云南高校图书馆联盟文献共享服务平台- International Journal of Astronomy and Astrophysics

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Transport in Astrophysics: VII. Solar Modulation of the Cosmic Rays: 《International Journal of Astronomy and Astrophysics》2024年第4期245-258,共14页Lorenzo Zaninetti; Two existing solutions for the diffusion of cosmic rays (CRs) are analyzed. The first one is a well-known solution in 3D over an infinite spatial domain and the second one is a 1D solution with an exponential decay in...; 关键词：Cosmic Rays Particle Diffusion Random Walks

Universe Expansion and Gravitation Unified: 《International Journal of Astronomy and Astrophysics》2024年第4期259-276,共18页Antonio Medina; Aims: The expansion of the Universe and gravitation are considered different fundamental properties of the cosmos. We explore whether they are connected and propose an equation that links and unifies them. This equati...; 关键词：GRAVITATION UNIVERSE Cosmological Theories Visible Universe Hubble Expansion Cosmological Models Flat Space Cosmology Dark Energy Dark Matter Hubble Parameter Critical Density

The Dependence between Solar Flare Emergence and the Average Background Solar X-Ray Flux Emission: 《International Journal of Astronomy and Astrophysics》2024年第3期149-161,共13页Yael Peleg Rami Babayew Itzhak Orion; Solar flares, sudden bursts of intense electromagnetic radiation from the Sun, can significantly disrupt technological infrastructure, including communication and navigation satellites. To mitigate these risks, accura...; 关键词：Space Weather Solar Flare Solar Activity SUNSPOTS Solar Cycle

Thin-Shell Wormholes Admitting Conformal Motions in Spacetimes of Embedding Class One: 《International Journal of Astronomy and Astrophysics》2024年第3期162-171,共10页Peter K. F. Kuhfittig; This paper discusses the feasibility of thin-shell wormholes in spacetimes of embedding class one admitting a one-parameter group of conformal motions. It is shown that the surface energy density σis positive, while ...; 关键词：Thin-Shell Wormholes Conformal Symmetry Embedding Class One Exotic Matter

Dark Matter Density Profiles of Selected Spiral Galaxies: 《International Journal of Astronomy and Astrophysics》2024年第3期172-183,共12页Alberto Sadun Brittany Salmon Conor Evans Masoud Asadi-Zeydabadi; Understanding the dark matter distribution throughout a galaxy can provide insight into its elusive nature. Numerous density profiles, such as the Navarro, Frenk and White model, have been created in an attempt to stu...; 关键词：Dark Matter Density Galactic Rotation Curves Spiral Galaxies NGC 2841 NGC 4527 NGC 4945 NGC 3198

Measurements of the Dark Matter Mass, Temperature and Spin: 《International Journal of Astronomy and Astrophysics》2024年第3期184-202,共19页Bruce Hoeneisen; We summarize several measurements of the dark matter temperature-to-mass ratio, or equivalently, of the comoving root-mean-square thermal velocity of warm dark matter particles vhrms(1). The most reliable determinatio...; 关键词：Warm Dark Matter Dwarf Galaxies Spiral Galaxies Elliptical Galaxies Galaxy Distributions First Galaxies REIONIZATION

New Probability Distributions in Astrophysics: XIII. Truncation for the Benini Distribution: 《International Journal of Astronomy and Astrophysics》2024年第3期203-219,共17页Lorenzo Zaninetti; In order to introduce a right truncated version of the Benini distribution, we derive its probability density function, its distribution function, its average value, its kth moment about the origin, its median, how to...; 关键词：Stars: Normal Stars: Luminosity Function Mass Function Stars: Statistics

Swift XRT Analysis of Type II-P Supernova SN 2008ij: 《International Journal of Astronomy and Astrophysics》2024年第3期220-229,共10页SH. M. Shehata Ahmed M. Fouad R. M. Samir A. A. Shaker; This study investigates the X-ray properties and evolution of Type II supernovae (SNe II) observed by Swift, examining variations among supernovae and exploring their X-ray characteristics over time. We present the fi...; 关键词：X-Ray Core Collapse Supernova Swift (XRT) Observations

Macroscopic Traversable Wormholes: Minimum Requirements: 《International Journal of Astronomy and Astrophysics》2024年第3期230-243,共14页Peter K. F. Kuhfittig; While wormholes are just as good a prediction of Einstein’s theory as black holes, they are subject to severe restrictions from quantum field theory. To allow for the possibility of interstellar travel, a macroscopic...; 关键词：Morris-Thorne Wormholes Traversability Minimum Requirements STABILITY Compatibility with Quantum Field Theory

A Simulation of the Dependence of Tidal Interaction on Galaxy Type in Compact Groups: 《International Journal of Astronomy and Astrophysics》2024年第2期85-100,共16页Mark J. Henriksen Mateo Mejia; We have investigated the role that different galaxy types have in galaxy-galaxy interactions in compact groups. N-body simulations of 6 galaxies consisting of a differing mixture of galaxy types were run to compare th...; 关键词：Galaxy Groups Galaxy Clusters Galaxy Evolution N-Body Simulations

《International Journal of Astronomy and Astrophysics》