Search for Cosmic-Ray Electron and Positron Anisotropies with Seven Years of Fermi Large Area Telescope Data

Abdollahi, S.; Ackermann, M.; Ajello, M.; Albert, A.; Atwood, W. B.; Baldini, L.; Barbiellini, G.; Bellazzini, R.; Bissaldi, E.; Bloom, E. D.; Bonino, R.; Bottacini, E.; Brandt, T. J.; Bruel, P.; Buson, S.; Caragiulo, M.; Cavazzuti, E.; Chekhtman, A.; Ciprini, S.; Costanza, F.; Cuoco, A.; Cutini, S.; D’Ammando, F.; de Palma, F.; Desiante, R.; Digel, S. W.; Di Lalla, N.; Di Mauro, M.; Di Venere, L.; Donaggio, B.; Drell, P. S.; Favuzzi, C.; Focke, W. B.; Fukazawa, Y.; Funk, S.; Fusco, P.; Gargano, F.; Gasparrini, D.; Giglietto, N.; Giordano, F.; Giroletti, M.; Green, D.; Guiriec, S.; Harding, A. K.; Jogler, T.; Jóhannesson, G.; Kamae, T.; Kuss, M.; Larsson, S.; Latronico, L.; Li, J.; Longo, F.; Loparco, F.; Lubrano, P.; Magill, J. D.; Malyshev, D.; Manfreda, A.; Mazziotta, M. N.; Meehan, M.; Michelson, P. F.; Mitthumsiri, W.; Mizuno, T.; Moiseev, A. A.; Monzani, M. E.; Morselli, A.; Negro, M.; Nuss, E.; Ohsugi, T.; Omodei, N.; Paneque, D.; Perkins, J. S.; Pesce-Rollins, M.; Piron, F.; Pivato, G.; Principe, G.; Rainò, S.; Rando, R.; Razzano, M.; Reimer, A.; Reimer, O.; Sgrò, C.; Simone, D.; Siskind, E. J.; Spada, F.; Spandre, G.; Spinelli, P.; Strong, A. W.; Tajima, H.; Thayer, J. B.; Torres, D. F.; Troja, E.; Vandenbroucke, J.; Zaharijas, G.; Zimmer, S.

doi:10.1103/PhysRevLett.118.091103

Title: Search for Cosmic-Ray Electron and Positron Anisotropies with Seven Years of Fermi Large Area Telescope Data

Journal Article · Wed Mar 01 00:00:00 EST 2017 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.118.091103· OSTI ID:1355735

Abdollahi, S.; Ackermann, M.; Ajello, M.; Albert, A.; Atwood, W. B.; Baldini, L.; Barbiellini, G.; Bellazzini, R.; Bissaldi, E.; Bloom, E. D.; Bonino, R.; Bottacini, E.; Brandt, T. J.; Bruel, P.; Buson, S.; Caragiulo, M.; Cavazzuti, E.; Chekhtman, A.; Ciprini, S.; Costanza, F. more »

We present the Large Area Telescope on board the Fermi Gamma-ray Space Telescope that has collected the largest ever sample of high-energy cosmic-ray electron and positron events since the beginning of its operation. Potential anisotropies in the arrival directions of cosmic-ray electrons or positrons could be a signature of the presence of nearby sources. We use almost seven years of data with energies above 42 GeV processed with the Pass 8 reconstruction. The present data sample can probe dipole anisotropies down to a level of 10^-3. We take into account systematic effects that could mimic true anisotropies at this level. We present a detailed study of the event selection optimization of the cosmic-ray electrons and positrons to be used for anisotropy searches. Since no significant anisotropies have been detected on any angular scale, we present upper limits on the dipole anisotropy. Lastly, the present constraints are among the strongest to date probing the presence of nearby young and middle-aged sources.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Contributing Organization:: Fermi-LAT Collaboration

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1355735

Alternate ID(s):: OSTI ID: 1345441

Journal Information:: Physical Review Letters, Vol. 118, Issue 9; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 44 works

Citation information provided by
Web of Science

References (35)

Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station Aguilar, M.; Aisa, D.; Alpat, B. Physical Review Letters, Vol. 114, Issue 17 https://doi.org/10.1103/PhysRevLett.114.171103	journal	April 2015
THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION Atwood, W. B.; Abdo, A. A.; Ackermann, M. The Astrophysical Journal, Vol. 697, Issue 2 https://doi.org/10.1088/0004-637X/697/2/1071	journal	May 2009
Angular power spectra with finite counts Campbell, Sheldon S. Monthly Notices of the Royal Astronomical Society, Vol. 448, Issue 3 https://doi.org/10.1093/mnras/stv135	journal	March 2015
On possible interpretations of the high energy electron–positron spectrum measured by the Fermi Large Area Telescope Grasso, D.; Profumo, S.; Strong, A. W. Astroparticle Physics, Vol. 32, Issue 2 https://doi.org/10.1016/j.astropartphys.2009.07.003	journal	September 2009
Origin and Propagation of Cosmic-Ray Electrons Berkey, G. B.; Shen, C. S. Physical Review, Vol. 188, Issue 5 https://doi.org/10.1103/PhysRev.188.1994	journal	December 1969
Probing the Pulsar Origin of the Anomalous Positron Fraction with Ams-02 and Atmospheric Cherenkov Telescopes Linden, Tim; Profumo, Stefano The Astrophysical Journal, Vol. 772, Issue 1 https://doi.org/10.1088/0004-637X/772/1/18	journal	July 2013
Solar Modulation of Galactic Cosmic Rays Gleeson, L. J.; Axford, W. I. The Astrophysical Journal, Vol. 154 https://doi.org/10.1086/149822	journal	November 1968
Time-Average-Based Methods for Multi-Angular Scale Analysis of Cosmic-Ray data Iuppa, R.; Di Sciascio, G. The Astrophysical Journal, Vol. 766, Issue 2 https://doi.org/10.1088/0004-637X/766/2/96	journal	March 2013
An Apparent Effect of Galactic Rotation on the Intensity of Cosmic Rays Compton, Arthur H.; Getting, Ivan A. Physical Review, Vol. 47, Issue 11 https://doi.org/10.1103/PhysRev.47.817	journal	June 1935
HEALPix: A Framework for High‐Resolution Discretization and Fast Analysis of Data Distributed on the Sphere Gorski, K. M.; Hivon, E.; Banday, A. J. The Astrophysical Journal, Vol. 622, Issue 2 https://doi.org/10.1086/427976	journal	April 2005
Angular power spectrum of the diffuse gamma-ray emission as measured by the Fermi Large Area Telescope and constraints on its dark matter interpretation Fornasa, Mattia; Cuoco, Alessandro; Zavala, Jesús Physical Review D, Vol. 94, Issue 12 https://doi.org/10.1103/PhysRevD.94.123005	journal	December 2016
Analysis methods for results in gamma-ray astronomy Li, T. -P.; Ma, Y. -Q. The Astrophysical Journal, Vol. 272 https://doi.org/10.1086/161295	journal	September 1983
Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station Aguilar, M.; Aisa, D.; Alvino, A. Physical Review Letters, Vol. 113, Issue 12 https://doi.org/10.1103/PhysRevLett.113.121102	journal	September 2014
Cosmic-ray electron anisotropies as a tool to discriminate between exotic and astrophysical sources Cernuda, Ignacio Astroparticle Physics, Vol. 34, Issue 2 https://doi.org/10.1016/j.astropartphys.2010.05.003	journal	September 2010
Cosmic ray nuclei, antiprotons and gamma rays in the galaxy: a new diffusion model Evoli, Carmelo; Gaggero, Daniele; Grasso, Dario Journal of Cosmology and Astroparticle Physics, Vol. 2008, Issue 10 https://doi.org/10.1088/1475-7516/2008/10/018	journal	October 2008
Pulsars and Very High-Energy Cosmic-Ray Electrons Shen, C. S. The Astrophysical Journal, Vol. 162 https://doi.org/10.1086/180650	journal	November 1970
Measurement of Separate Cosmic-Ray Electron and Positron Spectra with the Fermi Large Area Telescope Ackermann, M.; Ajello, M.; Allafort, A. Physical Review Letters, Vol. 108, Issue 1 https://doi.org/10.1103/PhysRevLett.108.011103	journal	January 2012
