Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2010-08-31
JCAP 1011:002,2010
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
23 pages, 8 figures; accepted for publication by JCAP after minor changes
Scientific paper
10.1088/1475-7516/2010/11/002
The existence and detection of scalar fields could provide solutions to long-standing puzzles about the nature of dark matter, the dark compact objects at the centre of most galaxies, and other phenomena. Yet, self-interacting scalar fields are very poorly constrained by astronomical observations, leading to great uncertainties in estimates of the mass $m_\phi$ and the self-interacting coupling constant $\lambda$ of these fields. To counter this, we have systematically employed available astronomical observations to develop new constraints, considerably restricting this parameter space. In particular, by exploiting precise observations of stellar dynamics at the centre of our Galaxy and assuming that these dynamics can be explained by a single boson star, we determine an upper limit for the boson star compactness and impose significant limits on the values of the properties of possible scalar fields. Requiring the scalar field particle to follow a collisional dark matter model further narrows these constraints. Most importantly, we find that if a scalar dark matter particle does exist, then it cannot account for both the dark-matter halos and the existence of dark compact objects in galactic nuclei
Amaro-Seoane Pau
Barranco Juan
Bernal Argelia
Rezzolla Luciano
No associations
LandOfFree
Constraining scalar fields with stellar kinematics and collisional dark matter does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Constraining scalar fields with stellar kinematics and collisional dark matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraining scalar fields with stellar kinematics and collisional dark matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-644959