A New Force in the Dark Sector?
| dc.creator | Farrar, Glennys R. | |
| dc.creator | Rosen, Rachel A. | |
| dc.date | 2006-10-10 | |
| dc.date | 2007-03-15 | |
| dc.date.accessioned | 2026-07-07T11:04:16Z | |
| dc.date.available | 2026-07-07T11:04:16Z | |
| dc.description | We study the kinematics of dark matter using the massive cluster of galaxies 1E0657-56. The velocity of the "bullet" subcluster has been measured by X-ray emission from the shock front, and the masses and separation of the main and sub-clusters have been measured by gravitational lensing. The velocity with gravity alone is calculated in a variety of models of the initial conditions, mass distribution and accretion history; it is much higher than expected, by at least 2.4 sigma. The probability of so large a subcluster velocity in cosmological simulations is <~ 10^{-7}. A long range force with strength ~ 0.4 - 1.2 times that of gravity would provide the needed additional acceleration. | |
| dc.description | 4 pp -- updated to final version which will appear in March 30, 2007 Phys. Rev. Lett. Changes are minor, mainly additional references | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0610298 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0610298 | |
| dc.identifier | Phys.Rev.Lett.98:171302,2007 | |
| dc.identifier | doi:10.1103/PhysRevLett.98.171302 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/188831 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | A New Force in the Dark Sector? | |
| dc.type | text |