tracking the jet-like corona of black hole Swift J1727.8-1613 during a flare state through Type-C quasi-periodic oscillations

Posted by dbos October 9, 2024October 14, 2024Peking, This Week: Astrophysics

Kavli Affiliate: Luis C. Ho | First 5 Authors: Jie Liao, Ning Chang, Lang Cui, Pengfei Jiang, Didong Mou | Summary: Type-C quasi-periodic oscillations (QPOs) in black hole X-ray transients typically manifest in the low-hard and hard-intermediate states. This study presents a detailed spectral and temporal analysis of the black hole candidate Swift J1727.8-1613 using […]

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Ion-Assisted Nanoscale Material Engineering in Atomic Layers

Posted by dbos October 8, 2024October 14, 2024Berkeley, This Week: Nanoscience

Kavli Affiliate: Xiang Zhang | First 5 Authors: Hossein Taghinejad, Mohammad Taghinejad, Sajjad Abdollahramezani, Qitong Li, Eric V. Woods | Summary: Achieving deterministic control over the properties of low-dimensional materials with nanoscale precision is a long-sought goal. Mastering this capability has a transformative impact on the design of multifunctional electrical and optical devices. Here, we […]

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Interplay of Zeeman field, Rashba spin-orbit interaction, and superconductivity: Transition temperature and quasiparticle excitation

Posted by dbos October 8, 2024October 14, 2024This Week: Theoretical Physics, UCAS

Kavli Affiliate: Yi Zhou | First 5 Authors: Chen Pang, Yi Zhou, , , | Summary: This paper provides a theoretical analysis on the effects of an external Zeeman field and Rashba spin-orbit interactions on superconductivity. We have extensively studied their influence on the superconducting transition temperature $T_c$ and the quasiparticle excitation energy. Our investigation […]

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Highly Excited Electron Cyclotron for QCD Axion and Dark-Photon Detection

Posted by dbos October 7, 2024October 14, 2024Stanford, This Week: Astrophysics

Kavli Affiliate: Peter W. Graham | First 5 Authors: Xing Fan, Gerald Gabrielse, Peter W. Graham, Harikrishnan Ramani, Samuel S. Y. Wong | Summary: We propose using highly excited cyclotron states of a trapped electron to detect meV axion and dark photon dark matter, marking a significant improvement over our previous proposal and demonstration [Phys. […]

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