Effective J-factor of the Galactic Center for velocity-dependent dark matter annihilation

Boddy, Kimberly K.; Kumar, Jason; Strigari, Louis E.

doi:10.1103/PhysRevD.98.063012

Title: Effective $J$ -factor of the Galactic Center for velocity-dependent dark matter annihilation

Journal Article · 19 September 2018 · Physical Review D

DOI: https://doi.org/10.1103/PhysRevD.98.063012 · OSTI ID:1598042

Boddy, Kimberly K. ^[1]; Kumar, Jason ^[2]; Strigari, Louis E. ^[3]

Johns Hopkins Univ., Baltimore, MD (United States); UH High Energy Physics Group
Univ. of Hawaii, Honolulu, HI (United States)
Texas A & M Univ., College Station, TX (United States)

Here, we introduce the effective $J$ -factors for the Milky Way for scenarios in which dark matter annihilation is $p$ -wave or $d$ -wave suppressed. We find that the velocity suppression of dark matter annihilation can have a sizable effect on the morphology of a potential dark matter annihilation signal in the Galactic Center. The gamma-ray flux from the innermost region of the Galactic Center is in particular suppressed. We discover that for dark matter density profiles with steep inner slopes, the morphology of the inner Galaxy gamma-ray emission in $p$ -wave models can be made similar to the morphology in standard $s$ -wave models. This similarity may suggest that model discrimination between $s$ wave and $p$ wave is challenging, e.g., when fitting the Galactic Center excess. However, we show that it is difficult to simultaneously match $s$ - and $p$ -wave morphologies at both large and small angular scales. The $J$ -factors we calculate may be implemented with astrophysical foreground models to self-consistently determine the morphology of the excess with velocity-suppressed dark matter annihilation.

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Research Organization:: Texas A & M Univ., College Station, TX (United States); Univ. of Hawaii, Honolulu, HI (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Grant/Contract Number:: SC0010504; SC0010813

OSTI ID:: 1598042

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 6 Vol. 98; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (47)

