skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The effects of Dark Matter annihilation on cosmic reionization

Journal Article · · The Astrophysical Journal (Online)
 [1];  [2];  [2]
  1. The Univ. of Chicago, Chicago, IL (United States)
  2. The Univ. of Chicago, Chicago, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

We revisit the possibility of constraining the properties of dark matter (DM) by studying the epoch of cosmic reionization. Previous studies have shown that DM annihilation was unlikely to have provided a large fraction of the photons that ionized the universe, but instead played a subdominant role relative to stars and quasars. The DM, however, begins to efficiently annihilate with the formation of primordial microhalos at $$z\sim100-200$$, much earlier than the formation of the first stars. Therefore, if DM annihilation ionized the universe at even the percent level over the interval $$z \sim 20-100$$, it can leave a significant imprint on the global optical depth, $$\tau$$. Moreover, we show that cosmic microwave background (CMB) polarization data and future 21 cm measurements will enable us to more directly probe the DM contribution to the optical depth. In order to compute the annihilation rate throughout the epoch of reionization, we adopt the latest results from structure formation studies and explore the impact of various free parameters on our results. Here, we show that future measurements could make it possible to place constraints on the dark matter's annihilation cross section that are at a level comparable to those obtained from the observations of dwarf galaxies, cosmic ray measurements, and studies of recombination.

Research Organization:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1325962
Report Number(s):
FERMILAB-PUB-15-510-A; arXiv:1512.00526; 1407795
Journal Information:
The Astrophysical Journal (Online), Vol. 833, Issue 2; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English

References (54)

Density profiles of CDM microhalos and their implications for annihilation boost factors journal April 2013
Evidence of patchy hydrogen reionization from an extreme Lyα trough below redshift six journal January 2015
THE AVERAGE STAR FORMATION HISTORIES OF GALAXIES IN DARK MATTER HALOS FROM z = 0-8 journal May 2013
How dark matter reionized the Universe journal August 2009
New Limits on Dark Matter Annihilation from Alpha Magnetic Spectrometer Cosmic Ray Positron Data journal October 2013
Impact of Dark Matter Annihilation on the High-Redshift Intergalactic Medium journal May 2008
Weak corrections are relevant for dark matter indirect detection journal March 2011
PPPC 4 DM ID: a poor particle physicist cookbook for dark matter indirect detection journal March 2011
Constraints on Dark Matter annihilations from reionization and heating of the intergalactic gas journal October 2009
Signatures of clumpy dark matter in the global 21 cm background signal journal November 2010
Electron Energy Deposition in a Gas Mixture of Atomic and Molecular Hydrogen and Helium journal November 1999
Earth-mass dark-matter haloes as the first structures in the early Universe journal January 2005
A Universal Model for halo Concentrations journal January 2015
Perturbed recombination from dark matter annihilation journal May 2013
Evolution of low mass Galactic Subhalos and Dependence on Concentration journal October 2015
The observable signature of late heating of the Universe during cosmic reionization journal February 2014
Effects of dark matter decay and annihilation on the high-redshift 21 cm background journal November 2006
Secondary ionization and heating by fast electrons journal March 2010
Cosmic Reionization on Computers. i. Design and Calibration of Simulations journal September 2014
Cosmic Reionization on Computers. ii. Reionization History and its Back-Reaction on Early Galaxies journal September 2014
The power spectrum of SUSY-CDM on subgalactic scales: CDM power spectrum on subgalactic scales journal August 2004
Constraints on leptonically annihilating dark matter from reionization and extragalactic gamma background journal August 2009
Hierarchical Formation of dark Matter Halos and the free Streaming Scale journal May 2014
Radiative feedback from high-mass X-ray binaries on the formation of the first galaxies and early reionization journal April 2014
Energy Dissipation of Energetic Electrons in the Inhomogeneous Intergalactic Medium During the Epoch of Reionization journal June 2016
Concordance models of reionization: implications for faint galaxies and escape fraction evolution: Concordance models of reionization journal April 2012
Eliminating the optical depth nuisance from the CMB with 21 cm cosmology journal February 2016
Contributions to cosmic reionization from dark matter annihilation and decay journal September 2016
Constraints on dark matter annihilation from CMB observations before Planck journal July 2013
Cosmic Reionization After Planck: Could Quasars do it all? journal October 2015
The Dependence of Subhalo Abundance on halo Concentration journal August 2015
Impact of dark matter decays and annihilations on reionization: Dark matter decays and annihilations journal June 2006
Future sensitivity of neutrino telescopes to dark matter annihilations from the cosmic diffuse neutrino signal journal June 2015
Model‐Independent Constraints on Reionization from Large‐Scale Cosmic Microwave Background Polarization journal January 2008
Simulations of Early Baryonic Structure Formation with Stream Velocity. ii. the gas Fraction journal December 2012
Dark matter annihilation and its effect on CMB and hydrogen 21 cm observations journal August 2009
A Universal Density Profile from Hierarchical Clustering journal December 1997
Planck 2015 results : XIII. Cosmological parameters journal September 2016
Dark Matter annihilations in halos and high-redshift sources of reionization of the universe journal December 2015
Formation of Galaxies and Clusters of Galaxies by Self-Similar Gravitational Condensation journal February 1974
What Mass Are the Smallest Protohalos? journal July 2006
Intergalactic medium heating by dark matter journal January 2007
The impact of dark matter decays and annihilations on the formation of the first structures: DM decays/annihilations and first structures journal February 2007
The flattening of the concentration–mass relation towards low halo masses and its implications for the annihilation signal boost journal June 2014
Particle decay in the early Universe: predictions for 21 cm journal August 2007
Heating and ionization by X-ray photoelectrons journal December 1979
X-ray secondary heating and ionization in quasar emission-line clouds journal November 1985
Indirect dark matter signatures in the cosmic dark ages. II. Ionization, heating, and photon production from arbitrary energy injections journal January 2016
X-ray emission from high-redshift miniquasars: self-regulating the population of massive black holes through global warming: IGM global warming by high-redshift miniquasars journal September 2012
Toward a Halo Mass Function for Precision Cosmology: The Limits of Universality journal December 2008
Particle energy cascade in the intergalactic medium journal March 2010
Constraining dark matter through 21-cm observations journal May 2007
Cosmic Microwave Background Constraints on the Duration and Timing of Reionization from the South pole Telescope journal August 2012
Universal clustering of dark matter in phase space journal January 2016

Similar Records

THE EFFECTS OF DARK MATTER ANNIHILATION ON COSMIC REIONIZATION
Journal Article · Tue Dec 20 00:00:00 EST 2016 · Astrophysical Journal · OSTI ID:1325962

Dark Matter annihilations in halos and high-redshift sources of reionization of the universe
Journal Article · Tue Dec 01 00:00:00 EST 2015 · Journal of Cosmology and Astroparticle Physics · OSTI ID:1325962

The 21 cm signal and the interplay between dark matter annihilations and astrophysical processes
Journal Article · Mon Aug 01 00:00:00 EDT 2016 · Journal of Cosmology and Astroparticle Physics · OSTI ID:1325962