Publication:
The Fermi Galactic Center GeV Excess and Implications for Dark Matter

Issued Date

2017-05-01

Resource Type

Article

ISSN

15384357
0004637X

DOI

10.3847/1538-4357/aa6cab

Other identifier(s)

2-s2.0-85019104376

Rights

Mahidol University

Rights Holder(s)

SCOPUS

Bibliographic Citation

Astrophysical Journal. Vol.840, No.1 (2017)

Suggested Citation

M. Ackermann, M. Ajello, A. Albert, W. B. Atwood, L. Baldini, J. Ballet, G. Barbiellini, D. Bastieri, R. Bellazzini, E. Bissaldi, R. D. Blandford, E. D. Bloom, R. Bonino, E. Bottacini, T. J. Brandt, J. Bregeon, P. Bruel, R. Buehler, T. H. Burnett, R. A. Cameron, R. Caputo, M. Caragiulo, P. A. Caraveo, E. Cavazzuti, C. Cecchi, E. Charles, A. Chekhtman, J. Chiang, A. Chiappo, G. Chiaro, S. Ciprini, J. Conrad, F. Costanza, A. Cuoco, S. Cutini, F. D'Ammando, F. De Palma, R. Desiante, S. W. Digel, N. Di Lalla, M. Di Mauro, L. Di Venere, P. S. Drell, C. Favuzzi, S. J. Fegan, E. C. Ferrara, W. B. Focke, A. Franckowiak, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, D. Gasparrini, N. Giglietto, F. Giordano, M. Giroletti, T. Glanzman, G. A. Gomez-Vargas, D. Green, I. A. Grenier, J. E. Grove, L. Guillemot, S. Guiriec, M. Gustafsson, A. K. Harding, E. Hays, J. W. Hewitt, D. Horan, T. Jogler, A. S. Johnson, T. Kamae, D. Kocevski, M. Kuss, G. La Mura, S. Larsson The Fermi Galactic Center GeV Excess and Implications for Dark Matter. Astrophysical Journal. Vol.840, No.1 (2017). doi:10.3847/1538-4357/aa6cab Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/42480

Research Projects

Organizational Units

Authors

Journal Issue

Thesis

Title

The Fermi Galactic Center GeV Excess and Implications for Dark Matter

Author(s)

M. Ackermann
 M. Ajello
 A. Albert
 W. B. Atwood
 L. Baldini
 J. Ballet
 G. Barbiellini
 D. Bastieri
 R. Bellazzini
 E. Bissaldi
 R. D. Blandford
 E. D. Bloom
 R. Bonino
 E. Bottacini
 T. J. Brandt
 J. Bregeon
 P. Bruel
 R. Buehler
 T. H. Burnett
 R. A. Cameron
 R. Caputo
 M. Caragiulo
 P. A. Caraveo
 E. Cavazzuti
 C. Cecchi
 E. Charles
 A. Chekhtman
 J. Chiang
 A. Chiappo
 G. Chiaro
 S. Ciprini
 J. Conrad
 F. Costanza
 A. Cuoco
 S. Cutini
 F. D'Ammando
 F. De Palma
 R. Desiante
 S. W. Digel
 N. Di Lalla
 M. Di Mauro
 L. Di Venere
 P. S. Drell
 C. Favuzzi
 S. J. Fegan
 E. C. Ferrara
 W. B. Focke
 A. Franckowiak
 Y. Fukazawa
 S. Funk
 P. Fusco
 F. Gargano
 D. Gasparrini
 N. Giglietto
 F. Giordano
 M. Giroletti
 T. Glanzman
 G. A. Gomez-Vargas
 D. Green
 I. A. Grenier
 J. E. Grove
 L. Guillemot
 S. Guiriec
 M. Gustafsson
 A. K. Harding
 E. Hays
 J. W. Hewitt
 D. Horan
 T. Jogler
 A. S. Johnson
 T. Kamae
 D. Kocevski
 M. Kuss
 G. La Mura
 S. Larsson

Other Contributor(s)

Deutsche Elektronen-Synchrotron
 Clemson University
 Los Alamos National Laboratory
 Santa Cruz Institute for Particle Physics
 Università di Pisa
 Institut de Recherche sur les Lois Fondamentales de l'Univers
 Istituto Nazionale di Fisica Nucleare, Roma
 Università degli Studi di Trieste
 Istituto Nazionale Di Fisica Nucleare, Sezione di Padova
 Università degli Studi di Padova
 Istituto Nazionale Di Fisica Nucleare, Sezione di Pisa
 Kavli Institute for Particle Astrophysics and Cosmology
 Università degli Studi di Torino
 NASA Goddard Space Flight Center
 Laboratoire Univers et Particules de Montpellier
 Laboratoire Leprince-Ringuet
 University of Washington, Seattle
 Università degli Studi di Bari
 INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
 Agenzia Spaziale Italiana
 Università degli Studi di Perugia
 George Mason University, Fairfax Campus
 Stockholms universitet
 Oskar Klein Centre for Cosmoparticle Physics
 Rheinisch-Westfälische Technische Hochschule Aachen
 Istituto Di Radioastronomia, Bologna
 Alma Mater Studiorum Università di Bologna
 Università degli Studi di Napoli Federico II
 Università degli Studi di Udine
 Hiroshima University
 Erlangen Centre for Astroparticle Physics
 Pontificia Universidad Católica de Chile
 University of Maryland
 Naval Research Laboratory
 Universite d'Orleans
 Institut National des Sciences de l'Univers
 Universität Göttingen
 University of North Florida
 Friedrich-Alexander-Universität Erlangen-Nürnberg
 University of Tokyo
 The Royal Institute of Technology (KTH)
 Universitat Autònoma de Barcelona
 CNRS Centre National de la Recherche Scientifique
 Mahidol University
 University of Denver

Abstract

© 2017. The American Astronomical Society. All rights reserved.. The region around the Galactic Center (GC) is now well established to be brighter at energies of a few GeV than what is expected from conventional models of diffuse gamma-ray emission and catalogs of known gamma-ray sources. We study the GeV excess using 6.5 yr of data from the Fermi Large Area Telescope. We characterize the uncertainty of the GC excess spectrum and morphology due to uncertainties in cosmic-ray source distributions and propagation, uncertainties in the distribution of interstellar gas in the Milky Way, and uncertainties due to a potential contribution from the Fermi bubbles. We also evaluate uncertainties in the excess properties due to resolved point sources of gamma rays. The GC is of particular interest, as it would be expected to have the brightest signal from annihilation of weakly interacting massive dark matter (DM) particles. However, control regions along the Galactic plane, where a DM signal is not expected, show excesses of similar amplitude relative to the local background. Based on the magnitude of the systematic uncertainties, we conservatively report upper limits for the annihilation cross-section as a function of particle mass and annihilation channel.

Keyword(s)

Earth and Planetary Sciences

Availability

URI

https://repository.li.mahidol.ac.th/handle/20.500.14594/42480

Collections

Scopus 2016-2017