作者
AU Abeysekara, Andrea Albert, R Alfaro, C Alvarez, JD Álvarez, R Arceo, JC Arteaga-Velázquez, D Avila Rojas, HA Ayala Solares, AS Barber, N Bautista-Elivar, A Becerril, E Belmont-Moreno, SY BenZvi, Dt Berley, A Bernal, J Braun, C Brisbois, KS Caballero-Mora, T Capistrán, A Carramiñana, S Casanova, M Castillo, U Cotti, J Cotzomi, S Coutiño de León, C De León, E De la Fuente, Brenda L Dingus, MA DuVernois, JC Díaz-Vélez, RW Ellsworth, K Engel, O Enríquez-Rivera, DW Fiorino, N Fraija, JA García-González, F Garfias, M Gerhardt, A González Muñoz, MM González, JA Goodman, Z Hampel-Arias, James Patrick Harding, S Hernández, A Hernández-Almada, J Hinton, B Hona, CM Hui, P Hüntemeyer, A Iriarte, A Jardin-Blicq, V Joshi, S Kaufmann, D Kieda, A Lara, RJ Lauer, WH Lee, D Lennarz, H León Vargas, JT Linnemann, AL Longinotti, G Luis Raya, R Luna-García, R López-Coto, K Malone, SS Marinelli, O Martinez, I Martinez-Castellanos, J Martínez-Castro, H Martínez-Huerta, JA Matthews, P Miranda-Romagnoli, E Moreno, M Mostafá, L Nellen, M Newbold, MU Nisa, R Noriega-Papaqui, R Pelayo, J Pretz, EG Pérez-Pérez, Z Ren, CD Rho, C Rivière, D Rosa-González, M Rosenberg, E Ruiz-Velasco, H Salazar, F Salesa Greus, A Sandoval, M Schneider, H Schoorlemmer, G Sinnis, AJ Smith, RW Springer, P Surajbali, I Taboada, O Tibolla, K Tollefson, I Torres, TN Ukwatta, G Vianello, T Weisgarber, S Westerhoff, IG Wisher, J Wood, T Yapici, G Yodh, PW Younk, A Zepeda, H Zhou, Fan Guo, J Hahn, Hui Li, H Zhang
发表日期
2017/11/17
期刊
Science
卷号
358
期号
6365
页码范围
911-914
出版商
American Association for the Advancement of Science
简介
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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AU Abeysekara, A Albert, R Alfaro, C Alvarez… - Science, 2017