Results 51 to 60 of about 8,852 (164)

Fine-grained Morphological Study of Galaxy Pairs: A Human-in-the-loop Self-supervised Classification Framework

open access: yesThe Astronomical Journal
Galaxy pairs, as key probes for studying galaxy formation and evolution, provide a unique window for observing galaxy interactions, including the associated exchange of material and related galaxy formation activities.
Yating Li   +4 more
doaj   +1 more source

Method of Astronomical Design of Arctic Roads

open access: yesIOP Conference Series: Earth and Environmental Science, 2019
Abstract A method of designing roads, based on Arctic territories is described. Results of GPS-shooting are used for consideration of effect of sun blinding (SBE) of drivers and determination of dangerous because of sun sectors of road. Design of the road is held in special original software. When the road plan is designed, they consider
openaire   +1 more source

A Coscaling Grid for Athena++. II. Magnetohydrodynamics

open access: yesThe Astrophysical Journal Supplement Series
We extend the coscaling formalism of Habegger & Heitsch implemented in Athena++ to magnetohydrodynamics. The formalism relies on flow symmetries in astrophysical problems involving expansion, contraction, and center-of-mass motion. The formalism is fully
Fabian Heitsch, Roark Habegger
doaj   +1 more source

Equation versus AI: Predicting Density and Measuring Width of Molecular Clouds by Multiscale Decomposition

open access: yesThe Astrophysical Journal
The interstellar medium is ubiquitous throughout the universe across multiple scales. In this study, we introduce the multiscale decomposition reconstruction method, an equation-based model designed to derive width maps of interstellar medium structures ...
Mengke Zhao   +3 more
doaj   +1 more source

The Global Asteroseismology Project Proof of Concept: Asteroseismology of Massive Stars with Continuous Ground-based Observations

open access: yesThe Astronomical Journal
Massive (≳8 M _⊙ ) stars are the progenitors of many astrophysical systems, yet key aspects of their structure and evolution are poorly understood. Asteroseismology has the potential to solve these open puzzles; however, sampling both the short period ...
Noi Shitrit, Iair Arcavi
doaj   +1 more source

Fast Catalog Matching for Improved Posteriors via Constrained Clustering

open access: yesThe 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   +2 more
doaj   +1 more source

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

open access: yesJournal 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   +5 more
doaj   +1 more source

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

open access: yesGeochemistry, 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

Six Maxims of Statistical Acumen for Astronomical Data Analysis

open access: yesThe 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   +6 more
doaj   +1 more source

Spiritual Contributions of TGH. Ibrahim Al-Khalidy’s Prayer to SDGs Achievement on Lombok Island

open access: yesProfetika
Objective:  The purpose of this study is to analyze the algorithm for the preparation of the Prayer Schedule Throughout the Lifetime by TGH. Ibrahim al-Khalidy, evaluated its relevance, as well as tested its accuracy.
Abdul Kohar
doaj   +1 more source

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