Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess
Abstract
Statistical evidence has previously implied that the galactic center GeV excess (GCE) originates largely from point sources, and not from annihilating dark matter. Here, we examine the impact of unmodeled source populations on identifying the true origin of the GCE using non-Poissonian template fitting (NPTF) methods. In a proof-of-principle example with simulated data, we discover that unmodeled sources in the Fermi bubbles can lead to a dark matter signal being misattributed to point sources by the NPTF. We discover striking behavior consistent with a mismodeling effect in the real Fermi data, finding that large artificial injected dark matter signals are completely misattributed to point sources. Consequently, we conclude that dark matter may provide a dominant contribution to the GCE after all.
- Authors:
-
[1];
[2]
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics; Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- DESY Theory Group; Princeton Institute for Advanced Study
- OSTI Identifier:
- 1596610
- Report Number(s):
- MIT-CTP-5104
Journal ID: ISSN 0031-9007; PRLTAO; arXiv:1904.08430
- Grant/Contract Number:
- SC0013999; SC00012567
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 123; Journal Issue: 24; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; gamma ray astronomy; particle dark matter
Citation Formats
Leane, Rebecca K., and Slatyer, Tracy R. Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess. United States: N. p., 2019.
Web. doi:10.1103/PhysRevLett.123.241101.
Leane, Rebecca K., & Slatyer, Tracy R. Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess. United States. doi:https://doi.org/10.1103/PhysRevLett.123.241101
Leane, Rebecca K., and Slatyer, Tracy R. Wed .
"Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess". United States. doi:https://doi.org/10.1103/PhysRevLett.123.241101. https://www.osti.gov/servlets/purl/1596610.
@article{osti_1596610,
title = {Revival of the Dark Matter Hypothesis for the Galactic Center Gamma-Ray Excess},
author = {Leane, Rebecca K. and Slatyer, Tracy R.},
abstractNote = {Statistical evidence has previously implied that the galactic center GeV excess (GCE) originates largely from point sources, and not from annihilating dark matter. Here, we examine the impact of unmodeled source populations on identifying the true origin of the GCE using non-Poissonian template fitting (NPTF) methods. In a proof-of-principle example with simulated data, we discover that unmodeled sources in the Fermi bubbles can lead to a dark matter signal being misattributed to point sources by the NPTF. We discover striking behavior consistent with a mismodeling effect in the real Fermi data, finding that large artificial injected dark matter signals are completely misattributed to point sources. Consequently, we conclude that dark matter may provide a dominant contribution to the GCE after all.},
doi = {10.1103/PhysRevLett.123.241101},
journal = {Physical Review Letters},
number = 24,
volume = 123,
place = {United States},
year = {2019},
month = {12}
}
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Works referenced in this record:
Dark matter annihilation in the Galactic Center as seen by the Fermi Gamma Ray Space Telescope
journal, March 2011
- Hooper, Dan; Goodenough, Lisa
- Physics Letters B, Vol. 697, Issue 5
Origin of the gamma rays from the Galactic Center
journal, December 2011
- Hooper, Dan; Linden, Tim
- Physical Review D, Vol. 84, Issue 12
Two emission mechanisms in the Fermi Bubbles: A possible signal of annihilating dark matter
journal, September 2013
- Hooper, Dan; Slatyer, Tracy R.
- Physics of the Dark Universe, Vol. 2, Issue 3
The characterization of the gamma-ray signal from the central Milky Way: A case for annihilating dark matter
journal, June 2016
- Daylan, Tansu; Finkbeiner, Douglas P.; Hooper, Dan
- Physics of the Dark Universe, Vol. 12
Background model systematics for the Fermi GeV excess
journal, March 2015
- Calore, Francesca; Cholis, Ilias; Weniger, Christoph
- Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 03
FERMI -LAT OBSERVATIONS OF HIGH-ENERGY γ -RAY EMISSION TOWARD THE GALACTIC CENTER
journal, February 2016
- Ajello, M.; Albert, A.; Atwood, W. B.
- The Astrophysical Journal, Vol. 819, Issue 1
Astrophysical and dark matter interpretations of extended gamma-ray emission from the Galactic Center
journal, July 2014
- Abazajian, Kevork N.; Canac, Nicolas; Horiuchi, Shunsaku
- Physical Review D, Vol. 90, Issue 2
Detection of a gamma-ray source in the Galactic Center consistent with extended emission from dark matter annihilation and concentrated astrophysical emission
journal, October 2012
- Abazajian, Kevork N.; Kaplinghat, Manoj
- Physical Review D, Vol. 86, Issue 8
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)]
journal, June 2013
- Abazajian, Kevork N.; Kaplinghat, Manoj
- Physical Review D, Vol. 87, Issue 12
Millisecond pulsars cannot account for the inner Galaxy’s GeV excess
journal, October 2013
- Hooper, Dan; Cholis, Ilias; Linden, Tim
- Physical Review D, Vol. 88, Issue 8
Dark matter versus pulsars: catching the impostor
journal, October 2013
- Mirabal, N.
