Surface Density of Disk Galaxies in MOND
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 <inline-formul...
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MDPI AG
2023-01-01
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| Online Access: | https://www.mdpi.com/2218-1997/9/1/32 |
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| author | Antonino Del Popolo Morgan Le Delliou |
| author_facet | Antonino Del Popolo Morgan Le Delliou |
| author_sort | Antonino Del Popolo |
| collection | DOAJ |
| description | 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>a</mi><mn>0</mn></msub></semantics></math></inline-formula>. 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. |
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| format | Article |
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| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T11:05:07Z |
| publishDate | 2023-01-01 |
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| spelling | doaj.art-6a4ba64bbdae49f7974d63d93a1f84c32023-12-01T00:59:11ZengMDPI AGUniverse2218-19972023-01-01913210.3390/universe9010032Surface Density of Disk Galaxies in MONDAntonino Del Popolo0Morgan Le Delliou1Dipartimento di Fisica e Astronomia, University of Catania, Viale Andrea Doria 6, 95125 Catania, ItalyInstitute of Theoretical Physics, School of Physical Science and Technology, Lanzhou University, No. 222, South Tianshui Road, Lanzhou 730000, ChinaIn 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 <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>a</mi><mn>0</mn></msub></semantics></math></inline-formula>. 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.https://www.mdpi.com/2218-1997/9/1/32galaxiesalternative theory of gravitygalaxies surface density |
| spellingShingle | Antonino Del Popolo Morgan Le Delliou Surface Density of Disk Galaxies in MOND Universe galaxies alternative theory of gravity galaxies surface density |
| title | Surface Density of Disk Galaxies in MOND |
| title_full | Surface Density of Disk Galaxies in MOND |
| title_fullStr | Surface Density of Disk Galaxies in MOND |
| title_full_unstemmed | Surface Density of Disk Galaxies in MOND |
| title_short | Surface Density of Disk Galaxies in MOND |
| title_sort | surface density of disk galaxies in mond |
| topic | galaxies alternative theory of gravity galaxies surface density |
| url | https://www.mdpi.com/2218-1997/9/1/32 |
| work_keys_str_mv | AT antoninodelpopolo surfacedensityofdiskgalaxiesinmond AT morganledelliou surfacedensityofdiskgalaxiesinmond |