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von Doetinchem P, Perez K, Aramaki T, Baker S, Barwick S, Bird R, Boezio M, Boggs S, Cui M, Datta A, Donato F, Evoli C, Fabris L, Fabbietti L, Ferronato Bueno E, Fornengo N, Fuke H, Gerrity C, Gomez Coral D, Hailey C, Hooper D, Kachelriess M, Korsmeier M, Kozai M, Lea R, Li N, Lowell A, Manghisoni M, Moskalenko I, Munini R, Naskret M, Nelson T, Ng K, Nozzoli F, Oliva A, Ong R, Osteria G, Pierog T, Poulin V, Profumo S, Pöschl T, Quinn S, Re V, Rogers F, Ryan J, Saffold N, Sakai K, Salati P, Schael S, Serksnyte L, Shukla A, Stoessl A, Tjemsland J, Vannuccini E, Vecchi M, Winkler M, Wright D, Xiao M, Xu W, Yoshida T, Zampa G, Zuccon P. Cosmic-ray antinuclei as messengers of new physics: status and outlook for the new decade. J Cosmol Astropart Phys 2020; 2020:035. [PMID: 34712102 PMCID: PMC8549764 DOI: 10.1088/1475-7516/2020/08/035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The precise measurement of cosmic-ray antinuclei serves as an important means for identifying the nature of dark matter and other new astrophysical phenomena, and could be used with other cosmic-ray species to understand cosmic-ray production and propagation in the Galaxy. For instance, low-energy antideuterons would provide a "smoking gun" signature of dark matter annihilation or decay, essentially free of astrophysical background. Studies in recent years have emphasized that models for cosmic-ray antideuterons must be considered together with the abundant cosmic antiprotons and any potential observation of antihelium. Therefore, a second dedicated Antideuteron Workshop was organized at UCLA in March 2019, bringing together a community of theorists and experimentalists to review the status of current observations of cosmic-ray antinuclei, the theoretical work towards understanding these signatures, and the potential of upcoming measurements to illuminate ongoing controversies. This review aims to synthesize this recent work and present implications for the upcoming decade of antinuclei observations and searches. This includes discussion of a possible dark matter signature in the AMS-02 antiproton spectrum, the most recent limits from BESS Polar-II on the cosmic antideuteron flux, and reports of candidate antihelium events by AMS-02; recent collider and cosmic-ray measurements relevant for antinuclei production models; the state of cosmic-ray transport models in light of AMS-02 and Voyager data; and the prospects for upcoming experiments, such as GAPS. This provides a roadmap for progress on cosmic antinuclei signatures of dark matter in the coming years.
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Affiliation(s)
- P. von Doetinchem
- Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Rd, Honolulu, HI 96822 U.S.A
| | - K. Perez
- Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 U.S.A
| | - T. Aramaki
- Stanford Linear Accelerator Center, 2575 Sand Hill Rd, Menlo Park, CA 94025 U.S.A
| | - S. Baker
- Imperial College London, London, SW7 2AZ, U.K
| | - S. Barwick
- Department of Physics & Astronomy, University of California at Irvine, 4129 Frederick Reines Hall, Irvine, CA 92697, U.S.A
| | - R. Bird
- Department of Physics and Astronomy, University of California at Los Angeles, 475 Portola Plaza, Los Angeles, CA 90095, U.S.A
| | - M. Boezio
- INFN, Sezione di Trieste, Padriciano 99, 34149 Trieste, Italy
| | - S.E. Boggs
- Department of Physics, University of California at San Diego, 9500 Gilman Dr., La Jolla, CA 90037, U.S.A
| | - M. Cui
- Purple Mountain Observatory, Yuanhua Road, Qixia District, Nanjing 210033, China
| | - A. Datta
- Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Rd, Honolulu, HI 96822 U.S.A
| | - F. Donato
- Department of Physics, University of Turin, Via Pietro Giuria, 1, 10125 Torino, Italy
- INFN, Sezione di Torino, Via Pietro Giuria, 1, 10125 Torino, Italy
| | - C. Evoli
- Gran Sasso Science Institute, Viale Francesco Crispi 7, 67100 L’Aquila, Italy
- INFN, Laboratori Nazionali del Gran Sasso, Via G. Acitelli, 22, 67100 Assergi, L’Aquila, Italy
| | - L. Fabris
- Isotope and Fuel Cycle and Technology Division, Oak Ridge National Laboratory, PO BOX 2008, Oak Ridge, TN 37831, U.S.A
| | - L. Fabbietti
