Preprint Communication Version 1 Preserved in Portico This version is not peer-reviewed

Jeans Instability, Jeans Entropy and the Entropy Origin of Gravity

Version 1 : Received: 7 October 2021 / Approved: 8 October 2021 / Online: 8 October 2021 (16:42:50 CEST)

How to cite: Bormashenko, E. Jeans Instability, Jeans Entropy and the Entropy Origin of Gravity. Preprints 2021, 2021100147 (doi: 10.20944/preprints202110.0147.v1). Bormashenko, E. Jeans Instability, Jeans Entropy and the Entropy Origin of Gravity. Preprints 2021, 2021100147 (doi: 10.20944/preprints202110.0147.v1).

Abstract

An entropic origin of gravity is re-visited. Isothermal self-gravitating cloud seen as an ideal gas is analyzed. Gravitational attraction within the isothermal cloud in equilibrium is balanced by the pressure, which is of a pure entropic nature. The notion of the Jeans entropy of the cloud corresponding to the entropy of the self-gravitating cloud in mechanical and thermal equilibrium is introduced. Balance of the gravitational compression and the entropic repulsion yields the scaling relation hinting to the entropic origin of the gravitational force. The analysis of the Jeans instability enables elimination of the “holographic screen” or “holographic principle” necessary for grounding of the entropic origin of gravity.

Keywords

gravity; entropic force; Jeans instability; isothermal self-gravitating cloud.

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