Dark Matter Haloes and Rotation Curves via Brans-Dicke Theory

Details Dark Matter Haloes and Rotation Curves via Brans-Dicke Theory Dark Matter Haloes and Rotation Curves via Brans-Dicke Theory

2005-07-18

arxiv.org/abs/astro-ph/0507399v2

Astronomy and Astrophysics

Astrophysics

9 pages, Revtex4, Minor changes

Scientific paper

In the present work, the Brans-Dicke (BD) theory of gravity is taken as a possible theory of k-essence. Then starting with the (already known) Brans-Dicke-Schwarzschild solution which can represent the gravitationally bound static configurations of the BD scalar k-essence, issues like whether these configurations can reproduce the observed properties of galactic dark matter haloes have been addressed. It has been realized that indeed the BD scalar k-essence can cluster into dark matter halo-like objects with flattened rotation curves while exhibiting a dark energy-like negative pressure on larger scales.

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