- Department of Physics, Technical University of Munich, James-Franck Str. 1, 85748 Garching, Germany
| | - E. Ferronato Bueno
- Kapteyn Astronomical Institute, Rijksuniversiteit Groningen, Landleven 12, 9717 AD Groningen, The Netherlands
| | - N. Fornengo
- Department of Physics, University of Turin, Via Pietro Giuria, 1, 10125 Torino, Italy
- INFN, Sezione di Torino, Via Pietro Giuria, 1, 10125 Torino, Italy
| | - H. Fuke
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 252-5210, Japan
| | - C. Gerrity
- Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Rd, Honolulu, HI 96822 U.S.A
| | - D. Gomez Coral
- Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Rd, Honolulu, HI 96822 U.S.A
- Institute of Physics, National Autonomous University of Mexico, Circuito de la investigación científica, C.U. 04510, Ciudad de México, Mexico
| | - C. Hailey
- Department of Physics, Columbia University, 500 W 120th St, New York, NY 10027, U.S.A
| | - D. Hooper
- Theoretical Astrophysics, Fermi National Accelerator Laboratory, Wilson and Kirk Rds, Batavia, IL 60510, U.S.A
- Department of Astronomy and Astrophysics, University of Chicago, 5640 S. Ellis Ave, Chicago, IL 60637, U.S.A
- Kavli Institute for Cosmological Physics, University of Chicago, 5640 S. Ellis Ave, Chicago, IL 60637, U.S.A
| | - M. Kachelriess
- Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - M. Korsmeier
- Department of Physics, University of Turin, Via Pietro Giuria, 1, 10125 Torino, Italy
- INFN, Sezione di Torino, Via Pietro Giuria, 1, 10125 Torino, Italy
- Institute for Theoretical Particle Physics and Cosmology, RWTH Aachen University, 52056 Aachen, Germany
| | - M. Kozai
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 252-5210, Japan
| | - R. Lea
- INFN, Sezione di Trieste, Padriciano 99, 34149 Trieste, Italy
- Dipartimento di Fisica dell’Universitá Trieste, Via Valerio 2, 34127 Trieste, Italy
| | - N. Li
- CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, No.19A Yuquan Road, Shijingshan District, Beijing 100049, China
| | - A. Lowell
- Department of Physics, University of California at San Diego, 9500 Gilman Dr., La Jolla, CA 90037, U.S.A
| | - M. Manghisoni
- INFN, Sezione di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy
- Dipartimento di Ingegneria Industriale, Università di Bergamo, Viale Marconi 5, 24044 Dalmine, Italy
| | - I.V. Moskalenko
- Hansen Experimental Physics Laboratory, Stanford University, 452 Lomita Mall, Stanford, CA 94305, U.S.A
- Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, CA 94305, U.S.A
| | - R. Munini
- INFN, Sezione di Trieste, Padriciano 99, 34149 Trieste, Italy
| | - M. Naskret
- Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Rd, Honolulu, HI 96822 U.S.A
- Institute of Theoretical Physics, University of Wroclaw, pl. M. Borna 9, 50-204 Wroclaw, Poland
| | - T. Nelson
- Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Rd, Honolulu, HI 96822 U.S.A
| | - K.C.Y. Ng
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - F. Nozzoli
- INFN, Trento Institute for Fundamental Physics and Applications, Via Sommarive, 14, 38123 Povo, Italy
| | - A. Oliva
- INFN, Sezione di Bologna, Via Irnerio 46, Bologna 40126, Italy
| | - R.A. Ong
- Department of Physics and Astronomy, University of California at Los Angeles, 475 Portola Plaza, Los Angeles, CA 90095, U.S.A
| | - G. Osteria
- INFN, Sezione di Napoli, Strada Comunale Cinthia, 80126 Naples, Italy
| | - T. Pierog
- Institute for Nuclear Physics, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - V. Poulin
- Laboratoire Univers & Particules de Montpellier, CNRS, Université de Montpellier, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
| | - S. Profumo
- Department of Physics and Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, CA 95064, U.S.A
| | - T. Pöschl
- Department of Physics, Technical University of Munich, James-Franck Str. 1, 85748 Garching, Germany
| | - S. Quinn
- Department of Physics and Astronomy, University of California at Los Angeles, 475 Portola Plaza, Los Angeles, CA 90095, U.S.A
| | - V. Re
- INFN, Sezione di Pavia, Via Agostino Bassi 6, 27100 Pavia, Italy
- Dipartimento di Ingegneria Industriale, Università di Bergamo, Viale Marconi 5, 24044 Dalmine, Italy
| | - F. Rogers
- Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 U.S.A
| | - J. Ryan
- Department of Physics and Astronomy, University of California at Los Angeles, 475 Portola Plaza, Los Angeles, CA 90095, U.S.A
| | - N. Saffold
- Department of Physics, Columbia University, 500 W 120th St, New York, NY 10027, U.S.A
| | - K. Sakai
- NASA-Goddard Space Flight Center), 8800 Greenbelt Rd, Greenbelt, MD 20771, U.S.A
- CRESST, University of Maryland, Baltimore County, MD 21250, U.S.A
| | - P. Salati
- Laboratoire d’Annecy-le-Vieux de Physique Théorique, 9 Chemin de Bellevue, 74940 Annecy, France
| | - S. Schael
- I. Physikalisches Institut, RWTH Aachen University, Sommerfeldstr. 14, 52074 Aachen, Germany
| | - L. Serksnyte
- Department of Physics, Technical University of Munich, James-Franck Str. 1, 85748 Garching, Germany
| | - A. Shukla
- Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Rd, Honolulu, HI 96822 U.S.A
| | - A. Stoessl
- Department of Physics and Astronomy, University of Hawaii at Manoa, 2505 Correa Rd, Honolulu, HI 96822 U.S.A
| | - J. Tjemsland
- Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - E. Vannuccini
- INFN, Sezione di Firenze, 50019 Sesto Fiorentino, Florence, Italy
| | - M. Vecchi
- Kapteyn Astronomical Institute, Rijksuniversiteit Groningen, Landleven 12, 9717 AD Groningen, The Netherlands
| | - M.W. Winkler
- The Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, Alba Nova, 10691 Stockholm, Sweden
| | - D. Wright
- Stanford Linear Accelerator Center, 2575 Sand Hill Rd, Menlo Park, CA 94025 U.S.A
| | - M. Xiao
- Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Ave, Cambridge, MA 02139 U.S.A
| | - W. Xu
- Department of Physics, Harvard University, 17 Oxford St, Cambridge, MA, 95129, U.S.A
| | - T. Yoshida
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 252-5210, Japan
| | - G. Zampa
- INFN, Sezione di Trieste, Padriciano 99, 34149 Trieste, Italy
| | - P. Zuccon
- INFN, Trento Institute for Fundamental Physics and Applications, Via Sommarive, 14, 38123 Povo, Italy
- Department of Physics, University of Trento, Via Sommarive 14, 38123 Povo, Italy
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Ammazzalorso S, Gruen D, Regis M, Camera S, Ando S, Fornengo N, Bechtol K, Bridle SL, Choi A, Eifler TF, Gatti M, MacCrann N, Omori Y, Samuroff S, Sheldon E, Troxel MA, Zuntz J, Carrasco Kind M, Annis J, Avila S, Bertin E, Brooks D, Burke DL, Carnero Rosell A, Carretero J, Castander FJ, Costanzi M, da Costa LN, De Vicente J, Desai S, Diehl HT, Dietrich JP, Doel P, Everett S, Flaugher B, Fosalba P, García-Bellido J, Gaztanaga E, Gerdes DW, Giannantonio T, Goldstein DA, Gruendl RA, Gutierrez G, Hollowood DL, Honscheid K, James DJ, Jarvis M, Jeltema T, Kent S, Kuropatkin N, Lahav O, Li TS, Lima M, Maia MAG, Marshall JL, Melchior P, Menanteau F, Miquel R, Ogando RLC, Palmese A, Plazas AA, Romer AK, Roodman A, Rykoff ES, Sánchez C, Sanchez E, Scarpine V, Serrano S, Sevilla-Noarbe I, Smith M, Soares-Santos M, Sobreira F, Suchyta E, Swanson MEC, Tarle G, Thomas D, Vikram V, Zhang Y. Detection of Cross-Correlation between Gravitational Lensing and γ Rays. Phys Rev Lett 2020; 124:101102. [PMID: 32216401 DOI: 10.1103/physrevlett.124.101102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 12/14/2019] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
In recent years, many γ-ray sources have been identified, yet the unresolved component hosts valuable information on the faintest emission. In order to extract it, a cross-correlation with gravitational tracers of matter in the Universe has been shown to be a promising tool. We report here the first identification of a cross-correlation signal between γ rays and the distribution of mass in the Universe probed by weak gravitational lensing. We use data from the Dark Energy Survey Y1 weak lensing data and the Fermi Large Area Telescope 9-yr γ-ray data, obtaining a signal-to-noise ratio of 5.3. The signal is mostly localized at small angular scales and high γ-ray energies, with a hint of correlation at extended separation. Blazar emission is likely the origin of the small-scale effect. We investigate implications of the large-scale component in terms of astrophysical sources and particle dark matter emission.
