Results 1 to 10 of about 12,959,304 (254)

Six Maxims of Statistical Acumen for Astronomical Data Analysis [PDF]

The Astrophysical Journal Supplement Series
The acquisition of complex astronomical data is accelerating, especially with newer telescopes producing ever more large-scale surveys. The increased quantity, complexity, and variety of astronomical data demand a parallel increase in skill and ...
Hyungsuk Tak, Yang Chen, Vinay L. Kashyap, Kaisey S. Mandel, Xiao-Li Meng, Aneta Siemiginowska, David A. van Dyk   +6 more
doaj   +5 more sources

Fast Catalog Matching for Improved Posteriors via Constrained Clustering

The Astronomical Journal
We propose a novel approximate method for the probabilistic catalog matching problem that provides better solutions than previously used heuristics and scales well for large real-world applications.
Jacob Feitelberg, Tamás Budavári, Amitabh Basu   +2 more
doaj   +1 more source

Bayesian Estimation of Past Astronomical Frequencies, Lunar Distance, and Length of Day From Sediment Cycles

Geochemistry, Geophysics, Geosystems
Astronomical cycles recorded in stratigraphic sequences offer a powerful data source to estimate Earth's axial precession frequency k, as well as the frequency of rotation of the planetary perihelia (gi) and of the ascending nodes of their orbital planes
A. Malinverno, S. R. Meyers
doaj   +1 more source

Astronomical Chronology Framework of the Lingshui Formation (Oligocene) in the Northern South China Sea

Journal of Marine Science and Engineering
This study has determined the period of sedimentation of the Lingshui Formation as the Oligocene (Rupelian-Chattian) through biostratigraphic data, including planktonic foraminifera zonation.
Jianhao Liang, Yaning Wang, Shangfeng Zhang, Yubing Liang, Gaoyang Gong, Rui Han   +5 more
doaj   +1 more source

High-resolution Solar Image Registration Using Unsupervised Deep Learning

The Astrophysical Journal
High-resolution solar images captured at different wavelengths are essential for understanding solar activity. However, such images often exhibit geometric discrepancies due to varying instrument resolutions and observation conditions, making image ...
Hao Zhang, Bo Liang, Xiaoli Yan, Song Feng, Ding Yuan, Yunfang Cai, Wei Dai   +6 more
doaj   +1 more source

A Fast, Second-order Accurate Poisson Solver in Spherical Polar Coordinates

The Astrophysical Journal Supplement Series
We present an efficient and accurate algorithm for solving the Poisson equation in spherical polar coordinates with a logarithmic radial grid and open boundary conditions.
Jeonghyeon Ahn, Woong-Tae Kim, Yonghwi Kim   +2 more
doaj   +1 more source

A Fast Spectral-multigrid Poisson Solver in Non-Cartesian Geometries

The Astrophysical Journal Supplement Series
Accurate and efficient computation of self-gravity is essential in astrophysical fluid dynamics, particularly in spherical and cylindrical geometries where large radial dynamic ranges and nonaxisymmetric structures frequently arise.
Ankush Mandal, Oliver Gressel, Udo Ziegler, Andrea Mignone   +3 more
doaj   +1 more source

Efficient Exoplanet Imaging Simulations of the Habitable Worlds Observatory

The Astronomical Journal
Direct imaging simulations of starshades and other proposed mission concepts are needed to characterize planet detection performance and inform mission design trades.
Jamila S. Taaki, Farzad Kamalabadi, Athol J. Kemball, Lia Corrales, Alfred O. Hero III   +4 more
doaj   +1 more source

Investigations of MWISP Filaments. I. Filament Identification and Analysis Algorithms, and Source Catalog

The Astrophysical Journal Supplement Series
Filaments play a crucial role in providing the necessary environmental conditions for star formation, actively participating in the process. To facilitate the identification and analysis of filaments, we introduce Directional and Positional Consistency ...
Yu Jiang, Xuepeng Chen, Sheng Zheng, Zhibo Jiang, Zhiwei Chen, Yao Huang, Yang Su, Li Sun, Jian-Cheng Feng, Haoran Feng, Ji Yang   +10 more
doaj   +1 more source

Looking up to Look Within: Preliminary Findings of the Restorative Effects of Astronomical Retreats in South Africa. [PDF]

Int J Environ Res Public Health
Vertue DG, Thomas N, Fish T, Takalana C, Govender K, Macfarlane SA, Hendricks L.   +6 more
europepmc   +1 more source