The characterization of the gamma-ray signal from the central Milky Way: A case for annihilating dark matter Daylan, Tansu; Finkbeiner, Douglas P.; Hooper, Dan Physics of the Dark Universe, Vol. 12 https://doi.org/10.1016/j.dark.2015.12.005	journal	June 2016
Dark matter annihilation in the Galactic Center as seen by the Fermi Gamma Ray Space Telescope Hooper, Dan; Goodenough, Lisa Physics Letters B, Vol. 697, Issue 5 https://doi.org/10.1016/j.physletb.2011.02.029	journal	March 2011
The local dark matter density Read, J. I. Journal of Physics G: Nuclear and Particle Physics, Vol. 41, Issue 6 https://doi.org/10.1088/0954-3899/41/6/063101	journal	May 2014
Reconstructing WIMP properties in direct detection experiments including galactic dark matter distribution uncertainties Strigari, Louis E.; Trotta, Roberto Journal of Cosmology and Astroparticle Physics, Vol. 2009, Issue 11 https://doi.org/10.1088/1475-7516/2009/11/019	journal	November 2009
Dark matter direct detection signals inferred from a cosmological N-body simulation with baryons Ling, F. -S; Nezri, E.; Athanassoula, E. Journal of Cosmology and Astroparticle Physics, Vol. 2010, Issue 02 https://doi.org/10.1088/1475-7516/2010/02/012	journal	February 2010
The consistency of Fermi-LAT observations of the galactic center with a millisecond pulsar population in the central stellar cluster Abazajian, Kevork N. Journal of Cosmology and Astroparticle Physics, Vol. 2011, Issue 03 https://doi.org/10.1088/1475-7516/2011/03/010	journal	March 2011
Taming astrophysical bias in direct dark matter searches Pato, Miguel; Strigari, Louis E.; Trotta, Roberto Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 02 https://doi.org/10.1088/1475-7516/2013/02/041	journal	February 2013
The impact of the phase-space density on the indirect detection of dark matter Ferrer, Francesc; Hunter, Daniel R. Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 09 https://doi.org/10.1088/1475-7516/2013/09/005	journal	September 2013
Scalar dark matter models with significant internal bremsstrahlung Giacchino, Federica; Lopez-Honorez, Laura; Tytgat, Michel H. G. Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 10 https://doi.org/10.1088/1475-7516/2013/10/025	journal	October 2013
Galactic Center gamma-ray ``excess'' from an active past of the Galactic Centre? Petrović, Jovana; Serpico, Pasquale Dario; Zaharijaš, Gabrijela Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 10 https://doi.org/10.1088/1475-7516/2014/10/052	journal	October 2014
Background model systematics for the Fermi GeV excess Calore, Francesca; Cholis, Ilias; Weniger, Christoph Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 03 https://doi.org/10.1088/1475-7516/2015/03/038	journal	March 2015
Dynamical constraints on the dark matter distribution in the Milky Way Pato, Miguel; Iocco, Fabio; Bertone, Gianfranco Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 12 https://doi.org/10.1088/1475-7516/2015/12/001	journal	December 2015
The Galactic Center GeV excess from a series of leptonic cosmic-ray outbursts Cholis, Ilias; Evoli, Carmelo; Calore, Francesca Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 12 https://doi.org/10.1088/1475-7516/2015/12/005	journal	December 2015
Towards a realistic astrophysical interpretation of the gamma-ray Galactic center excess Gaggero, Daniele; Taoso, Marco; Urbano, Alfredo Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 12 https://doi.org/10.1088/1475-7516/2015/12/056	journal	December 2015
Simulated Milky Way analogues: implications for dark matter direct searches Bozorgnia, Nassim; Calore, Francesca; Schaller, Matthieu Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 05 https://doi.org/10.1088/1475-7516/2016/05/024	journal	May 2016
A theory of dark matter Arkani-Hamed, Nima; Finkbeiner, Douglas P.; Slatyer, Tracy R. Physical Review D, Vol. 79, Issue 1 https://doi.org/10.1103/PhysRevD.79.015014	journal	January 2009
Dark matter annihilation rates with velocity-dependent annihilation cross sections Robertson, Brant E.; Zentner, Andrew R. Physical Review D, Vol. 79, Issue 8 https://doi.org/10.1103/PhysRevD.79.083525	journal	April 2009
Extracting limits on dark matter annihilation from gamma ray observations towards dwarf spheroidal galaxies Cholis, Ilias; Salucci, Paolo Physical Review D, Vol. 86, Issue 2 https://doi.org/10.1103/PhysRevD.86.023528	journal	July 2012
Detection of a gamma-ray source in the Galactic Center consistent with extended emission from dark matter annihilation and concentrated astrophysical emission Abazajian, Kevork N.; Kaplinghat, Manoj Physical Review D, Vol. 86, Issue 8 https://doi.org/10.1103/PhysRevD.86.083511	journal	October 2012
Erratum: Detection of a gamma-ray source in the Galactic Center consistent with extended emission from dark matter annihilation and concentrated astrophysical emission [Phys. Rev. D 86 , 083511 (2012)] Abazajian, Kevork N.; Kaplinghat, Manoj Physical Review D, Vol. 87, Issue 12 https://doi.org/10.1103/PhysRevD.87.129902	journal	June 2013
Matrix element analyses of dark matter scattering and annihilation Kumar, Jason; Marfatia, Danny Physical Review D, Vol. 88, Issue 1 https://doi.org/10.1103/PhysRevD.88.014035	journal	July 2013