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Affiliation(s)
- S Ammazzalorso
- Dipartimento di Fisica, Università degli Studi di Torino, via Pietro Giuria 1, 10125 Torino, Italy
- INFN-Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via Pietro Giuria 1, 10125 Torino, Italy
| | - D Gruen
- Kavli Institute for Particle Astrophysics and Cosmology, P. O. Box 2450, Stanford University, Stanford, California 94305, USA
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M Regis
- Dipartimento di Fisica, Università degli Studi di Torino, via Pietro Giuria 1, 10125 Torino, Italy
- INFN-Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via Pietro Giuria 1, 10125 Torino, Italy
| | - S Camera
- Dipartimento di Fisica, Università degli Studi di Torino, via Pietro Giuria 1, 10125 Torino, Italy
- INFN-Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via Pietro Giuria 1, 10125 Torino, Italy
- INAF-Istituto Nazionale di Astrofisica, Osservatorio Astrofisico di Torino, strada Osservatorio 20, 10025 Pino Torinese, Italy
- Department of Physics and Astronomy, University of the Western Cape, Cape Town 7535, South Africa
| | - S Ando
- GRAPPA Institute, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
- Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583, Japan
| | - N Fornengo
- Dipartimento di Fisica, Università degli Studi di Torino, via Pietro Giuria 1, 10125 Torino, Italy
- INFN-Istituto Nazionale di Fisica Nucleare, Sezione di Torino, via Pietro Giuria 1, 10125 Torino, Italy
| | - K Bechtol
- LSST, 933 North Cherry Avenue, Tucson, Arizona 85721, USA
- Physics Department, 2320 Chamberlin Hall, University of Wisconsin-Madison, 1150 University Avenue Madison, Wisconsin 53706-1390, USA
| | - S L Bridle
- Jodrell Bank Center for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - A Choi
- Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, Ohio 43210, USA
| | - T F Eifler
- Department of Astronomy and Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, Arizona 85721-0065, USA
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA
| | - M Gatti
- Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra, Barcelona, Spain
| | - N MacCrann
- Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, Ohio 43210, USA
- Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
| | - Y Omori
- Kavli Institute for Particle Astrophysics and Cosmology, P. O. Box 2450, Stanford University, Stanford, California 94305, USA
| | - S Samuroff
- Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15312, USA
| | - E Sheldon
- Brookhaven National Laboratory, Building 510, Upton, New York 11973, USA
| | - M A Troxel
- Department of Physics, Duke University Durham, North Carolina 27708, USA
| | - J Zuntz
- Institute for Astronomy, University of Edinburgh, Edinburgh EH9 3HJ, United Kingdom
| | - M Carrasco Kind
- Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, Illinois 61801, USA
- National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USA
| | - J Annis
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
| | - S Avila
- Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, 28049 Madrid, Spain
| | - E Bertin
- CNRS, UMR 7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
- Sorbonne Universités, UPMC Univ Paris 06, UMR 7095, Institut d'Astrophysique de Paris, F-75014 Paris, France
| | - D Brooks
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - D L Burke
- Kavli Institute for Particle Astrophysics and Cosmology, P. O. Box 2450, Stanford University, Stanford, California 94305, USA
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - A Carnero Rosell
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
- Laboratório Interinstitucional de e-Astronomia-LIneA, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
| | - J Carretero
- Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra, Barcelona, Spain
| | - F J Castander
- Institut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain
- Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, Spain
| | - M Costanzi
- INAF-Osservatorio Astronomico di Trieste, via Giambattista Tiepolo 11, 34143 Trieste, Italy
- IFPU-Institute for Fundamental Physics of the Universe, Via Beirut 2, 34014 Trieste, Italy
| | - L N da Costa
- Laboratório Interinstitucional de e-Astronomia-LIneA, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
- Observatório Nacional, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
| | - J De Vicente
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
| | - S Desai
