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Impact of dark matter decays and annihilations on reionization
Open accessAbstract
One of the possible methods to distinguish among various dark matter (DM) candidates is to study the effects of DM decays. We consider four different DM candidates [light dark matter (LDM), gravitinos, neutralinos and sterile neutrinos], for each of them deriving the decaying/annihilation rate, the influence on reionization, matter temperature and cosmic microwave background (CMB) spectra. We find that LDM particles (1–10 MeV) and sterile neutrinos (2–8 keV) can be sources of partial early reionization (z≲ 100). However, their integrated contribution to Thomson optical depth is small (≲ 0.01) with respect to the 3-yr WMAP results (τe= 0.09 ± 0.03). Finally, they can significantly affect the behaviour of matter temperature. On the contrary, effects of heavy DM candidates (gravitinos and neutralinos) on reionization and heating are minimal. All the considered DM particles have completely negligible effects on the CMB spectra.
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Cites
Spergel, D. N., Verde, L., Peiris, H. V., Komatsu, E., Nolta, M. R., Bennett, C. L., Halpern, M., Hinshaw, G., Jarosik, N., Kogut, A., et al. (2003) · The Astrophysical Journal Supplement Series · doi:10.1086/377226 · Cited by 10,976
Particle dark matter: evidence, candidates and constraints
Bertone, G., Hooper, D., & Silk, J. (2005) · Physics Reports · doi:10.1016/j.physrep.2004.08.031 · Cited by 4,979
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Dayal, P., & Ferrara, A. (2018) · Physics Reports · doi:10.1016/j.physrep.2018.10.002 · Cited by 403
Self-citationThe physics of the intergalactic medium
Meiksin, A. A. (2009) · Reviews of Modern Physics · doi:10.1103/revmodphys.81.1405 · Cited by 344
How to find neutral leptons of the νMSM?
Gorbunov, D., & Shaposhnikov, M. (2007) · Journal of High Energy Physics · doi:10.1088/1126-6708/2007/10/015 · Cited by 314
Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
Petraki, K., & Kusenko, A. (2008) · Physical Review D · doi:10.1103/physrevd.77.065014 · Cited by 305
A lower bound on the mass of cold thermal dark matter from Planck
Bœhm, C., Dolan, M. J., & McCabe, C. (2013) · Journal of Cosmology and Astroparticle Physics · doi:10.1088/1475-7516/2013/08/041 · Cited by 278
Metadata
- Authors
- Mapelli, M., Ferrara, A., & Pierpaoli, E.
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 2006-06-07
- Volume
- 369
- Issue
- 4
- Pages
- 1719-1724
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W1778491405
- Cited by
- 178
- References
- 2
- FWCI
- 13.50
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Mapelli, M., Ferrara, A., & Pierpaoli, E. (2006). Impact of dark matter decays and annihilations on reionization. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1111/j.1365-2966.2006.10408.x
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