High-spectral-resolution Observations of the [S II] Emission-line Doublet in the Filamentary Nebula Surrounding NGC 1275

Posted by klaurent MIT

Kavli Affiliate: Michael McDonald | Summary:We analyze new high-spectral resolution SITELLE observations (R = $λ/Δλ$ = 7000) of the filamentary nebula surrounding NGC 1275, central galaxy of the Perseus cluster. We present here analysis of the sii$lambda6716$ and sii$lambda6731$ emission line doublet, using its ratio to determine the electron density of the optically emitting filaments. […]


Continue.. High-spectral-resolution Observations of the [S II] Emission-line Doublet in the Filamentary Nebula Surrounding NGC 1275

Enabling Quantitative Polarimetry for Keck/NIRC2: Preliminary Mueller Matrix Model Calibration

Posted by klaurent Caltech

Kavli Affiliate: Dimitri Mawet| Summary:The Keck/NIRC2 infrared imager was upgraded in 2025 with dual-beam polarimetric observing modes spanning approximately 1.1–4.1 microns (JHKL’ bands). We present a preliminary JHK calibration of NIRC2 Polarimetry using a wavelength-dependent Mueller matrix model of the Keck tertiary mirror (M3), half-wave plate (HWP), image rotator (IMR), downstream optics, and Wollaston prism. […]


Continue.. Enabling Quantitative Polarimetry for Keck/NIRC2: Preliminary Mueller Matrix Model Calibration

scFair: Geometry-Aware Gene Budgets and Same-Rank Extension for Highly Variable Gene Selection

Posted by dbos Rockefeller

Kavli Affiliate: Li Zhao | Authors: Zhao Li, Aaron James and Shengxuan Li | Summary: Background Highly variable gene (HVG) selection begins almost every single-cell RNA-seq analysis. While ranking formulas have been compared extensively, the integer gene budget at which any ranking must be truncated is typically left to the user and habitually fixed near 2,000. […]


Continue.. scFair: Geometry-Aware Gene Budgets and Same-Rank Extension for Highly Variable Gene Selection

Chromosome-level genome assembly of the European leaf-toed gecko, Euleptes europaea

Posted by dbos Rockefeller

Kavli Affiliate: Erich Jarvis | Authors: Josephine R Paris, Linelle Abueg, Sarah Pelan, Ying Sims, Tatiana Tilley, Jacquelyn Mountcastle, Jennifer Balacco, Brian O’Toole, Olivier Fedrigo, Giulio Formenti, Erich D Jarvis, Daniele Canestrelli and Daniele Salvi | Summary: The European leaf-toed gecko (Euleptes europaea) is a small, nocturnal gecko endemic to the western Mediterranean. As a […]


Continue.. Chromosome-level genome assembly of the European leaf-toed gecko, Euleptes europaea

Phylogeny of cortical-hippocampal projections reveals selective elimination of input from sensory regions

Posted by dbos NTNU

Kavli Affiliate: Menno Witter | Authors: Daniel Reznik, Piotr Majka, Marcello GP Rosa, Menno P Witter and Christian F Doeller | Summary: The study of cross-species differences in the organization of the cerebral cortex received significant attention during the past century. However, the evolutionary principles governing changes in brain connectivity and their impact on cognition […]


Continue.. Phylogeny of cortical-hippocampal projections reveals selective elimination of input from sensory regions

Rollplex: Cross-Phase GPU Spatial Sharing for Vision Language Model Post-Training

Posted by klaurent Caltech

Kavli Affiliate: Wei Gao| Summary:Vision-language models (VLMs) enable embodied agents to reason and act from visual observations and language instructions. Reinforcement learning (RL) post-training enhances these capabilities using task feedback, but current on-policy RL runtimes execute rollout, reference scoring, and actor training in strict serial phases. While effective for text-only RL, this phase-granular execution is […]


Continue.. Rollplex: Cross-Phase GPU Spatial Sharing for Vision Language Model Post-Training

XRISM reveals sloshing-driven gas motions in the core of Abell 2029

Posted by klaurent MIT

Kavli Affiliate: Eric Miller | Summary:We investigate the velocity structure of the intracluster medium (ICM) in the core of the relaxed cool-core cluster Abell 2029 using XRISM Resolve spectroscopy. We analyze combined XRISM Resolve observations and divide the central region into several subregions. To account for photon mixing caused by the XRISM point spread function, […]


Continue.. XRISM reveals sloshing-driven gas motions in the core of Abell 2029

The Evolution of the ACIS Contamination Layer on the Chandra X-ray Observatory from 2010 to 2026

Posted by klaurent MIT

Kavli Affiliate: Herman Marshall | Summary:The Chandra X-ray Observatory (CXO) was launched over 27 years ago and has been delivering spectacular science over the course of its mission. The Advanced CCD Imaging Spectrometer (ACIS) is the prime instrument on the satellite, conducting over 90% of the observations. The CCDs operate at a temperature of $-$120$^circ$C […]


Continue.. The Evolution of the ACIS Contamination Layer on the Chandra X-ray Observatory from 2010 to 2026

CoDS: Robust Collaborative Perception via Expert-driven Detection and BEV Segmentation

Posted by klaurent Caltech

Kavli Affiliate: Wei Gao| Summary:Collaborative perception breaks through single-view limitations via multi-agent information exchange. However, multi-source noise such as pose errors and communication delays degrades fusion feature quality, constraining perception performance. Joint training of detection and BEV segmentation provides a natural remedy, where segmented road regions help constrain target distributions and detection bounding boxes help […]


Continue.. CoDS: Robust Collaborative Perception via Expert-driven Detection and BEV Segmentation

Energy Partitioning in Dust-catalyzed $mathrmH_2$ and HD Formation Revealed by Molecular Simulations Considering Nuclear Quantum Effects

Posted by klaurent Peking

Kavli Affiliate: Lile Wang |Summary:Molecular hydrogen formation on interstellar dust grains is a key surface process in the interstellar medium, but the redistribution of the recombination energy between the substrate and the nascent molecule remains poorly understood. Here, we use ring-polymer molecular dynamics (RPMD) with a machine-learning force field to investigate energy partitioning during $mathrmH_2$ […]


Continue.. Energy Partitioning in Dust-catalyzed $mathrmH_2$ and HD Formation Revealed by Molecular Simulations Considering Nuclear Quantum Effects