Dark matter distribution in superthin galaxies
ABSTRACT This paper presents a new method of calculating dark matter density profiles for superthin axial symmetric galaxies without a bulge. This method is based on a simple physical model, which includes an infinitely thin galactic disc immersed in a spherically symmetric halo of dark matter. To o...
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Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2020-07, Vol.495 (4), p.3722-3726 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | ABSTRACT
This paper presents a new method of calculating dark matter density profiles for superthin axial symmetric galaxies without a bulge. This method is based on a simple physical model, which includes an infinitely thin galactic disc immersed in a spherically symmetric halo of dark matter. To obtain the desired distribution density, it suffices to know a distribution of visible matter surface density in a galaxy and a dependence of angular velocity on the radius. As a byproduct, the well-known expression, which reproduces surface density of a superthin galaxy expressed through a rotation law, was obtained. |
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ISSN: | 0035-8711 1365-2966 |
DOI: | 10.1093/mnras/staa1427 |