ItemArticle

Modication of Newtonian Gravity: Implications for hot gas in clusters and galactic angular momentum

Title
Modication of Newtonian Gravity: Implications for hot gas in clusters and galactic angular momentum
Creator
Rebecca, Louise; Sebastian, Dominic; Sivaram, C.; Arun, Kenath
Description
In view of the negative results from various dark matter detection experiments, we had earlier proposed an alternate theoretical framework through modication of Newtonian gravity (MONG). Here, the Poison's equation is modied by introducing an additional gravitational self-energy density term along with the usual dark energy density term. In this work, we extend this model to account for the presence of low-density gas at high temperatures 08Kin the intra cluster medium (ICM) by estimating the velocities to which particles will be subjected by the modied gravitational force. Considering that the ICM is under the inuence of the cluster's gravity, particle velocities of the ions in the ICM must be balanced by the cluster's gravitational force. The particle velocities obtained for various clusters from their temperature proles match the velocity produced by the MONG gravitational force. Thus, the increase in the gravitational potential at the outskirts of galaxies balances the thermal pressure of the ICM, maintaining hydrostatic equilibrium without invoking DM. The eect of MONG on the angular momentum of galaxies is also studied by obtaining a scaling relation between the angular momentum and the mass of a galaxy. MONG predicts a higher dependence on mass in comparison to the CDM model. This increased dependence of angular momentum on mass compensates for the halo contribution to the angular momentum. The angular momentum from MONG for galaxies from the spritzer photometry and accurate rotation curves (SPARC) database is compared to the halo angular momentum by a chi-square t technique. The correlation coecient is found to be unity, showing a replicable result. 2025 World Scientific Publishing Company.
Source
Modern Physics Letters A;Volume;40;Issue;15-16;Article No.;2550045;
Date
01-01-2025
Publisher
World Scientific
Subject
galactic angular momentum; hot gas in clusters; Modication of Newtonian Gravity
Coverage
Rebecca L., Department of Physics and Electronics, Christ University, Karnataka, Bangalore, 560029, India; Sebastian D., Department of Physics and Electronics, Christ University, Karnataka, Bangalore, 560029, India; Sivaram C., Indian Institute of Astrophysics, Karnataka, Bangalore, 560034, India; Arun K., Department of Physics and Electronics, Christ University, Karnataka, Bangalore, 560029, India
Rights
All Open Access; Green Open Access
Relation
ISSN: 2177323; CODEN: MPLAE
Format
online
Language
English
Type
Article

Citation

Rebecca, Louise; Sebastian, Dominic; Sivaram, C.; Arun, Kenath, “Modication of Newtonian Gravity: Implications for hot gas in clusters and galactic angular momentum,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 19, 2026, https://archives.christuniversity.in/items/show/23012.

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