Results 21 to 30 of about 495 (89)

Lactea: Web‐Based Spectrum‐Preserving Multi‐Resolution Visualization of the GAIA Star Catalog

Computer Graphics Forum, Volume 44, Issue 3, June 2025.
Abstract The explosion of data in astronomy has resulted in an era of unprecedented opportunities for discovery. The GAIA mission's catalog, containing a large number of light sources (mostly stars) with several parameters such as sky position and proper motion, is playing a significant role in advancing astronomy research and has been crucial in ...
Reem Alghamdi, Markus Hadwiger, Guido Reina, Alberto Jaspe‐Villanueva   +3 more
wiley   +1 more source

Dark Energy From the Gravitational Wave Background With Scalar Field Dark Matter

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Recent observational results, such as those from pulsar timing arrays (PTA), suggest a low‐frequency Gravitational Wave Background (GWB) permeates our universe. This opens the possibility that gravitational waves could span a broader spectrum, potentially impacting cosmological scales.
Edwin L. Pérez‐Ochoa, Tonatiuh Matos
wiley   +1 more source

swPHoToNs: Toward trillion‐body‐scale cosmological N‐body simulations on Sunway TaihuLight supercomputer

Engineering Reports, Volume 7, Issue 3, March 2025.
We present the details of implementing a highly efficient and scalable Cosmological N‐body simulation framework on the heterogeneous many‐core supercomputer Sunway TaihuLight. We manage to conduct cosmological simulations which contain up to 1.6 trillion particles, obtaining a sustained performance of 56.3 PFlops with a weak‐scaling parallel efficiency
Zhao Liu, Qiao Wang, Xiaojing Lv, Xu Liu, Hongsong Meng, Guanghui Zhu, Liang Gao, Haohuan Fu, Guangwen Yang   +8 more
wiley   +1 more source

Searching the Non‐Accreting White Dwarf Population in eROSITA Data

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT eROSITA is the soft X‐ray instrument aboard the Spectrum Roentgen Gamma (SRG) satellite that is most sensitive in the energy range between 0.2 and 2.3 keV. Between December 2019 and December 2021, eROSITA completed four all‐sky surveys, producing all‐sky X‐ray source lists and sky maps of unprecedented depth.
S. Friedrich, C. Maitra, K. Dennerl, A. Schwope, K. Werner, B. Stelzer   +5 more
wiley   +1 more source

Chiral Emission from Optical Metasurfaces and Metacavities

Advanced Photonics Research, Volume 5, Issue 12, December 2024.
Chiral emission with near‐unity degree of circular polarization and strong emission intensities is highly desirable. This review discusses recent experimental demonstrations on chiral emission from achiral emitters that are combined with patterned nanostructures.
Jungho Han, Heejoo Jang, Yeonsoo Lim, Seongheon Kim, Jeheon Lee, Young Chul Jun   +5 more
wiley   +1 more source

Exploring Green Fluorescent Protein Brownian Motion: Temperature and Concentration Dependencies Through Luminescence Thermometry

Advanced Physics Research, Volume 3, Issue 11, November 2024.
This study explores Brownian motion in enhanced green fluorescent protein (EGFP) using luminescence nanothermometry. How protein concentration and temperature impact EGFP dynamics is demonstrated providing insights into protein behavior in crowded environments.
Yongwei Guo, Fernando E. Maturi, Carlos D. S. Brites, Luís D. Carlos   +3 more
wiley   +1 more source

Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +1 more source

Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

Small Structures, Volume 5, Issue 7, July 2024.
Cellulose nanocrystals are abundant, biodegradable nanoparticles that can self‐assemble into a helical stacking that exhibits structural color. By adding a single surfactant, cellulose nanocrystals can be made compatible with apolar solvents, which are widely used for industrial coatings.
Diogo V. Saraiva, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire, Lisa Tran   +4 more
wiley   +1 more source

Ultrasensitive and Visible Detection of Influenza A Virus Based on Enzymatic Properties of Layered Gold Nanoparticles

Small Structures, Volume 5, Issue 4, April 2024.
An ultrasensitive and visible detection for influenza A virus is presented by leveraging the properties of gold nanoparticles (GNPs). Dual amplification, achieved through a synthetic nanoprobe utilizing the enzymatic properties of layered GNPs, exhibits a higher sensitivity. This system is suitable for point‐of‐care tests within 55 min by verifying its
Eunji Jeong, Geunseon Park, Jinyoung Kim, Sojeong Lee, Chaewon Park, Jong‐Woo Lim, Minjoo Yeom, Daesub Song, Seungjoo Haam   +8 more
wiley   +1 more source

Possible nonstellar explanation for the unexpected brightness of the earliest galaxies observed by the James Webb Space Telescope. [PDF]

Sci Rep
Jacak JE.
europepmc   +1 more source