Angular distribution of gamma-ray emission from velocity-dependent dark matter annihilation in subhalos
Abstract
We consider the effect of velocity-dependent dark matter annihilation on the angular distribution of gamma rays produced in dark matter subhalos. We assume that the dark matter potential is spherically symmetric, characterized by a scale radius and scale density, and the velocity distribution is isotropic. We find that the effect of velocity-dependent dark matter annihilation is largely determined by dimensional analysis; the angular size of gamma-ray emission from an individual subhalo is rescaled by a factor which depends on the form of the dark matter distribution, but not on the halo parameters, while the relative normalization of the gamma-ray flux from different mass subhalos is rescaled by a factor which depends on the halo parameters, but not on the form of the dark matter distribution. We apply our results to a Navarro-Frenk-White profile for the case of an individual subhalo and comment on the application of these results to a distribution of subhalos.
- Authors:
-
[2];
- Johns Hopkins Univ., Baltimore, MD (United States)
- Univ. of Hawaii, Honolulu, HI (United States)
- Texas A & M Univ., College Station, TX (United States)
- Publication Date:
- Research Org.:
- Univ. of Hawaii, Honolulu, HI (United States). High Energy Physics Group
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1598682
- Alternate Identifier(s):
- OSTI ID: 1780925
- Grant/Contract Number:
- SC0010504
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 100; Journal Issue: 6; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Boddy, Kimberly K., Kumar, Jason, Runburg, Jack, and Strigari, Louis E. Angular distribution of gamma-ray emission from velocity-dependent dark matter annihilation in subhalos. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.063019.
Boddy, Kimberly K., Kumar, Jason, Runburg, Jack, & Strigari, Louis E. Angular distribution of gamma-ray emission from velocity-dependent dark matter annihilation in subhalos. United States. https://doi.org/10.1103/PhysRevD.100.063019
Boddy, Kimberly K., Kumar, Jason, Runburg, Jack, and Strigari, Louis E. Mon .
"Angular distribution of gamma-ray emission from velocity-dependent dark matter annihilation in subhalos". United States. https://doi.org/10.1103/PhysRevD.100.063019. https://www.osti.gov/servlets/purl/1598682.
@article{osti_1598682,
title = {Angular distribution of gamma-ray emission from velocity-dependent dark matter annihilation in subhalos},
author = {Boddy, Kimberly K. and Kumar, Jason and Runburg, Jack and Strigari, Louis E.},
abstractNote = {We consider the effect of velocity-dependent dark matter annihilation on the angular distribution of gamma rays produced in dark matter subhalos. We assume that the dark matter potential is spherically symmetric, characterized by a scale radius and scale density, and the velocity distribution is isotropic. We find that the effect of velocity-dependent dark matter annihilation is largely determined by dimensional analysis; the angular size of gamma-ray emission from an individual subhalo is rescaled by a factor which depends on the form of the dark matter distribution, but not on the halo parameters, while the relative normalization of the gamma-ray flux from different mass subhalos is rescaled by a factor which depends on the halo parameters, but not on the form of the dark matter distribution. We apply our results to a Navarro-Frenk-White profile for the case of an individual subhalo and comment on the application of these results to a distribution of subhalos.},
doi = {10.1103/PhysRevD.100.063019},
journal = {Physical Review D},
number = 6,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 1 work
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Dark matter annihilation rates with velocity-dependent annihilation cross sections
journal, April 2009
- Robertson, Brant E.; Zentner, Andrew R.
- Physical Review D, Vol. 79, Issue 8
Dark matter in dwarf spheroidal galaxies and indirect detection: a review
journal, March 2018
- Strigari, Louis E.
- Reports on Progress in Physics, Vol. 81, Issue 5
Dark Matter Limits from Dwarf Spheroidal Galaxies with the HAWC Gamma-Ray Observatory
journal, February 2018
- Albert, A.; Alfaro, R.; Alvarez, C.
- The Astrophysical Journal, Vol. 853, Issue 2
SEARCH FOR EXTENDED GAMMA-RAY EMISSION FROM THE VIRGO GALAXY CLUSTER WITH FERMI -LAT
journal, October 2015
- Ackermann, M.; Ajello, M.; Albert, A.
- The Astrophysical Journal, Vol. 812, Issue 2
Gamma-ray evidence for dark matter clumps
journal, January 2014
- Belotsky, K.; Kirillov, A.; Khlopov, M.
- Gravitation and Cosmology, Vol. 20, Issue 1
Internal Bremsstrahlung Signature of Real Scalar Dark Matter and Consistency with Thermal Relic Density
journal, August 2013
- Toma, Takashi
- Physical Review Letters, Vol. 111, Issue 9
A theory of dark matter
journal, January 2009
- Arkani-Hamed, Nima; Finkbeiner, Douglas P.; Slatyer, Tracy R.
- Physical Review D, Vol. 79, Issue 1
Dynamical Constraints on the Dark Matter Distribution of the Sculptor Dwarf Spheroidal from Stellar Proper Motions
journal, June 2018
- Strigari, Louis E.; Frenk, Carlos S.; White, Simon D. M.