- Department of Physics, IIT Hyderabad, Kandi, Telangana 502285, India
| | - H T Diehl
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
| | - J P Dietrich
- Excellence Cluster Origins, Boltzmannstrasse 2, 85748 Garching, Germany
- Faculty of Physics, Ludwig-Maximilians-Universität, Scheinerstrasse 1, 81679 Munich, Germany
| | - P Doel
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - S Everett
- Santa Cruz Institute for Particle Physics, Santa Cruz, California 95064, USA
| | - B Flaugher
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
| | - P Fosalba
- Institut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain
- Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, Spain
| | - J García-Bellido
- Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, 28049 Madrid, Spain
| | - E Gaztanaga
- Institut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain
- Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, Spain
| | - D W Gerdes
- Department of Astronomy, University of Michigan, Ann Arbor, Michigan 48109, USA
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - T Giannantonio
- Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, United Kingdom
- Kavli Institute for Cosmology, University of Cambridge, Madingley Road, Cambridge CB3 0HA, United Kingdom
| | - D A Goldstein
- California Institute of Technology, 1200 East California Boulevard, MC 249-17, Pasadena, California 91125, USA
| | - R A Gruendl
- Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, Illinois 61801, USA
- National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USA
| | - G Gutierrez
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
| | - D L Hollowood
- Santa Cruz Institute for Particle Physics, Santa Cruz, California 95064, USA
| | - K Honscheid
- Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, Ohio 43210, USA
- Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
| | - D J James
- Center for Astrophysics, Harvard-Smithsonian, 60 Garden Street, Cambridge, Massachusetts 02138, USA
| | - M Jarvis
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - T Jeltema
- Santa Cruz Institute for Particle Physics, Santa Cruz, California 95064, USA
| | - S Kent
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
- Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - N Kuropatkin
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
| | - O Lahav
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - T S Li
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
- Kavli Institute for Cosmological Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - M Lima
- Laboratório Interinstitucional de e-Astronomia-LIneA, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
- Departamento de Física Matemática, Instituto de Física, Universidade de São Paulo, CP 66318, São Paulo, SP, 05314-970, Brazil
| | - M A G Maia
- Laboratório Interinstitucional de e-Astronomia-LIneA, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
- Observatório Nacional, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
| | - J L Marshall
- George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
| | - P Melchior
- Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, New Jersey 08544, USA
| | - F Menanteau
- Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 West Green Street, Urbana, Illinois 61801, USA
- National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USA
| | - R Miquel
- Institut de Física d'Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain
| | - R L C Ogando
- Laboratório Interinstitucional de e-Astronomia-LIneA, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
- Observatório Nacional, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
| | - A Palmese
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
| | - A A Plazas
- Department of Astrophysical Sciences, Princeton University, Peyton Hall, Princeton, New Jersey 08544, USA
| | - A K Romer
- Department of Physics and Astronomy, Pevensey Building, University of Sussex, Brighton BN1 9QH, United Kingdom
| | - A Roodman
- Kavli Institute for Particle Astrophysics and Cosmology, P. O. Box 2450, Stanford University, Stanford, California 94305, USA
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - E S Rykoff
- Kavli Institute for Particle Astrophysics and Cosmology, P. O. Box 2450, Stanford University, Stanford, California 94305, USA
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - C Sánchez
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - E Sanchez
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
