Results 61 to 70 of about 8,852 (164)

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

WAsp: The Wideband (W) Adaptive-scale Pixel (Asp) Deconvolution Algorithm for Interferometric Imaging

The Astronomical Journal
This paper introduces the Wide-band Asp-Clean ( WAsp ) algorithm, a novel scale-sensitive image reconstruction method tailored for wide-band imaging applications.
M. Hsieh, S. Bhatnagar, U. Rau
doaj   +1 more source

Astronomical calibration of the middle Cambrian in Baltica: global carbon cycle synchronization and climate dynamics. [PDF]

Nat Commun
Jamart V, Pas D, Hinnov LA, Spangenberg JE, Adatte T, Nielsen AT, Schovsbo NH, Thibault N, Arts M, Daley AC.   +9 more
europepmc   +2 more sources

Attention-Enhanced GAN for Astronomical Image Restoration Under Atmospheric Turbulence and Optical Aberrations. [PDF]

Sensors (Basel)
Peng C, Li J, Bao J, Luo L.
europepmc   +1 more source

DIPLI: deep image prior lucky imaging for blind astronomical image restoration. [PDF]

Sci Rep
Singh S, Batsheva A, Rogov OY, Bouridane A.   +3 more
europepmc   +1 more source

Metasurface-enabled astronomical polarimetry. [PDF]

Sci Adv
Li LW, Oakley PHH, Schindhelm RN, Sellers SG, Casini R, Rubin NA.   +5 more
europepmc   +1 more source