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Dark matter and rotation curves of spiral galaxies
- 1.0461451 - MÚ 2017 RIV BG eng J - Journal Article
Křížek, Michal - Křížek, Filip - Somer, L.
Dark matter and rotation curves of spiral galaxies.
Bulgarian astronomical journal. Roč. 25, April (2016), s. 64-77. ISSN 1313-2709
R&D Projects: GA MŠMT(CZ) LG15052
Institutional support: RVO:67985840 ; RVO:61389005
Keywords : red dwarf * dark matter * spiral galaxy
OECD category: Astronomy (including astrophysics,space science)
http://www.astro.bas.bg/AIJ/issues/n25/MKrizek.pdf
We suggest that nonbaryonic dark matter need not be taken into account to explain the observed rapid rotation of spiral galaxies. The main reason is a special form of the gravitational potential of a flat disk which guarantees large orbital velocities of stars at the galaxy edge. In particular, we prove that a star orbiting a central mass point along a circular trajectory of radius R has a smaller speed than if it were to orbit a flat disk of radius R and the same mass with an arbitrary rotationally symmetric density distribution.
Permanent Link: http://hdl.handle.net/11104/0261043
File Download Size Commentary Version Access Krizek2.pdf 1 1.4 MB Publisher’s postprint open-access
Number of the records: 1