Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth-Reference-Cited by-同舟云学术

Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth

Published:2017-11-17 Issue:6365 Volume:358 Page:911-914
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Abeysekara A. U.¹,Albert A.²,Alfaro R.³,Alvarez C.⁴,Álvarez J. D.⁵,Arceo R.⁴,Arteaga-Velázquez J. C.⁵,Avila Rojas D.³,Ayala Solares H. A.⁶,Barber A. S.¹,Bautista-Elivar N.⁷,Becerril A.³,Belmont-Moreno E.³,BenZvi S. Y.⁸,Berley D.⁹,Bernal A.¹⁰,Braun J.¹¹,Brisbois C.⁶,Caballero-Mora K. S.⁴,Capistrán T.¹²,Carramiñana A.¹²,Casanova S.¹³¹⁴^ORCID,Castillo M.⁵,Cotti U.⁵,Cotzomi J.¹⁵,Coutiño de León S.¹²,De León C.¹⁵,De la Fuente E.¹⁶,Dingus B. L.²^ORCID,DuVernois M. A.¹¹,Díaz-Vélez J. C.¹⁶,Ellsworth R. W.¹⁷,Engel K.⁹,Enríquez-Rivera O.¹⁸,Fiorino D. W.⁹,Fraija N.¹⁰,García-González J. A.³,Garfias F.¹⁰,Gerhardt M.⁶,González Muñoz A.³,González M. M.¹⁰,Goodman J. A.⁹,Hampel-Arias Z.¹¹,Harding J. P.²,Hernández S.³,Hernández-Almada A.³,Hinton J.¹⁴,Hona B.⁶,Hui C. M.¹⁹,Hüntemeyer P.⁶,Iriarte A.¹⁰,Jardin-Blicq A.¹⁴,Joshi V.¹⁴,Kaufmann S.⁴,Kieda D.¹,Lara A.¹⁸,Lauer R. J.²⁰,Lee W. H.¹⁰,Lennarz D.²¹,Vargas H. León³,Linnemann J. T.²²,Longinotti A. L.¹²,Luis Raya G.⁷,Luna-García R.²³,López-Coto R.¹⁴^ORCID,Malone K.²⁴,Marinelli S. S.²²,Martinez O.¹⁵,Martinez-Castellanos I.⁹,Martínez-Castro J.²³,Martínez-Huerta H.²⁵,Matthews J. A.²⁰,Miranda-Romagnoli P.²⁶,Moreno E.¹⁵,Mostafá M.²⁴,Nellen L.²⁷,Newbold M.¹,Nisa M. U.⁸,Noriega-Papaqui R.²⁶,Pelayo R.²³,Pretz J.²⁴,Pérez-Pérez E. G.⁷,Ren Z.²⁰,Rho C. D.⁸,Rivière C.⁹,Rosa-González D.¹²,Rosenberg M.²⁴,Ruiz-Velasco E.³,Salazar H.¹⁵,Salesa Greus F.¹³^ORCID,Sandoval A.³^ORCID,Schneider M.²⁸,Schoorlemmer H.¹⁴,Sinnis G.²,Smith A. J.⁹,Springer R. W.¹,Surajbali P.¹⁴,Taboada I.²¹,Tibolla O.⁴,Tollefson K.²²,Torres I.¹²,Ukwatta T. N.²,Vianello G.²⁹,Weisgarber T.¹¹,Westerhoff S.¹¹,Wisher I. G.¹¹,Wood J.¹¹,Yapici T.²²,Yodh G.³⁰,Younk P. W.²,Zepeda A.⁴²⁵,Zhou H.²^ORCID,Guo F.²,Hahn J.¹⁴,Li H.²,Zhang H.²

Affiliation:

1. Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA.

2. Los Alamos National Laboratory, Los Alamos, NM, USA.

3. Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.

4. Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico.

5. Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico.

6. Department of Physics, Michigan Technological University, Houghton, MI, USA.

7. Universidad Politecnica de Pachuca, Pachuca, Hidalgo, Mexico.

8. Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA.

9. Department of Physics, University of Maryland, College Park, MD, USA.

10. Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico City, Mexico.

11. Department of Physics, University of Wisconsin–Madison, Madison, WI, USA.

12. Instituto Nacional de Astrofísica, Óptica y Electrónica, Puebla, Mexico.

13. Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland.

14. Max-Planck Institute for Nuclear Physics, Heidelberg, Germany.

15. Facultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico.

16. Departamento de Física, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, Guadalajara, Mexico.

17. School of Physics, Astronomy, and Computational Sciences, George Mason University, Fairfax, VA, USA.

18. Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico City, Mexico.

19. Astrophysics Office, NASA Marshall Space Flight Center Huntsville, AL, USA.

20. Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA.

21. School of Physics and Center for Relativistic Astrophysics, Georgia Institute of Technology, Atlanta, GA, USA.

22. Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA.

23. Centro de Investigación en Computación, Instituto Politécnico Nacional, Mexico City, Mexico.

24. Department of Physics, Pennsylvania State University, University Park, PA, USA.

25. Physics Department, Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico.

26. Universidad Autónoma del Estado de Hidalgo, Pachuca, Mexico.

27. Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico City, Mexico.

28. Santa Cruz Institute for Particle Physics, University of California, Santa Cruz, Santa Cruz, CA, USA.

29. Hansen Experimental Physics Laboratory Stanford University, Stanford, CA, USA.

30. Department of Physics and Astronomy, University of California, Irvine, Irvine, CA, USA.

Abstract

Exotic origin for cosmic positrons Several cosmic-ray detectors have found more positrons arriving at Earth than expected. Some researchers interpret this as a signature of exotic physics, such as the annihilation of dark matter particles. Others prefer a more mundane explanation that involves positron generation at pulsars followed by diffusion to Earth. Abeysekara et al. detected extended emission of gamma rays around two nearby pulsars, generated by high-energy electrons and positrons. The size of the extended emission was used to calculate how far positrons generated by the pulsars diffuse through space—which turns out to be insufficient to reach Earth. The excess positrons detected on Earth must therefore have a more exotic origin than nearby pulsars. Science , this issue p. 911

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference40 articles.

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