OSU Navigation Bar

The Ohio State University University Libraries Knowledge Bank

Can Heavy WIMPs Be Captured by the Earth?

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/47871

Show full item record

Files Size Format View
fac_GouldA_TheAstrophysicalJournal_2001_549_72.pdf 85.07Kb PDF View/Open

Title: Can Heavy WIMPs Be Captured by the Earth?
Creators: Gould, Andrew; Alam, S. M. Khairul
Keywords: minor planets, asteroids
dark matter
elementary particles
Galaxy: halo
Issue Date: 2001-03-01
Publisher: American Astronomical Society
Citation: Andrew Gould and S. M. Khairul Alam, "Can Heavy WIMPs Be Captured by the Earth?" The Astrophysical Journal, no. 1 (2001), doi:10.1086/319040
DOI: 10.1086/319040
Abstract: If weakly interacting massive particles (WIMPs) in bound solar orbits are systematically driven into the Sun by solar system resonances (as Farinella and coworkers have shown is the case for many Earth-crossing asteroids), then the capture of high-mass WIMPs by the Earth would be affected dramatically because high-mass WIMPs are captured primarily from bound orbits. WIMP capture would be eliminated for M_x > 630 GeV and would be highly suppressed for M_x >~ 150 GeV. Annihilation of captured WIMPs and anti-WIMPs is expected to give rise to neutrinos coming from the Earth's center. The absence of such a neutrino signal has been used to place limits on WIMP parameters. At present, one does not know whether typical WIMP orbits are in fact affected by these resonances. Until this question is investigated and resolved, one must (conservatively) assume that they are. Hence, limits on high-mass WIMP parameters are significantly weaker than was previously believed.
ISSN: 1538-4357
URI: http://hdl.handle.net/1811/47871
Bookmark and Share