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- Title
Surface Density of Disk Galaxies in MOND.
- Authors
Del Popolo, Antonino; Le Delliou, Morgan
- Abstract
In this paper, we extend a paper by Milgrom (2009, MNRAS 398, 1023) dealing with the existence of a quasi-universal surface density for object of all mass and structure, if they are in the Newtonian regime, i.e., that their mean acceleration is larger than MOND typical acceleration a 0 . This result is in agreement with Donato et al. (2009)'s results, claiming the existence of a quasi-universal surface density in all masses in galaxies. The Milgrom paper also predicts that objects with mean inner acceleration smaller than the values discussed do not show the quasi-universal behavior of the surface density discussed. In the present paper, we extend the result of Milgrom's paper, based on a point mass model, considering spiral galaxies, modelled with a double exponential disk. Similar to Milgrom's results, we find the existence of a universal surface density for galaxies with large surface density, and a different behavior for galaxies having small surface density.
- Subjects
DISK galaxies; DENSITY; SPIRAL galaxies
- Publication
Universe (2218-1997), 2023, Vol 9, Issue 1, p32
- ISSN
2218-1997
- Publication type
Article
- DOI
10.3390/universe9010032