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DOI	10.1126/science.aan4880
	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.; Iriarte A.; Jardin-Blicq A.; Joshi V.; Kaufmann S.; Kieda D.; Lara A.; Lauer R.J.; Lee W.H.; Lennarz D.; León Vargas H.; Linnemann J.T.; Longinotti A.L.; Luis Raya G.; Luna-García R.; López-Coto R.; Malone K.; Marinelli S.S.; Martinez O.; Martinez-Castellanos I.; Martínez-Castro J.; Martínez-Huerta H.; Matthews J.A.; Miranda-Romagnoli P.; Moreno E.; Mostafá M.; Nellen L.; Newbold M.; Nisa M.U.; Noriega-Papaqui R.; Pelayo R.; Pretz J.; Pérez-Pérez E.G.; Ren Z.; Rho C.D.; Rivière C.; Rosa-González D.; Rosenberg M.; Ruiz-Velasco E.; Salazar H.; Salesa Greus F.; Sandoval A.; Schneider M.; Schoorlemmer H.; Sinnis G.; Smith A.J.; Springer R.W.; Surajbali P.; Taboada I.; Tibolla O.; Tollefson K.; Torres I.; Ukwatta T.N.; Vianello G.; Weisgarber T.; Westerhoff S.; Wisher I.G.; Wood J.; Yapici T.; Yodh G.; Younk P.W.; Zepeda A.; Zhou H.; Guo F.; Hahn J.; Li H.; Zhang H.
发表日期	2017
ISSN	0036-8075
起始页码	911
结束页码	914
卷号	358 期号:6365
英文摘要	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. © 2017, American Association for the Advancement of Science. All rights reserved.
英文关键词	astrophysics; cosmic ray; diffusion; Earth; gamma ray radiation; Article; astronomy; compton effect; cosmic radiation; diffusion; diffusion coefficient; electron; electron transport; energy; gamma radiation; lepton; luminance; magnetic field; photon; positron; priority journal; pulsar; synchrotron radiation; tera electron volt emission
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246230
作者单位	Department of Physics and Astronomy, University of Utah, Salt Lake City, UT, United States; Los Alamos National Laboratory, Los Alamos, NM, United States; Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico; Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico; Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Mexico; Department of Physics, Michigan Technological University, Houghton, MI, United States; Universidad Politecnica de Pachuca, Pachuca, Hidalgo, Mexico; Department of Physics and Astronomy, University of Rochester, Rochester, NY, United States; Department of Physics, University of Maryland, College Park, MD, United States; Instituto de Astronomía, Universidad Nacional Autónoma de México, Mexico City, Mexico; Department of Physics, University of Wisconsin–Madison, Madison, WI, United States; Instituto Nacional de Astrofísica, Óptica y Electrónica, Puebla, Mexico; Institute of Nuclear Physics Polish Academy of Sciences, Krakow, Poland; Max-Planc...
推荐引用方式 GB/T 7714	Abeysekara A.U.,Albert A.,Alfaro R.,et al. Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth[J],2017,358(6365).
APA	Abeysekara A.U..,Albert A..,Alfaro R..,Alvarez C..,Álvarez J.D..,...&Zhang H..(2017).Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth.Science,358(6365).
MLA	Abeysekara A.U.,et al."Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth".Science 358.6365(2017).