Analyzing the Rotational Curves of Spiral Galaxies: Implications for Dark Matter and Galactic Dynamics
Published in Astronomy
Traditionally, mass distributions in galaxies were believed to follow a decline with radius,
according to Keplerian dynamics. However, observations have consistently demonstrated
that the rotational velocities of stars in the outer regions of spiral galaxies remain nearly
flat, contradicting expectations based solely on visible matter Rubin1980, Zwicky1937.
This observation gives rise to the necessity of dark matter, which is theorized to make up
approximately 85% of the universe’s total mass Bertone2010.
I am Diriba Gonfa Tolasa, my expertise in Astrophysics, Stellar Physics, and the intricate structures of galaxies and the universe fuels my passion for unraveling the mysteries of the cosmos. Contributing to the scientific community on a global scale is not just a profession but a calling that drives me to seek deeper insights into the workings of the universe. Born into the vibrant community of the Oromo people in the Horn of Africa, I carry with me the rich cultural heritage and values.Throughout my career, I have focused on diverse topics that have the potential to push the boundaries of scientific understanding. In the realm of General Astronomy, I have explored the fundamental principles governing the behavior and evolution of celestial objects, shedding light on the intricate workings of the universe. My expertise in Relativity has allowed me to delve into the intricacies of space, time, and the nature of gravity, contributing to our comprehension of the fabric of the cosmos.
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