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

Abeysekara, A U; Albert, A; Alfaro, R; Alvarez, C; Álvarez, J D; Arceo, R; Arteaga-Velázquez, J C; Avila Rojas, D; Ayala Solares, H A; Barber, A S; Bautista-Elivar, N; Becerril, A; Belmont-Moreno, E; BenZvi, S Y; Berley, D; Bernal, A; Braun, J; Brisbois, C; Caballero-Mora, K S; Capistrán, T; Carramiñana, A; Casanova, S; Castillo, M; Cotti, U; Cotzomi, J; Coutiño de León, S; De León, C; De la Fuente, E; Dingus, B L; DuVernois, M A; Díaz-Vélez, J C; Ellsworth, R W; Engel, K; Enríquez-Rivera, O; Fiorino, D W; Fraija, N; García-González, J A; Garfias, F; Gerhardt, M; González Muñoz, A; González, M M; Goodman, J A; Hampel-Arias, Z; Harding, J P; Hernández, S; Hernández-Almada, A; Hinton, J; Hona, B; Hui, C M; Hüntemeyer, P

Abeysekara, A U; Albert, A; Alfaro, R; Alvarez, C; Álvarez, J D; Arceo, R; Arteaga-Velázquez, J C; Avila Rojas, D; Ayala Solares, H A; Barber, A S; Bautista-Elivar, N; Becerril, A; Belmont-Moreno, E; BenZvi, S Y; Berley, D; Bernal, A; Braun, J; Brisbois, C; Caballero-Mora, K S; Capistrán, T; Carramiñana, A; Casanova, S; Castillo, M; Cotti, U; Cotzomi, J; Coutiño de León, S; De León, C; De la Fuente, E; Dingus, B L; DuVernois, M A; Díaz-Vélez, J C; Ellsworth, R W; Engel, K; Enríquez-Rivera, O; Fiorino, D W; Fraija, N; García-González, J A; Garfias, F; Gerhardt, M; González Muñoz, A; González, M M; Goodman, J A; Hampel-Arias, Z; Harding, J P; Hernández, S; Hernández-Almada, A; Hinton, J; Hona, B; Hui, C M; Hüntemeyer, P.

Afiliação

Abeysekara AU; Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA.
Albert A; Los Alamos National Laboratory, Los Alamos, NM, USA.
Alfaro R; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Alvarez C; Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico.
Álvarez JD; Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico.
Arceo R; Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico.
Arteaga-Velázquez JC; Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico.
Avila Rojas D; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Ayala Solares HA; Department of Physics, Michigan Technological University, Houghton, MI, USA.
Barber AS; Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, USA.
Bautista-Elivar N; Universidad Politecnica de Pachuca, Pachuca, Hidalgo, Mexico.
Becerril A; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Belmont-Moreno E; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
BenZvi SY; Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA.
Berley D; Department of Physics, University of Maryland, College Park, MD, USA.
Bernal A; Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Braun J; Department of Physics, University of Wisconsin-Madison, Madison, WI, USA.
Brisbois C; Department of Physics, Michigan Technological University, Houghton, MI, USA.
Caballero-Mora KS; Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico.
Capistrán T; Instituto Nacional de Astrofísica, Óptica y Electrónica, Puebla, Mexico.
Carramiñana A; Instituto Nacional de Astrofísica, Óptica y Electrónica, Puebla, Mexico.
Casanova S; Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland.
Castillo M; Max-Planck Institute for Nuclear Physics, Heidelberg, Germany.
Cotti U; Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico.
Cotzomi J; Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico.
Coutiño de León S; Facultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico.
De León C; Instituto Nacional de Astrofísica, Óptica y Electrónica, Puebla, Mexico.
De la Fuente E; Facultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla, Puebla, Mexico.
Dingus BL; Departamento de Física, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, Guadalajara, Mexico.
DuVernois MA; Los Alamos National Laboratory, Los Alamos, NM, USA.
Díaz-Vélez JC; Department of Physics, University of Wisconsin-Madison, Madison, WI, USA.
Ellsworth RW; Departamento de Física, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara, Guadalajara, Mexico.
Engel K; School of Physics, Astronomy, and Computational Sciences, George Mason University, Fairfax, VA, USA.
Enríquez-Rivera O; Department of Physics, University of Maryland, College Park, MD, USA.
Fiorino DW; Instituto de Geofísica, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Fraija N; Department of Physics, University of Maryland, College Park, MD, USA.
García-González JA; Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Garfias F; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Gerhardt M; Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico City, Mexico.
González Muñoz A; Department of Physics, Michigan Technological University, Houghton, MI, USA.
González MM; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Goodman JA; Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Hampel-Arias Z; Department of Physics, University of Maryland, College Park, MD, USA.
Harding JP; Department of Physics, University of Wisconsin-Madison, Madison, WI, USA.
Hernández S; Los Alamos National Laboratory, Los Alamos, NM, USA.
Hernández-Almada A; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Hinton J; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico.
Hona B; Max-Planck Institute for Nuclear Physics, Heidelberg, Germany.
Hui CM; Department of Physics, Michigan Technological University, Houghton, MI, USA.
Hüntemeyer P; Astrophysics Office, NASA Marshall Space Flight Center Huntsville, AL, USA.

Science ; 358(6365): 911-914, 2017 11 17.

Article em En | MEDLINE | ID: mdl-29146808

ABSTRACT

ABSTRACT

The unexpectedly high flux of cosmic-ray positrons detected at Earth may originate from nearby astrophysical sources, dark matter, or unknown processes of cosmic-ray secondary production. We report the detection, using the High-Altitude Water Cherenkov Observatory (HAWC), of extended tera-electron volt gamma-ray emission coincident with the locations of two nearby middle-aged pulsars (Geminga and PSR B0656+14). The HAWC observations demonstrate that these pulsars are indeed local sources of accelerated leptons, but the measured tera-electron volt emission profile constrains the diffusion of particles away from these sources to be much slower than previously assumed. We demonstrate that the leptons emitted by these objects are therefore unlikely to be the origin of the excess positrons, which may have a more exotic origin.

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Texto completo: 1 Bases de dados: MEDLINE Idioma: En Revista: Science Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Estados Unidos