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Dynamical Friction in Nonlocal Gravity

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arxiv 2107.05841 v3 pith:7OW36EO7 submitted 2021-07-13 gr-qc astro-ph.GA

Mahmood Roshan , Bahram Mashhoon This is my paper
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keywords nonlocaldynamicalfrictiongravitydarkmatteranalogueapparent
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We study dynamical friction in the Newtonian regime of nonlocal gravity (NLG), which is a classical nonlocal generalization of Einstein's theory of gravitation. The nonlocal aspect of NLG simulates dark matter. The attributes of the resulting effective dark matter are described and the main physical predictions of nonlocal gravity, which has a characteristic lengthscale of order 1 kpc, for galactic dynamics are presented. Within the framework of NLG, we derive the analogue of Chandrasekhar's formula for dynamical friction. The astrophysical implications of the results for the apparent rotation of a central bar subject to dynamical friction in a barred spiral galaxy are briefly discussed.

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Cited by 1 Pith paper

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  1. Dwarf galaxies in non-local gravity

    astro-ph.CO 2025-07 conditional novelty 5.0 of 10

    Non-local gravity can fit the velocity dispersions of eight dwarf spheroidals without dark matter, but its scale parameter is poorly constrained and two galaxies show tension with earlier rotation-curve results.

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