Spiral galaxy rotation curves described using cosmological general relativity

2007 ◽  
Author(s):  
John G. Hartnett
Keyword(s):  
General Relativity ◽  
Spiral Galaxy ◽  
Rotation Curves ◽  
Galaxy Rotation Curves

scholarly journals Excluded Volume for Flat Galaxy Rotation Curves in Newtonian Gravity and General Relativity

Symmetry ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 398 ◽  
Author(s):  
Rand Dannenberg
Keyword(s):  
General Relativity ◽  
Gravitational Constant ◽  
Excluded Volume ◽  
Newtonian Gravity ◽  
Least Action Principle ◽  
Rotation Curves ◽  
Least Action ◽  
A Charge ◽  
Vacuum Solutions ◽  
Galaxy Rotation Curves

Using the classical vacuum solutions of Newtonian gravity that do not explicitly involve matter, dark matter, or the gravitational constant, subject to an averaging process, a form of gravity relevant to the flattening of galaxy rotation curves results. The latter resembles the solution found if the vacuum is simply assigned a gravitational field density, and a volume of the vacuum is then excluded, with no averaging process. A rationale then follows for why these terms would become important on the galactic scale. Then, a modification of General Relativity, motivated by the Newtonian solutions, that are equivalent to a charge void, is partially defined and discussed in terms of a least action principle.

scholarly journals On galaxy rotation curves from a continuum mechanics approach to modified gravity

2018 ◽  
Vol 27 (02) ◽  
pp. 1850007 ◽  
Author(s):  
Christian G. Böhmer ◽  
Nicola Tamanini ◽  
Matthew Wright
Keyword(s):  
General Relativity ◽  
Dark Matter ◽  
Continuum Mechanics ◽  
Modified Gravity ◽  
Galactic Rotation ◽  
Dark Matter Halos ◽  
Additional Structure ◽  
Rotation Curves ◽  
Small Deviations ◽  
Galaxy Rotation Curves

We consider a modification of General Relativity motivated by the treatment of anisotropies in Continuum Mechanics. The Newtonian limit of the theory is formulated and applied to galactic rotation curves. By assuming that the additional structure of spacetime behaves like a Newtonian gravitational potential for small deviations from isotropy, we are able to recover the Navarro–Frenk–White profile of dark matter halos by a suitable identification of constants. We consider the Burkert profile in the context of our model and also discuss rotation curves more generally.

scholarly journals Spiral galaxy rotation curves in the Horava-Lifshitz gravity theory

2012 ◽  
Vol 423 (1) ◽  
pp. 141-148 ◽  
Author(s):  
V. F. Cardone ◽  
M. Capone ◽  
N. Radicella ◽  
M. L. Ruggiero
Keyword(s):  
Spiral Galaxy ◽  
Gravity Theory ◽  
Rotation Curves ◽  
Galaxy Rotation Curves

Extinction Effects in Spiral Galaxy Rotation Curves

2004 ◽  
Vol 128 (1) ◽  
pp. 115-120 ◽  
Author(s):  
Carlos Valotto ◽  
Riccardo Giovanelli
Keyword(s):  
Spiral Galaxy ◽  
Rotation Curves ◽  
Galaxy Rotation Curves

scholarly journals The Inner Scale Length of Spiral Galaxy Rotation Curves

2002 ◽  
Vol 571 (2) ◽  
pp. L107-L111 ◽  
Author(s):  
Riccardo Giovanelli ◽  
Martha P. Haynes
Keyword(s):  
Spiral Galaxy ◽  
Rotation Curves ◽  
Inner Scale ◽  
Galaxy Rotation Curves ◽  
Scale Length
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