Showing 20 of 13,979 academic articles
Richard G. Arendt, F. Yusef-Zadeh, I. Heywood • The Astrophysical Journal Supplement Series
(2025)
We present a catalog of 1.28 GHz radio filaments observed by MeerKAT over the innermost 200 pc of the Galaxy (roughly ±1 $\mathop{.}\limits^{\unicode{x000b0}}$ 5), which includes the central molecular zone. The catalog is generated by repur...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4365/ae1296
Nizar Bouhlel, David Rousseau • Entropy
(2022)
This paper introduces a closed-form expression for the Kullback–Leibler divergence (KLD) between two central multivariate Cauchy distributions (MCDs) which have been recently used in different signal and image processing applications where ...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e24060838
Sebastián Castillo-Carrión, Alberto Javier Castro-Tirado • Advances in Astronomy
(2010)
We present a standalone software tool which makes reports for
analysis and evaluation of GRBs. Recently, analysis and evaluation of GRBs were done without help of semiautomated tools or routines; so the time elapsed from the detection until...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/2010/102831
Kris Davidson • Galaxies
(2020)
Very massive stars occasionally expel material in colossal eruptions, driven by continuum radiation pressure rather than blast waves. Some of them rival supernovae in total radiative output, and the mass loss is crucial for subsequent evolu...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/galaxies8010010
C. J. Harris, Kayhan Gültekin, Laura Blecha • The Astrophysical Journal
(2026)
We present a multimessenger investigation of supermassive black hole binary (SBHB) hardening by jointly comparing models to the observed stellar mass deficits of nearby core galaxies and to nanohertz gravitational-wave background measuremen...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/ae9767
Erica Behrens, Jeffrey G. Mangum, Mathilde Bouvier, Cosima Eibensteiner et al. • The Astrophysical Journal
(2026)
We quantify the utility of HCN and HNC to characterize gas conditions in the nearby starburst galaxy NGC 253. We use measurements from the Atacama Large Millimeter/Submillimeter Array (ALMA) Large Program ALCHEMI: the ALMA Comprehensive Hig...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/ae3567
Hui Liu, Bo Zhao, Linquan Huang • Entropy
(2019)
The paper proposes a lossless quantum image encryption scheme based on substitution tables (S-box) scrambling, mutation operation and general Arnold transform with keys. First, the key generator builds upon the foundation of SHA-256 hash wi...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e21040343
Sihan Xiong, Yiwei Fu, Asok Ray • Entropy
(2018)
This paper presents a nonparametric regression model of categorical time series in the setting of conditional tensor factorization and Bayes network. The underlying algorithms are developed to provide a flexible and parsimonious representat...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e20060396
Aziz Khan, Shougi S. Abosuliman, Saleem Abdullah, Muhammad Ayaz • Entropy
(2021)
Spherical hesitant fuzzy sets have recently become more popular in various fields. It was proposed as a generalization of picture hesitant fuzzy sets and Pythagorean hesitant fuzzy sets in order to deal with uncertainty and fuzziness inform...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e23040432
Tianbao Song, Zongyi Huang, Xin Liu, Jingbo Sun • Entropy
(2025)
This paper introduces a novel variational autoencoder model termed DVAE to prevent posterior collapse in text modeling. DVAE employs a dual-path architecture within its decoder: path A and path B. Path A makes the direct input of text insta...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e27040423
Wei Zhang, Christof Schütte • Entropy
(2017)
Many interesting rare events in molecular systems, like ligand association, protein folding or conformational changes, occur on timescales that often are not accessible by direct numerical simulation. Therefore, rare event approximation app...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e19070367
Jeremiah D. Paul, Richard M. Plotkin • The Astrophysical Journal
(2026)
The origin of core radio emission in radio-quiet active galactic nuclei (AGNs) is still actively debated. General-relativistic magnetohydrodynamics simulations often predict the launching of moderately large-scale jets from super-Eddington ...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/ae36a6
Xulun Ye, Jieyu Zhao, Yu Chen • Entropy
(2018)
Multi-manifold clustering is among the most fundamental tasks in signal processing and machine learning. Although the existing multi-manifold clustering methods are quite powerful, learning the cluster number automatically from data is stil...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e20110830
Zhichen Jing, Ying Li, Dechao Song, Qiao Li et al. • The Astrophysical Journal
(2026)
We present observations of an X1.2 white-light flare on 2023 January 6, which exhibits a rare quadrupolar white-light source configuration. This event was observed by the White-light Solar Telescope (WST; 3600 Å) onboard the Advanced Space-...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/ae9161
Aldo G. Sepulveda, Daniel Huber, Timothy R. Bedding, Daniel R. Hey et al. • The Astronomical Journal
(2024)
HIP 65426 hosts a young giant planet that has become the first exoplanet directly imaged with JWST. Using time-series photometry from the Transiting Exoplanet Survey Satellite (TESS), we classify HIP 65426 as a high-frequency δ Scuti pulsat...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-3881/ad4964
Ze-Nan Liu, Wei-Yang Wang, Yu-Chen Huang, Zi-Gao Dai • The Astrophysical Journal
(2025)
Fast radio bursts (FRBs) are millisecond-duration extragalactic transients characterized by ultrahigh brightness temperatures, suggesting coherent emission mechanisms in extreme astrophysical processes. In this paper, we extend the bunched ...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/adea76
T. Morishita, M. Stiavelli • The Astrophysical Journal Letters
(2023)
This paper highlights initial photometric analyses of JWST NIRCam imaging data in the sightline of SMACS0723, aiming to identify galaxies at redshift z > 7. By applying a conservative Lyman-break selection followed by photometric-redshift a...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/2041-8213/acbf50
Bodie Breza, Matthew C. Nixon, Eliza M.-R. Kempton • The Astrophysical Journal Letters
(2025)
The evolution and structure of sub-Neptunes may be strongly influenced by interactions between the outer gaseous envelope of the planet and a surface magma ocean. However, given the wide variety of permissible interior structures of these p...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/2041-8213/ae0c07
Yanpeng Zhang, Wenjie Dong, Jing Zhang, Qun Ding • Entropy
(2023)
Most existing chaotic systems have many drawbacks in engineering applications, such as the discontinuous range of chaotic parameters, weak chaotic properties, uneven chaotic sequence outputs, and dynamic degradation. Therefore, based on the...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/e25071005
Yasufumi Kojima • The Astrophysical Journal
(2024)
Magnetar outbursts are powered by an intense magnetic field. The phenomenon has recently drawn significant attention because of a connection to some fast radio bursts that has been reported. Understanding magnetar outbursts may provide the ...
DOAJ
Open Access (DOAJ)
DOI: 10.3847/1538-4357/ad7382