- #1

kodama

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- TL;DR Summary
- Noncommutative geometry and asymptotic safe gravity and MOND

I saw 2 recent papers on MOND

are they promising

[Submitted on 21 Jul 2022]

Peter K.F. Kuhfittig

[Submitted on 31 May 2022]

Bijan Bagchi, Sauvik Sen

are they promising

[Submitted on 21 Jul 2022]

### Noncommutative geometry and MOND

Peter K.F. Kuhfittig

Modified Newtonian dynamics (MOND) is a hypothesized modification of Newton's law of universal gravitation to account for the flat rotation curves in the outer regions of galaxies, thereby eliminating the need for dark matter. Although a highly successful model, it is not a self-contained physical theory since it is based entirely on observations. It is proposed in this paper that noncommutative geometry, an offshoot of string theory, can account for the flat rotation curves and thereby provide an explanation for MOND. This paper extends an earlier heuristic argument by the author.

Comments: | 5 pages, no figures |

Subjects: | General Relativity and Quantum Cosmology (gr-qc) |

Cite as: | arXiv:2207.10459 [gr-qc] |

(or arXiv:2207.10459v1 [gr-qc] for this version) | |

https://doi.org/10.48550/arXiv.2207.10459 |

[Submitted on 31 May 2022]

### MOND and asymptotic safe gravity

Bijan Bagchi, Sauvik Sen

The modified Newtonian dynamics (MOND) paradigm is discussed in the context of asymptotic safe gravity. We estimate quantum correction to the logarithmic potential which is well known to account for the constancy of the circular velocity v of the spiral galaxies. We determine plausible bounds on v.

Comments: | 7 pages |

Subjects: | General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th) |

Cite as: | arXiv:2205.15724 [gr-qc] |