- Monthly Notices of the Royal Astronomical Society, Vol. 436, Issue 3
Diffuse γ-Ray Emission from Galactic Pulsars
journal, October 2014
- Calore, F.; Di Mauro, M.; Donato, F.
- The Astrophysical Journal, Vol. 796, Issue 1
Challenges in explaining the Galactic Center gamma-ray excess with millisecond pulsars
journal, June 2015
- Cholis, Ilias; Hooper, Dan; Linden, Tim
- Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 06
Testing the Millisecond Pulsar Scenario of the Galactic Center Gamma-Ray Excess with very high Energy Gamma-Rays
journal, April 2015
- Yuan, Qiang; Ioka, Kunihito
- The Astrophysical Journal, Vol. 802, Issue 2
Consistency between the luminosity function of resolved millisecond pulsars and the galactic center excess
journal, August 2017
- Ploeg, Harrison; Gordon, Chris; Crocker, Roland
- Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 08
Millisecond pulsars, TeV halos, and implications for the Galactic Center gamma-ray excess
journal, August 2018
- Hooper, Dan; Linden, Tim
- Physical Review D, Vol. 98, Issue 4
Bayesian model comparison and analysis of the Galactic disc population of gamma-ray millisecond pulsars
journal, September 2018
- Bartels, R. T.; Edwards, T. D. P.; Weniger, C.
- Monthly Notices of the Royal Astronomical Society, Vol. 481, Issue 3
Galactic binaries can explain the Fermi Galactic centre excess and 511 keV emission
journal, August 2018
- Bartels, R.; Calore, F.; Storm, E.
- Monthly Notices of the Royal Astronomical Society, Vol. 480, Issue 3
Galactic Center gamma-ray ``excess'' from an active past of the Galactic Centre?
journal, October 2014
- Petrović, Jovana; Serpico, Pasquale Dario; Zaharijaš, Gabrijela
- Journal of Cosmology and Astroparticle Physics, Vol. 2014, Issue 10
Cosmic ray protons in the inner Galaxy and the Galactic Center gamma-ray excess
journal, July 2014
- Carlson, Eric; Profumo, Stefano
- Physical Review D, Vol. 90, Issue 2
The Galactic Center GeV excess from a series of leptonic cosmic-ray outbursts
journal, December 2015
- Cholis, Ilias; Evoli, Carmelo; Calore, Francesca
- Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 12
Dark matter interpretation of the Fermi -LAT observation toward the Galactic Center
journal, May 2017
- Karwin, Christopher; Murgia, Simona; Tait, Tim M. P.
- Physical Review D, Vol. 95, Issue 10
STATISTICS OF GAMMA-RAY POINT SOURCES BELOW THE FERMI DETECTION LIMIT
journal, August 2011
- Malyshev, Dmitry; Hogg, David W.
- The Astrophysical Journal, Vol. 738, Issue 2
Distinguishing dark matter from unresolved point sources in the Inner Galaxy with photon statistics
journal, May 2015
- Lee, Samuel K.; Lisanti, Mariangela; Safdi, Benjamin R.
- Journal of Cosmology and Astroparticle Physics, Vol. 2015, Issue 05
Point sources from dissipative dark matter
journal, December 2017
- Agrawal, Prateek; Randall, Lisa
- Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 12
Evidence for Unresolved -Ray Point Sources in the Inner Galaxy
journal, February 2016
- Lee, Samuel K.; Lisanti, Mariangela; Safdi, Benjamin R.
- Physical Review Letters, Vol. 116, Issue 5
Strong Support for the Millisecond Pulsar Origin of the Galactic Center GeV Excess
journal, February 2016
- Bartels, Richard; Krishnamurthy, Suraj; Weniger, Christoph
- Physical Review Letters, Vol. 116, Issue 5
Analyzing the gamma-ray sky with wavelets
journal, August 2018
- Balaji, Bhaskaran; Cholis, Ilias; Fox, Patrick J.
- Physical Review D, Vol. 98, Issue 4
NPTFit : A Code Package for Non-Poissonian Template Fitting
journal, May 2017
- Mishra-Sharma, Siddharth; Rodd, Nicholas L.; Safdi, Benjamin R.
- The Astronomical Journal, Vol. 153, Issue 6
MultiNest: an efficient and robust Bayesian inference tool for cosmology and particle physics
journal, October 2009
- Feroz, F.; Hobson, M. P.; Bridges, M.
- Monthly Notices of the Royal Astronomical Society, Vol. 398, Issue 4
FERMI LARGE AREA TELESCOPE THIRD SOURCE CATALOG
journal, June 2015
- Acero, F.; Ackermann, M.; Ajello, M.
- The Astrophysical Journal Supplement Series, Vol. 218, Issue 2
The Structure of Cold Dark Matter Halos
journal, May 1996
- Navarro, Julio F.; Frenk, Carlos S.; White, Simon D. M.
- The Astrophysical Journal, Vol. 462
Blowing in the Milky Way Wind: Neutral Hydrogen Clouds Tracing the Galactic Nuclear Outflow
journal, March 2018
- Di Teodoro, Enrico M.; McClure-Griffiths, N. M.; Lockman, Felix J.
