Modeling galactic halos with predominantly quintessential matter

Details Modeling galactic halos with predominantly quintessential matter Modeling galactic halos with predominantly quintessential matter

2011-01-13

arxiv.org/abs/1101.2515v1

Int.J.Theor.Phys.50:2655-2665,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 1 figure

Scientific paper

10.1007/s10773-011-0761-7

This paper discusses a new model for galactic dark matter by combining an anisotropic pressure field corresponding to normal matter and a quintessence dark energy field having a characteristic parameter $\omega_q$ such that $-1<\omega_q< -\frac{1}{3}$. Stable stellar orbits together with an attractive gravity exist only if $\omega_q$ is extremely close to $-\frac{1}{3}$, a result consistent with the special case studied by Guzman et al. (2003). Less exceptional forms of quintessence dark energy do not yield the desired stable orbits and are therefore unsuitable for modeling dark matter.

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