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Title: A critical reevaluation of radio constraints on annihilating dark matter

Abstract

A number of groups have employed radio observations of the Galactic center to derive stringent constraints on the annihilation cross section of weakly interacting dark matter. In this paper, we show that electron energy losses in this region are likely to be dominated by inverse Compton scattering on the interstellar radiation field, rather than by synchrotron, considerably relaxing the constraints on the dark matter annihilation cross section compared to previous works. Strong convective winds, which are well motivated by recent observations, may also significantly weaken synchrotron constraints. After taking these factors into account, we find that radio constraints on annihilating dark matter are orders of magnitude less stringent than previously reported, and are generally weaker than those derived from current gamma-ray observations.

Authors:
 [1];  [2];  [3]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, IL (United States). Dept. of Astronomy and Astrophysics
  3. Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics (KICP)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1296795
Alternate Identifier(s):
OSTI ID: 1177474
Report Number(s):
FERMILAB-PUB-14-303-A; arXiv:1408.6224
Journal ID: ISSN 1550-7998; PRVDAQ; 1312355
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review. D, Particles, Fields, Gravitation and Cosmology
Additional Journal Information:
Journal Volume: 91; Journal Issue: 8; Journal ID: ISSN 1550-7998
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Cholis, Ilias, Hooper, Dan, and Linden, Tim. A critical reevaluation of radio constraints on annihilating dark matter. United States: N. p., 2015. Web. doi:10.1103/PhysRevD.91.083507.
Cholis, Ilias, Hooper, Dan, & Linden, Tim. A critical reevaluation of radio constraints on annihilating dark matter. United States. doi:10.1103/PhysRevD.91.083507.
Cholis, Ilias, Hooper, Dan, and Linden, Tim. Wed . "A critical reevaluation of radio constraints on annihilating dark matter". United States. doi:10.1103/PhysRevD.91.083507. https://www.osti.gov/servlets/purl/1296795.
@article{osti_1296795,
title = {A critical reevaluation of radio constraints on annihilating dark matter},
author = {Cholis, Ilias and Hooper, Dan and Linden, Tim},
abstractNote = {A number of groups have employed radio observations of the Galactic center to derive stringent constraints on the annihilation cross section of weakly interacting dark matter. In this paper, we show that electron energy losses in this region are likely to be dominated by inverse Compton scattering on the interstellar radiation field, rather than by synchrotron, considerably relaxing the constraints on the dark matter annihilation cross section compared to previous works. Strong convective winds, which are well motivated by recent observations, may also significantly weaken synchrotron constraints. After taking these factors into account, we find that radio constraints on annihilating dark matter are orders of magnitude less stringent than previously reported, and are generally weaker than those derived from current gamma-ray observations.},
doi = {10.1103/PhysRevD.91.083507},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 8,
volume = 91,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2015},
month = {Wed Apr 01 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 18 works
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