A tale of tails: Dark matter interpretations of the Fermi GeV excess in light of background model systematics Calore, Francesca; Cholis, Ilias; McCabe, Christopher Physical Review D, Vol. 91, Issue 6 https://doi.org/10.1103/PhysRevD.91.063003	journal	March 2015
Dark matter interpretation of the Fermi -LAT observation toward the Galactic Center Karwin, Christopher; Murgia, Simona; Tait, Tim M. P. Physical Review D, Vol. 95, Issue 10 https://doi.org/10.1103/PhysRevD.95.103005	journal	May 2017
Sommerfeld-enhanced J -factors for dwarf spheroidal galaxies Boddy, Kimberly K.; Kumar, Jason; Strigari, Louis E. Physical Review D, Vol. 95, Issue 12 https://doi.org/10.1103/PhysRevD.95.123008	journal	June 2017
J -factors for self-interacting dark matter in 20 dwarf spheroidal galaxies Bergström, Sebastian; Catena, Riccardo; Chiappo, Andrea Physical Review D, Vol. 98, Issue 4 https://doi.org/10.1103/PhysRevD.98.043017	journal	August 2018
Strong Support for the Millisecond Pulsar Origin of the Galactic Center GeV Excess Bartels, Richard; Krishnamurthy, Suraj; Weniger, Christoph Physical Review Letters, Vol. 116, Issue 5 https://doi.org/10.1103/PhysRevLett.116.051102	journal	February 2016
Evidence for Unresolved γ -Ray Point Sources in the Inner Galaxy Lee, Samuel K.; Lisanti, Mariangela; Safdi, Benjamin R. Physical Review Letters, Vol. 116, Issue 5 https://doi.org/10.1103/PhysRevLett.116.051103	journal	February 2016
Selection Rule for Enhanced Dark Matter Annihilation Das, Anirban; Dasgupta, Basudeb Physical Review Letters, Vol. 118, Issue 25 https://doi.org/10.1103/PhysRevLett.118.251101	journal	June 2017
Mass models of the Milky Way: Mass models of the Milky Way McMillan, Paul J. Monthly Notices of the Royal Astronomical Society, Vol. 414, Issue 3 https://doi.org/10.1111/j.1365-2966.2011.18564.x	journal	April 2011
The Galaxy in Context: Structural, Kinematic, and Integrated Properties Bland-Hawthorn, Joss; Gerhard, Ortwin Annual Review of Astronomy and Astrophysics, Vol. 54, Issue 1 https://doi.org/10.1146/annurev-astro-081915-023441	journal	September 2016
FERMI -LAT OBSERVATIONS OF HIGH-ENERGY γ -RAY EMISSION TOWARD THE GALACTIC CENTER Ajello, M.; Albert, A.; Atwood, W. B. The Astrophysical Journal, Vol. 819, Issue 1 https://doi.org/10.3847/0004-637X/819/1/44	journal	February 2016
The Fermi Galactic Center GeV Excess and Implications for Dark Matter Ackermann, M.; Ajello, M.; Albert, A. The Astrophysical Journal, Vol. 840, Issue 1 https://doi.org/10.3847/1538-4357/aa6cab	journal	May 2017
A Theory of Dark Matter Arkani-Hamed, Nima; Finkbeiner, Douglas P.; Slatyer, Tracy R. arXiv https://doi.org/10.48550/arxiv.0810.0713	text	January 2008
Reconstructing WIMP Properties in Direct Detection Experiments Including Galactic Dark Matter Distribution Uncertainties Strigari, Louis E.; Trotta, Roberto arXiv https://doi.org/10.48550/arxiv.0906.5361	text	January 2009
The Consistency of Fermi-LAT Observations of the Galactic Center with a Millisecond Pulsar Population in the Central Stellar Cluster Abazajian, Kevork N. arXiv https://doi.org/10.48550/arxiv.1011.4275	text	January 2010
Extracting limits on Dark Matter annihilation from gamma-ray observations towards dwarf spheroidal galaxies Cholis, Ilias; Salucci, Paolo arXiv https://doi.org/10.48550/arxiv.1203.2954	text	January 2012
Detection of a Gamma-Ray Source in the Galactic Center Consistent with Extended Emission from Dark Matter Annihilation and Concentrated Astrophysical Emission Abazajian, Kevork N.; Kaplinghat, Manoj arXiv https://doi.org/10.48550/arxiv.1207.6047	text	January 2012
Matrix element analyses of dark matter scattering and annihilation Kumar, Jason; Marfatia, Danny arXiv https://doi.org/10.48550/arxiv.1305.1611	text	January 2013
The impact of the phase-space density on the indirect detection of dark matter Ferrer, Francesc; Hunter, Daniel R. arXiv https://doi.org/10.48550/arxiv.1306.6586	text	January 2013
Scalar Dark Matter Models with Significant Internal Bremsstrahlung Giacchino, Federica; Lopez-Honorez, Laura; Tytgat, Michel H. G. arXiv https://doi.org/10.48550/arxiv.1307.6480	text	January 2013
The Local Dark Matter Density Read, J. I. arXiv https://doi.org/10.48550/arxiv.1404.1938	text	January 2014
Background model systematics for the Fermi GeV excess Calore, Francesca; Cholis, Ilias; Weniger, Christoph arXiv https://doi.org/10.48550/arxiv.1409.0042	text	January 2014
Dynamical constraints on the dark matter distribution in the Milky Way Pato, Miguel; Iocco, Fabio; Bertone, Gianfranco arXiv https://doi.org/10.48550/arxiv.1504.06324	text	January 2015
The Galactic Center GeV Excess from a Series of Leptonic Cosmic-Ray Outbursts Cholis, Ilias; Evoli, Carmelo; Calore, Francesca arXiv https://doi.org/10.48550/arxiv.1506.05119	text	January 2015
The Galaxy in Context: Structural, Kinematic and Integrated Properties Bland-Hawthorn, Joss; Gerhard, Ortwin arXiv https://doi.org/10.48550/arxiv.1602.07702	text	January 2016
Sommerfeld-Enhanced $J$-Factors For Dwarf Spheroidal Galaxies Boddy, Kimberly K.; Kumar, Jason; Strigari, Louis E. arXiv https://doi.org/10.48550/arxiv.1702.00408	text	January 2017
Dark matter direct detection signals inferred from a cosmological N-body simulation with baryons Ling, F. S.; Nezri, E.; Athanassoula, E. Institute of Physics Publishing https://doi.org/10.5167/uzh-34435	text	January 2010

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