The Kratos Framework for Heterogeneous Astrophysical Simulations: Ray Tracing, Reacting Flow and Thermochemistry

Posted by dbos Peking

Kavli Affiliate: Lile Wang | First 5 Authors: Lile Wang, , , , | Summary: Thermochemistry, ray-tracing radiation, and radiation-matter interactions are important processes which are computationally difficult to model in astrophysical simulations, addressed by introducing novel algorithms optimized for heterogeneous architectures in the Kratos framework. Key innovations include a stoichiometry-compatible reconstruction scheme for consistent […]


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Dynamic Vision Mamba

Posted by dbos UCAS

Kavli Affiliate: Zheng Zhu | First 5 Authors: Mengxuan Wu, Zekai Li, Zhiyuan Liang, Moyang Li, Xuanlei Zhao | Summary: Mamba-based vision models have gained extensive attention as a result of being computationally more efficient than attention-based models. However, spatial redundancy still exists in these models, represented by token and block redundancy. For token redundancy, […]


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Novel Polarimetric Analysis of Near Horizon Flaring Episodes in M87* in Millimeter Wavelength

Posted by dbos MIT

Kavli Affiliate: Mark Vogelsberger | First 5 Authors: Razieh Emami, Matthew Liska, Koushik Chatterjee, Geoffrey C. Bower, Wystan Benbow | Summary: Recent multi-wavelength observations of M87* citep{2024A&A…692A.140A} revealed a high-energy $gamma$-ray flare without a corresponding millimeter counterpart. We present a theoretical polarimetric study to evaluate the presence and nature of a potential millimeter flare in […]


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In vivo cell-type and brain region classification via multimodal contrastive learning

Posted by dbos Columbia

Kavli Affiliate: Liam Paninski | Authors: Han Yu, Hanrui Lyu, Ethan YiXun Xu, Charlie Windolf, Eric Kenji Lee, Fan Yang, Andrew M Shelton, Shawn Olsen, Sahar Minavi, Olivier Winter, The International Brain Laboratory, Eva L Dyer, Chandramouli Chandrasekaran, Nicholas A Steinmetz, Liam Paninski and Cole Hurwitz | Summary: Current electrophysiological approaches can track the activity […]


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Orbital-selective band modifications in a charge-ordered kagome metal LuNb$_6$Sn$_6$

Posted by dbos UCAS

Kavli Affiliate: Yi Zhou | First 5 Authors: Rui Lou, Yumeng Zhang, Erjian Cheng, Xiaolong Feng, Alexander Fedorov | Summary: The origin of the charge order in kagome lattice materials has attracted great interest due to the unique electronic structure features connected to kagome networks and the interplay between electron and lattice degrees of freedom. […]


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Identifying Instabilities with Quantum Geometry in Flat Band Systems

Posted by dbos UCSB

Kavli Affiliate: Leon Balents | First 5 Authors: Jia-Xin Zhang, Wen O. Wang, Leon Balents, Lucile Savary, | Summary: The absence of a well-defined Fermi surface in flat-band systems challenges the conventional understanding of instabilities toward Landau order based on nesting. We investigate the existence of an intrinsic nesting structure encoded in the band geometry […]


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Recursive Training Loops in LLMs: How training data properties modulate distribution shift in generated data?

Posted by dbos MIT

Kavli Affiliate: Peter Ford | First 5 Authors: Grgur Kovač, Jérémy Perez, Rémy Portelas, Peter Ford Dominey, Pierre-Yves Oudeyer | Summary: Large language models (LLMs) are increasingly contributing to the creation of content on the Internet. This creates a feedback loop as subsequent generations of models will be trained on this generated, synthetic data. This […]


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TDCOSMO XVII. New time delays in 22 lensed quasars from optical monitoring with the ESO-VST 2.6m and MPG 2.2m telescopes

Posted by dbos Cambridge

Kavli Affiliate: R. G. McMahon | First 5 Authors: Frédéric Dux, Martin Millon, Aymeric Galan, Eric Paic, Cameron Lemon | Summary: We present new time delays, the main ingredient of time delay cosmography, for 22 lensed quasars resulting from high-cadence r-band monitoring on the 2.6 m ESO VLT Survey Telescope and Max-Planck-Gesellschaft 2.2 m telescope. […]


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Enhancing Compton telescope imaging with maximum a posteriori estimation: a modified Richardson-Lucy algorithm for the Compton Spectrometer and Imager

Posted by dbos Tokyo

Kavli Affiliate: Shigeki Matsumoto | First 5 Authors: Hiroki Yoneda, Thomas Siegert, Israel Martinez-Castellanos, Savitri Gallego, Chris Karwin | Summary: We present a modified Richardson-Lucy (RL) algorithm tailored for image reconstruction in MeV gamma-ray observations, focusing on its application to the upcoming Compton Spectrometer and Imager (COSI) mission. Our method addresses key challenges in MeV […]


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Deciphering the Nature of Virgil: An Obscured AGN Lurking Within an Apparently Normal Lyman-α Emitter During Cosmic Reionization

Posted by dbos Cambridge

Kavli Affiliate: Roberto Maiolino | First 5 Authors: Pierluigi Rinaldi, Pablo G. Pérez-González, George H. Rieke, Jianwei Lyu, Francesco D’Eugenio | Summary: We present a comprehensive analysis of the MIRI Extremely Red Object Virgil, a Lyman-$alpha$ emitter at $z_{spec} = 6.6379 pm 0.0035$ with the photometric properties of a Little Red Dot. Leveraging new JWST/MIRI […]


Continue.. Deciphering the Nature of Virgil: An Obscured AGN Lurking Within an Apparently Normal Lyman-α Emitter During Cosmic Reionization