Constraints on dark matter models from a Fermi LAT search for high-energy cosmic-ray electrons from the Sun Ajello, M.; Atwood, W. B.; Baldini, L. Physical Review D, Vol. 84, Issue 3 https://doi.org/10.1103/PhysRevD.84.032007	journal	August 2011
Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope Ackermann, M.; Ajello, M.; Atwood, W. B. Physical Review D, Vol. 82, Issue 9 https://doi.org/10.1103/PhysRevD.82.092003	journal	November 2010
Production of secondary particles and nuclei in cosmic rays collisions with the interstellar gas using the FLUKA code Mazziotta, M. N.; Cerutti, F.; Ferrari, A. Astroparticle Physics, Vol. 81 https://doi.org/10.1016/j.astropartphys.2016.04.005	journal	August 2016
Deciphering the Dipole Anisotropy of Galactic Cosmic Rays Ahlers, Markus Physical Review Letters, Vol. 117, Issue 15 https://doi.org/10.1103/PhysRevLett.117.151103	journal	October 2016
International Geomagnetic Reference Field: the 12th generation Thébault, Erwan; Finlay, Christopher C.; Beggan, Ciarán D. Earth, Planets and Space, Vol. 67, Issue 1 https://doi.org/10.1186/s40623-015-0228-9	journal	May 2015
Implications of the cosmic ray electron spectrum and anisotropy measured with Fermi-LAT Di Bernardo, Giuseppe; Evoli, Carmelo; Gaggero, Daniele Astroparticle Physics, Vol. 34, Issue 7 https://doi.org/10.1016/j.astropartphys.2010.11.005	journal	February 2011
Dark matter electron anisotropy: A universal upper limit Borriello, Enrico; Maccione, Luca; Cuoco, Alessandro Astroparticle Physics, Vol. 35, Issue 8 https://doi.org/10.1016/j.astropartphys.2011.12.001	journal	March 2012
Erratum: Cosmic-ray nuclei, antiprotons and gamma-rays in the galaxy: a new diffusion model Evoli, Carmelo; Gaggero, Daniele; Grasso, Dario Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 04 https://doi.org/10.1088/1475-7516/2016/04/E01	journal	April 2016
Dipole anisotropy in cosmic electrons and positrons: inspection on local sources Manconi, S.; Mauro, M. Di; Donato, F. Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 01 https://doi.org/10.1088/1475-7516/2017/01/006	journal	January 2017
Electron and Positron Fluxes in Primary Cosmic Rays Measured with the Alpha Magnetic Spectrometer on the International Space Station Zimmermann, Nikolas Proceedings of The European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2015) https://doi.org/10.22323/1.234.0400	conference	March 2016
Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station Aguilar, M.; Aisa, D.; Alpat, B. RWTH Aachen University https://doi.org/10.18154/rwth-2015-06052	text	January 2015
Cosmic-Ray Nuclei, Antiprotons and Gamma-rays in the Galaxy: a New Diffusion Model Evoli, C.; Gaggero, D.; Grasso, D. arXiv https://doi.org/10.48550/arxiv.0807.4730	text	January 2008
On possible interpretations of the high energy electron-positron spectrum measured by the Fermi Large Area Telescope Grasso, D.; Profumo, S.; Strong, A. W. arXiv https://doi.org/10.48550/arxiv.0905.0636	text	January 2009
Cosmic ray electron anisotropies as a tool to discriminate between exotic and astrophysical sources Cernuda, Ignacio arXiv https://doi.org/10.48550/arxiv.0905.1653	text	January 2009
Searches for Cosmic-Ray Electron Anisotropies with the Fermi Large Area Telescope Collaboration, The Fermi LAT arXiv https://doi.org/10.48550/arxiv.1008.5119	text	January 2010
Deciphering the Dipole Anisotropy of Galactic Cosmic Rays Ahlers, Markus arXiv https://doi.org/10.48550/arxiv.1605.06446	text	January 2016
Dipole anisotropy in cosmic electrons and positrons: inspection on local sources Manconi, Silvia; Di Mauro, Mattia; Donato, Fiorenza arXiv https://doi.org/10.48550/arxiv.1611.06237	text	January 2016
HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere Gorski, K. M.; Hivon, E.; Banday, A. J. arXiv https://doi.org/10.48550/arxiv.astro-ph/0409513	text	January 2004

