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American Journal of Astronomy and Astrophysics

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2024, Volume 11
1. Issue 2, Jun.
2. Issue 1, Mar.
2023, Volume 10
1. Issue 2, Jun.
2. Issue 1, Mar.
2021, Volume 9
2020, Volume 8
2019, Volume 7
2018, Volume 6
2017, Volume 5
2016, Volume 4
2015, Volume 3
2014, Volume 2
2013, Volume 1

Volume 11, Issue 2, June 2024

Research Article
The Contribution of Host Galaxy Properties in X-Ray Active Galactic Nuclei Clusters

Gutu Mekonen^*, Anno Kare

Issue: Volume 11, Issue 2, June 2024

Pages: 33-50

Received: 22 May 2024

Accepted: 14 June 2024

Published: 29 June 2024

DOI: 10.11648/j.ajaa.20241102.11

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Abstract: In this study, the influence of host galaxy properties on X-ray active galactic nuclei (AGN) clusters was investigated using multiwavelength data. X-ray data from the eFEDS main catalog, optical and near-infrared data from the fourth data release of KiDS/VIKING, and mid-infrared data from WISE were utilized. By integrating these datasets and employ... Show More

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Research Article
An Analytical Model for Cosmology with a Single Input, the Redshift

Naser Mostaghel^*

Issue: Volume 11, Issue 2, June 2024

Pages: 51-64

Received: 1 June 2024

Accepted: 25 June 2024

Published: 8 July 2024

DOI: 10.11648/j.ajaa.20241102.12

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Abstract: We propose an analytical model for cosmology which requires only one parameter as an input. This parameter is the redshift. The model is based on conservation of energy, Planck’s Radiation Law, and the relation between energy and frequency of waves. The model yields the current age of the universe, the age of the universe at the CMB emission, as we... Show More

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