- The Astrophysical Journal, Vol. 855, Issue 1
Radio Detection Prospects for a Bulge Population of Millisecond Pulsars as Suggested by Fermi-Lat Observations of the Inner Galaxy
journal, August 2016
- Calore, F.; Mauro, M. Di; Donato, F.
- The Astrophysical Journal, Vol. 827, Issue 2
SkyFACT: high-dimensional modeling of gamma-ray emission with adaptive templates and penalized likelihoods
journal, August 2017
- Storm, Emma; Weniger, Christoph; Calore, Francesca
- Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 08
Galactic bulge preferred over dark matter for the Galactic centre gamma-ray excess
journal, March 2018
- Macias, Oscar; Gordon, Chris; Crocker, Roland M.
- Nature Astronomy, Vol. 2, Issue 5
UNVEILING THE GAMMA-RAY SOURCE COUNT DISTRIBUTION BELOW THE FERMI DETECTION LIMIT WITH PHOTON STATISTICS
journal, July 2016
- Zechlin, Hannes-S.; Cuoco, Alessandro; Donato, Fiorenza
- The Astrophysical Journal Supplement Series, Vol. 225, Issue 2
Statistical Measurement of the Gamma-Ray Source-Count Distribution as a Function of Energy
journal, July 2016
- Zechlin, Hannes-S.; Cuoco, Alessandro; Donato, Fiorenza
- The Astrophysical Journal, Vol. 826, Issue 2
High-energy tail of the Galactic Center gamma-ray excess
journal, November 2016
- Linden, Tim; Rodd, Nicholas L.; Safdi, Benjamin R.
- Physical Review D, Vol. 94, Issue 10
DECIPHERING CONTRIBUTIONS TO THE EXTRAGALACTIC GAMMA-RAY BACKGROUND FROM 2 GeV TO 2 TeV
journal, November 2016
- Lisanti, Mariangela; Mishra-Sharma, Siddharth; Necib, Lina
- The Astrophysical Journal, Vol. 832, Issue 2
Comment on “Characterizing the population of pulsars in the Galactic bulge with the Fermi large area telescope” [arXiv:1705.00009v1]
journal, June 2018
- Bartels, Richard; Hooper, Dan; Linden, Tim
- Physics of the Dark Universe, Vol. 20
HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere
journal, April 2005
- Gorski, K. M.; Hivon, E.; Banday, A. J.
- The Astrophysical Journal, Vol. 622, Issue 2
Propagation of Cosmic‐Ray Nucleons in the Galaxy
journal, December 1998
- Strong, Andrew W.; Moskalenko, Igor V.
- The Astrophysical Journal, Vol. 509, Issue 1
GIANT GAMMA-RAY BUBBLES FROM FERMI -LAT: ACTIVE GALACTIC NUCLEUS ACTIVITY OR BIPOLAR GALACTIC WIND?
journal, November 2010
- Su, Meng; Slatyer, Tracy R.; Finkbeiner, Douglas P.
- The Astrophysical Journal, Vol. 724, Issue 2
THE SPECTRUM AND MORPHOLOGY OF THE FERMI BUBBLES
journal, September 2014
- Ackermann, M.; Albert, A.; Atwood, W. B.
- The Astrophysical Journal, Vol. 793, Issue 1
The Fermi-LAT GeV excess as a tracer of stellar mass in the Galactic bulge
journal, August 2018
- Bartels, Richard; Storm, Emma; Weniger, Christoph
- Nature Astronomy, Vol. 2, Issue 10
Strong evidence that the galactic bulge is shining in gamma rays
journal, September 2019
- Macias, Oscar; Horiuchi, Shunsaku; Kaplinghat, Manoj
- Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 09
Inverse Compton emission from millisecond pulsars in the Galactic bulge
journal, June 2019
- Song, Deheng; Macias, Oscar; Horiuchi, Shunsaku
- Physical Review D, Vol. 99, Issue 12
GeV excess in the Milky Way: The role of diffuse galactic gamma-ray emission templates
journal, June 2015
- Zhou, Bei; Liang, Yun-Feng; Huang, Xiaoyuan
- Physical Review D, Vol. 91, Issue 12
Cosmic-Ray Injection from Star-Forming Regions
journal, September 2016
- Carlson, Eric; Profumo, Stefano; Linden, Tim
- Physical Review Letters, Vol. 117, Issue 11
Improved cosmic-ray injection models and the Galactic Center gamma-ray excess
journal, September 2016
- Carlson, Eric; Linden, Tim; Profumo, Stefano
- Physical Review D, Vol. 94, Issue 6
Investigating the uniformity of the excess gamma rays towards the galactic center region
journal, November 2016
- Horiuchi, Shunsaku; Kaplinghat, Manoj; Kwa, Anna
- Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 11
The Fermi Galactic Center GeV Excess and Implications for Dark Matter
journal, May 2017
- Ackermann, M.; Ajello, M.; Albert, A.
- The Astrophysical Journal, Vol. 840, Issue 1