Results 41 to 50 of about 1,905,779 (165)

Construction of a Global Atmospheric Refractivity Model for Optical Wavelengths Based on Temporal Evolution Characteristics

Earth and Space Science, Volume 13, Issue 10, October 2026.
Abstract Atmospheric refractivity model accuracy is important for refraction correction, starlight refraction navigation, and related optoelectronic applications. To address the insufficient understanding of refractivity temporal evolution and the lack of clear criteria for selecting model temporal resolution, this study constructs a global four ...
Zhiyan Ding, Pengfei Wu, Wenyue Zhu
wiley   +1 more source

Unsupervised Machine Learning for Classifying CHIME Fast Radio Bursts and Investigating Empirical Relations

The Astrophysical Journal
Fast radio bursts (FRBs) are highly energetic millisecond-duration astrophysical phenomena typically categorized as repeaters or nonrepeaters. However, observational limitations may result in misclassifications, potentially leading to a higher proportion
Da-Chun Qiang, Jie Zheng, Zhi-Qiang You, Sheng Yang   +3 more
doaj   +1 more source

Research on High-Stability Composite Control Methods for Telescope Pointing Systems under Multiple Disturbances

Sensors
During the operation of space gravitational wave detectors, the constellation configuration formed by three satellites gradually deviates from the ideal 60° angle due to the periodic variations in orbits.
Rui Zhang, Kai Zhao, Sijun Fang, Wentong Fan, Hongwen Hai, Jian Luo, Bohong Li, Qicheng Sun, Jie Song, Yong Yan   +9 more
doaj   +1 more source

Determination of Earth's Static Gravity Field Using Quantum Gravity Satellites at Very Low Earth Orbit

Earth and Space Science, Volume 13, Issue 10, October 2026.
Abstract Very Low Earth Orbit (VLEO) satellite platforms and quantum‐optical sensing technologies may provide new observation approaches for improving Earth's static gravity field models. This study conceptually assesses their potential contribution through a two‐tier closed‐loop simulation framework.
Wenming Chen, Hao Zhou, Yanbin Zhao, Zhu Zhu, Shuyun Zheng, Zhicai Luo, Zebing Zhou   +6 more
wiley   +1 more source

LIGO, gravitational waves and the new astronomy (Free Astronomy Public Lectures)

, 2016
On September 14, 2015, gravitational waves from the merger of two black holes rippled through the Laser Interferometer Gravitational-wave Observatory (LIGO).
Eric Thrane
core   +1 more source

A Transdimensional Sampling Framework for Pulsar Timing Noise Modeling

The Astrophysical Journal
A careful characterisation of the noise processes in pulsar timing data is a prerequisite for pulsar timing array experiments. While single-pulsar noise analyses are crucial for both gravitational-wave searches and astrophysical studies, they are often ...
Valentina Di Marco, Nir Guttman, Matthew T. Miles, Andrew Zic, Ryan M. Shannon, Eric Thrane   +5 more
doaj   +1 more source

Flip‐Flop Detachments Require Moderate Strength Contrasts Between Fault Zone and Fault Blocks

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Large‐offset detachment faults frequently occur at slow‐ and ultraslow‐spreading mid‐ocean ridges, especially where magma supply is limited. Observations show that detachments at ultraslow ridges often alternate in polarity (“flip‐flop” regime), but the mechanical controls governing their formation remain poorly understood.
A. Demont, J.‐A. Olive, M. Cannat
wiley   +1 more source

Orbital Eccentricity in a Neutron Star–Black Hole Merger

The Astrophysical Journal Letters
The observation of gravitational waves (GWs) from merging black holes and neutron stars provides a unique opportunity to discern information about their astrophysical environment. Two signatures that are considered powerful tracers to distinguish between
Gonzalo Morras, Geraint Pratten, Patricia Schmidt   +2 more
doaj   +1 more source

Benchmarking Multiple Methods for the Spectral Analysis of Seafloor Morphology

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The influence of glacial sea‐level changes on the quasi‐periodic spacing of abyssal hills has remained controversial for over a decade. Spectral analyses of seafloor morphology have yielded contrasting conclusions regarding whether periodicities associated with orbital Milankovitch forcing are recorded in abyssal hill spacing, raising ...
B. Bauer, I. Grevemeyer, L. Rüpke, P. Huybers, A. Dannowski, M. Riedel, M. Frank, K. Hoernle, C. Langmuir, H. Kopp   +9 more
wiley   +1 more source

On-Ground Testing of Dual-Sided Release Mechanism of TianQin Test Mass Using a Pendulum

Sensors
The high-precision gravitational reference sensor, which hosts a heavy test mass (TM) surrounded by electrodes with a relatively large gap, is crucial in all high-sensitivity drag-free sensors.
Ji Wang, Diwen Shi, Chao Xue, Biao Yang, Bingwei Cai, Jie Chang, Zefan Zhou, Wenhai Tan, Shanqing Yang   +8 more
doaj   +1 more source