Cited By (11)

Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons Collaboration, Dampe Nature, Vol. 552, Issue 7683, p. 63-66 https://doi.org/10.1038/nature24475	journal	November 2017
Dark matter indirect signals with long-lived mediators Chu, Xiaoyong; Kulkarni, Suchita; Salati, Pierre Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 11 https://doi.org/10.1088/1475-7516/2017/11/023	journal	November 2017
Theoretical Interpretation of Pass 8 Fermi -LAT e ⁺ + e ⁻ Data Di Mauro, M.; Manconi, S.; Vittino, A. The Astrophysical Journal, Vol. 845, Issue 2 https://doi.org/10.3847/1538-4357/aa8225	journal	August 2017
A Search for Cosmic-Ray Proton Anisotropy with the Fermi Large Area Telescope Ajello, M.; Baldini, L.; Barbiellini, G. The Astrophysical Journal, Vol. 883, Issue 1 https://doi.org/10.3847/1538-4357/ab3a2e	journal	September 2019
Consequences of Energetic Magnetar-like Outbursts of Nearby Neutron Stars: ¹⁴ C Events and the Cosmic Electron Spectrum Wang, F. Y.; Li, Xinyu; Chernyshov, D. O. The Astrophysical Journal, Vol. 887, Issue 2 https://doi.org/10.3847/1538-4357/ab55db	journal	December 2019
A Search for Cosmic-Ray Proton Anisotropy with the Fermi Large Area Telescope Ajello, M.; Baldini, L.; Barbiellini, G. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2020-00204	text	January 2019
A Search for Cosmic-Ray Proton Anisotropy with the Fermi Large Area Telescope Ajello, M. IOP https://doi.org/10.13016/m2dmrn-empu	collection	January 2019
Cosmic-ray electron-positron spectrum from 7 GeV to 2 TeV with the Fermi Large Area Telescope Mirabal, N.; Al., Et American Physical Society (APS) https://doi.org/10.13016/m2driy-nwxo	collection	January 2017
Dark matter indirect signals with long-lived mediators Chu, Xiaoyong; Kulkarni, Suchita; Salati, Pierre arXiv https://doi.org/10.48550/arxiv.1706.08543	text	January 2017
Direct detection of a break in the teraelectronvolt cosmic-ray spectrum of electrons and positrons Ambrosi, G.; An, Q.; Asfandiyarov, R. arXiv https://doi.org/10.48550/arxiv.1711.10981	text	January 2017
Consequences of Energetic Magnetar-Like Outbursts of Nearby Neutron Stars: $^{14}$C Events and the Cosmic Electron Spectrum Wang, F. Y.; Li, Xinyu; Chernyshov, D. O. arXiv https://doi.org/10.48550/arxiv.1911.03209	text	January 2019

Figures / Tables (3)

Figure 1(p. 5)

Figure 2(p. 5)

Figure 3(p. 6)

Similar Records

PROBING THE PULSAR ORIGIN OF THE ANOMALOUS POSITRON FRACTION WITH AMS-02 AND ATMOSPHERIC CHERENKOV TELESCOPES

Journal Article · Sat Jul 20 00:00:00 EDT 2013 · Astrophysical Journal · OSTI ID:1355735

Linden, Tim; Profumo, Stefano

Pulsars as the sources of high energy cosmic ray positrons

Journal Article · Thu Jan 15 00:00:00 EST 2009 · Journal of Cosmology and Astroparticle Physics · OSTI ID:1355735

Hooper, Dan; Blasi, Pasquale

Searches for cosmic-ray electron anisotropies with the Fermi Large Area Telescope

Journal Article · Mon Nov 01 00:00:00 EDT 2010 · Physical Review. D, Particles, Fields, Gravitation and Cosmology · OSTI ID:1355735

Ackermann, M.

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
Cosmic Ray Electrons
Anisotropy
Pulsar
SNR
Dark Matter