Journal Article

<i>φ<sup>2</sup></i> as dark matter

Tonatiuh Matos, Alberto Vázquez-González and Juan Magaña

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 393, issue 4, pages 1359-1369
Published in print March 2009 | ISSN: 0035-8711
Published online February 2009 | e-ISSN: 1365-2966 | DOI:
φ2 as dark matter

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In this paper, we consider φ2 scalar field potential as a candidate to dark matter. If it is an ultralight boson particle, it condensates like a Bose–Einstein system at very early times and forms the basic structure of the Universe. Real scalar fields collapse in equilibrium configurations which oscillate in space–time (oscillatons).The cosmological behaviour of the field equations are solved using the dynamical system formalism. We use the current cosmological parameters as constraints for the present value of the scalar field and reproduce the cosmological predictions of the standard Λ cold dark matter model with this model. Therefore, scalar field dark matter seems to be a good alternative to cold dark matter nature.

Keywords: cosmology: theory; dark matter

Journal Article.  6386 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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