- The Astrophysical Journal, Vol. 860, Issue 1
Beyond subhalos: Probing the collective effect of the Universe’s small-scale structure with gravitational lensing
journal, July 2019
- Cyr-Racine, Francis-Yan; Keeton, Charles R.; Moustakas, Leonidas A.
- Physical Review D, Vol. 100, Issue 2
Effective -factor of the Galactic Center for velocity-dependent dark matter annihilation
journal, September 2018
- Boddy, Kimberly K.; Kumar, Jason; Strigari, Louis E.
- Physical Review D, Vol. 98, Issue 6
Constraint on the velocity dependent dark matter annihilation cross section from gamma-ray and kinematic observations of ultrafaint dwarf galaxies
journal, March 2018
- Zhao, Yi; Bi, Xiao-Jun; Yin, Peng-Fei
- Physical Review D, Vol. 97, Issue 6
Unresolved Gamma-Ray Sky through its Angular Power Spectrum
journal, December 2018
- Ackermann, M.; Ajello, M.; Baldini, L.
- Physical Review Letters, Vol. 121, Issue 24
The Phase‐Space Density Profiles of Cold Dark Matter Halos
journal, December 2001
- Taylor, James E.; Navarro, Julio F.
- The Astrophysical Journal, Vol. 563, Issue 2
Angular power spectrum of the diffuse gamma-ray emission as measured by the Fermi Large Area Telescope and constraints on its dark matter interpretation
journal, December 2016
- Fornasa, Mattia; Cuoco, Alessandro; Zavala, Jesús
- Physical Review D, Vol. 94, Issue 12
Detection of Lensing Substructure Using alma Observations of the Dusty Galaxy Sdp.81
journal, May 2016
- Hezaveh, Yashar D.; Dalal, Neal; Marrone, Daniel P.
- The Astrophysical Journal, Vol. 823, Issue 1
Sommerfeld enhancements for thermal relic dark matter
journal, October 2010
- Feng, Jonathan L.; Kaplinghat, Manoj; Yu, Hai-Bo
- Physical Review D, Vol. 82, Issue 8
Sommerfeld-enhanced -factors for dwarf spheroidal galaxies
journal, June 2017
- Boddy, Kimberly K.; Kumar, Jason; Strigari, Louis E.
- Physical Review D, Vol. 95, Issue 12
A unified model for the spatial and mass distribution of subhaloes
journal, February 2016
- Han, Jiaxin; Cole, Shaun; Frenk, Carlos S.
- Monthly Notices of the Royal Astronomical Society, Vol. 457, Issue 2
Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi Large Area Telescope Data
journal, November 2015
- Ackermann, M.; Albert, A.; Anderson, B.
- Physical Review Letters, Vol. 115, Issue 23
Wimp searches with gamma rays in the Fermi era: Challenges, methods and results
journal, December 2015
- Conrad, J.; Cohen-Tanugi, J.; Strigari, L. E.
- Journal of Experimental and Theoretical Physics, Vol. 121, Issue 6
Anatomy of Eddington-like inversion methods in the context of dark matter searches
journal, September 2018
- Lacroix, Thomas; Stref, Martin; Lavalle, Julien
- Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 09
The Origin of the Extragalactic Gamma-Ray Background and Implications for dark Matter Annihilation
journal, February 2015
- Ajello, M.; Gasparrini, D.; Sánchez-Conde, M.
- The Astrophysical Journal, Vol. 800, Issue 2
Stellar Velocity Dispersion: Linking Quiescent Galaxies to Their Dark Matter Halos
journal, May 2018
- Zahid, H. Jabran; Sohn, Jubee; Geller, Margaret J.
- The Astrophysical Journal, Vol. 859, Issue 2
Matrix element analyses of dark matter scattering and annihilation
journal, July 2013
- Kumar, Jason; Marfatia, Danny
- Physical Review D, Vol. 88, Issue 1
SEARCH FOR DARK MATTER SATELLITES USING FERMI -LAT
journal, February 2012
- Ackermann, M.; Albert, A.; Baldini, L.
- The Astrophysical Journal, Vol. 747, Issue 2
The Aquarius Project: the subhaloes of galactic haloes
journal, December 2008
- Springel, V.; Wang, J.; Vogelsberger, M.
- Monthly Notices of the Royal Astronomical Society, Vol. 391, Issue 4
The impact of the phase-space density on the indirect detection of dark matter
journal, September 2013
- Ferrer, Francesc; Hunter, Daniel R.
- Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 09
On velocity-dependent dark matter annihilations in dwarf satellites
journal, December 2018
- Petač, Mihael; Ullio, Piero; Valli, Mauro
- Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 12
Observing small-scale γ-ray anisotropies with the Cherenkov Telescope Array
journal, August 2018
- Hütten, M.; Maier, G.
- Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 08
Comprehensive search for dark matter annihilation in dwarf galaxies
journal, April 2015
- Geringer-Sameth, Alex; Koushiappas, Savvas M.; Walker, Matthew G.
- Physical Review D, Vol. 91, Issue 8
Scalar dark matter models with significant internal bremsstrahlung
journal, October 2013
- Giacchino, Federica; Lopez-Honorez, Laura; Tytgat, Michel H. G.
- Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 10