| | - V Scarpine
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
| | - S Serrano
- Institut d'Estudis Espacials de Catalunya (IEEC), 08034 Barcelona, Spain
- Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, Spain
| | - I Sevilla-Noarbe
- Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), 28040 Madrid, Spain
| | - M Smith
- School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - M Soares-Santos
- Brandeis University, Physics Department, 415 South Street, Waltham, Massachusetts 02453, USA
| | - F Sobreira
- Laboratório Interinstitucional de e-Astronomia-LIneA, Rua General José Cristino 77, Rio de Janeiro, RJ-20921-400, Brazil
- Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859 Campinas, São Paulo, Brazil
| | - E Suchyta
- Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - M E C Swanson
- National Center for Supercomputing Applications, 1205 West Clark Street, Urbana, Illinois 61801, USA
| | - G Tarle
- Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - D Thomas
- Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 3FX, United Kingdom
| | - V Vikram
- Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, USA
| | - Y Zhang
- Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, Illinois 60510, USA
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Ackermann M, Ajello M, Baldini L, Ballet J, Barbiellini G, Bastieri D, Bellazzini R, Bissaldi E, Blandford RD, Bonino R, Bottacini E, Bregeon J, Bruel P, Buehler R, Burns E, Buson S, Cameron RA, Caputo R, Caraveo PA, Cavazzuti E, Chen S, Chiaro G, Ciprini S, Costantin D, Cuoco A, Cutini S, D'Ammando F, de la Torre Luque P, de Palma F, Desai A, Digel SW, Di Lalla N, Di Mauro M, Di Venere L, Fana Dirirsa F, Favuzzi C, Franckowiak A, Fukazawa Y, Funk S, Fusco P, Gargano F, Gasparrini D, Giglietto N, Giordano F, Giroletti M, Green D, Grenier IA, Guillemot L, Guiriec S, Horan D, Jóhannesson G, Kuss M, Larsson S, Latronico L, Li J, Liodakis I, Longo F, Loparco F, Lubrano P, Magill JD, Maldera S, Malyshev D, Manfreda A, Mazziotta MN, Mereu I, Michelson PF, Mitthumsiri W, Mizuno T, Monzani ME, Morselli A, Moskalenko IV, Negro M, Nuss E, Orienti M, Orlando E, Palatiello M, Paliya VS, Paneque D, Persic M, Pesce-Rollins M, Petrosian V, Piron F, Porter TA, Principe G, Rainò S, Rando R, Razzano M, Razzaque S, Reimer A, Reimer O, Serini D, Sgrò C, Siskind EJ, Spandre G, Spinelli P, Suson DJ, Tajima H, Takahashi M, Thayer JB, Tibaldo L, Torres DF, Troja E, Venters TM, Vianello G, Wood K, Yassine M, Zaharijas G, Ammazzalorso S, Fornengo N, Regis M. Unresolved Gamma-Ray Sky through its Angular Power Spectrum. Phys Rev Lett 2018; 121:241101. [PMID: 30608723 DOI: 10.1103/physrevlett.121.241101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 10/11/2018] [Indexed: 06/09/2023]
Abstract
The gamma-ray sky has been observed with unprecedented accuracy in the last decade by the Fermi -large area telescope (LAT), allowing us to resolve and understand the high-energy Universe. The nature of the remaining unresolved emission [unresolved gamma-ray background (UGRB)] below the LAT source detection threshold can be uncovered by characterizing the amplitude and angular scale of the UGRB fluctuation field. This Letter presents a measurement of the UGRB autocorrelation angular power spectrum based on eight years of Fermi-LAT Pass 8 data products. The analysis is designed to be robust against contamination from resolved sources and noise systematics. The sensitivity to subthreshold sources is greatly enhanced with respect to previous measurements. We find evidence (with ∼3.7σ significance) that the scenario in which two classes of sources contribute to the UGRB signal is favored over a single class. A double power law with exponential cutoff can explain the anisotropy energy spectrum well, with photon indices of the two populations being 2.55±0.23 and 1.86±0.15.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - S Ammazzalorso
- Istituto Nazionale di Fisica Nucleare, Sezione di Torino, I-10125 Torino, Italy
- Dipartimento di Fisica, Università degli Studi di Torino, I-10125 Torino, Italy
| | - N Fornengo
- Istituto Nazionale di Fisica Nucleare, Sezione di Torino, I-10125 Torino, Italy
- Dipartimento di Fisica, Università degli Studi di Torino, I-10125 Torino, Italy
| | - M Regis
- Istituto Nazionale di Fisica Nucleare, Sezione di Torino, I-10125 Torino, Italy
- Dipartimento di Fisica, Università degli Studi di Torino, I-10125 Torino, Italy
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