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International Journal of Astronomy and Astrophysics (IJAA) is an international scientific journal dedicated to the publication and public discussion of high quality original research in all the fields of astrophysics and space sciences and related technology. All the manuscripts must be prepared in English and are sub…
Golden Gadzirayi Nyambuya
Following a detailed examination of the flyby anomaly phenomenon, we provide a clear derivation of Anderson et al. ’s empirical formula based on the Azimuthally Symmetric Theory of Gravitation (ASTG-model). Our review concentrates on the foundational origins…
Baocheng Qin
Traditionally, gamma-ray bursts (GRBs) are classified into long and short bursts based on the bimodal distribution of their duration. However, this phenomenological dichotomy has been challenged by recent observations, and current classification methods often…
Golden Gadzirayi Nyambuya
We propose a plausible solution to the long-standing paleoclimatology puzzle known as the Faint Young Sun Paradox through a combined two-fold hypothesis that involves the conservation of the radiation balance between the Earth and the Sun, alongside the conce…
Esmat Bekir
This paper presents an easy and efficient algorithm for solving Kepler’s equation. The main body of the algorithm uses the Newton-Raphson method to iteratively find the solution. The contribution herein is the introduction of an initial condition so close to…
Bruce Hoeneisen
Quasar light becomes absorbed by the Lyman- α line of neutral hydrogen in “clouds” along the line-of-sight in the highly ionized intergalactic medium after re-ionization. The received flux spectrum is known as the “Lyman- α forest”. Limits on the dark matter…
Lorenzo Zaninetti
We compare Planck’s distribution for spectral radiation with Callendar’s. We cover the two regimes of wavelengths and frequencies. In each of the four cases we evaluate the dependence of the spectral radiance on the temperature for the maximum, the standard d…
Noam Soker
I find that the dust morphologies in some core-collapse supernova (CCSN) remnants (CCSNRs) possess jet-shaped morphologies, and propose that the properties of the jets that explode the CCSNe and their interaction with the core and envelope (if it exists) are…
Noam Soker
I compare seven actively studied r-process nucleosynthesis scenarios against observed properties of r-process elements in the early Universe, and conclude that the most likely scenario to contribute to the site of elements below the third r-process peak is th…
Bruce Hoeneisen
Recently it has become possible to obtain the dark matter density ρ h ( r ) of dwarf spheroidal galaxies dSph by measuring the line-of-sight velocity of individual stars. Studying 27 dSph we have arrived at the following tentative conclusions: i) dark matter…
Lorenzo Zaninetti
We derive the acceleration, velocity and distance of a cosmic ray (CR) due to an astrophysical electric field in the framework of special relativity. The relation between distance and time has been inverted, which allows expressing the velocity as a function…
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International Journal of Astronomy and Astrophysics (IJAA) is an international scientific journal dedicated to the publication and public discussion of high quality original research in all the fields of astrophysics and space sciences and related technology. All the manuscripts must be prepared in English and are sub… All articles are open access under a CC BY 4.0 licence, with authors retaining copyright.
Authors submit their manuscript, metadata, and declarations through the portal. There is no submission fee.
The editorial office screens the manuscript for scope, completeness, and formatting before assigning a handling editor.
At least two independent reviewers evaluate the manuscript under single-blind review. Where revisions are required, authors respond point by point.
On acceptance the article processing charge is invoiced and the CC BY 4.0 copyright handover is signed.
The article is copyedited, typeset, and given a DOI, then publishes open access with a permanent link.
Manuscripts must be original and not under consideration elsewhere. Submit in Microsoft Word or LaTeX with figures at 300 dpi minimum. Structure research articles as Abstract, Introduction, Methods, Results, Discussion, and References.
Use the journal's numbered (Vancouver) reference style. Cite sources consecutively in the order they appear, and ensure every reference is complete and retrievable.
Declare all funding sources, conflicts of interest, and ethical approvals (including informed consent and animal-care statements where applicable).