Results 101 to 110 of about 28,044 (289)
The Astrophysical JournalStellar streams are one of the most promising tracers of low-mass dark-matter subhalos. Existing frameworks for modeling stream perturbations rely on restrictive assumptions for the Milky Way potential (e.g., static, axisymmetric) or are computationally ...
Jacob Nibauer +6 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Herein presented supraparticles combine the nanoparticulate photocatalyst graphitic carbon nitride with the enzyme horseradish peroxidase, which is immobilized on silica nanoparticles. In an optimized compatibility range, both catalysts operate effectively within the hybrid supraparticles and catalyze a cascade reaction consisting of the photocatalytic
Bettina Herbig +11 more
wiley +1 more source
Probing the Dark Matter Halos of External Galaxies with Stellar Streams
The Astrophysical JournalStellar streams have proven to be powerful tools for measuring the Milky Way’s gravitational potential and hence its dark matter (DM) halo. In the coming years, the Vera Rubin Observatory, Euclid, ARRAKIHS, and the Nancy Grace Roman Space Telescope will ...
Madison Walder +3 more
doaj +1 more source
High-velocity streams in the Milky Way halo with the SDSS and GSC-II kinematic survey
EPJ Web of Conferences, 2012 We explore the stellar halo of the Milky Way to search for fossil signatures of past mergers, consisting of streams of particles torn from their progenitors during the process of hierarchical merging.
Spagna A. +5 more
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An Upper Limit on the Granularity of the Local Stellar Halo
, 2003 I use the statistical properties of 4588 nearby halo stars to show that if the local stellar halo is composed of cold streams from disrupted dwarf satellites as is predicted by popular cosmologies, then at 95% confidence there are at least 1350 such ...
Gould, Andrew
core +2 more sources
Mapping stellar streams with LSST
, 2019 Large photometric surveys like SDSS and DES have shown that the Milky Way Galaxy is littered with stellar streams; the remnants of tidally disrupted star clusters and dwarf galaxies. However these surveys were limited to either the northern sky, or only a region of the southern sky.
openaire +1 more source
Advanced Functional Materials, EarlyView.This study investigates electromechanical PUFs that improve on traditional electric PUFs. The electron transport materials are coated randomly through selective ligand exchange. It produces multiple keys and a key with motion dependent on percolation and strain, and approaches almost ideal inter‐ and intra‐hamming distances.
Seungshin Lim +7 more
wiley +1 more source
A New Tidal Stream Discovered in Gaia DR3
The Astrophysical JournalThanks to the precise astrometric measurements of proper motions by the Gaia mission, a new tidal stellar stream has been discovered in the northern hemisphere. The distribution of star count shows that the stream is approximately 80° long and 1.°70 wide.
Hao Tian +4 more
doaj +1 more source
Discovery of Stellar Streams around NGC 3614
Research Notes of the AAS, 2021 Abstract In the course of surveying spiral galaxies in the Local Volume, long exposures of NGC 3416 show two probable stellar streams with the possible remnant of a satellite galaxy. I captured the discovery image using the Schulman Telescope at Steward Observatory's Mount Lemmon Sky Center (University of Arizona).
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Advanced Functional Materials, EarlyView.Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker +6 more
wiley +1 more source