Results 71 to 80 of about 42,851 (177)

Precise Measurement of the Cosmic-Ray Spectrum and 〈ln A〉 by LHAASO: Connecting the Galactic to the Extragalactic Components

The Astrophysical Journal
Recently, the LHAASO Collaboration has provided precise measurements of the cosmic rays (CRs) all-particle energy spectrum and mean logarithmic mass $\left\langle \mathrm{ln}A\right\rangle $ from 0.3 to 30 PeV. Combining the CR measurements by AMS-02 and
Xing-Jian Lv, Xiao-Jun Bi, Kun Fang, Yi-Qing Guo, Hui-Hai He, Ling-Ling Ma, Peng-Fei Yin, Qiang Yuan, Meng-Jie Zhao   +8 more
doaj   +1 more source

Observation of the Galactic Center PeVatron beyond 100 TeV with HAWC

The Astrophysical Journal Letters
We report an observation of ultrahigh-energy (UHE) gamma rays from the Galactic center (GC) region, using 7 yr of data collected by the High-Altitude Water Cherenkov (HAWC) Observatory.
A. Albert, R. Alfaro, C. Alvarez, A. Andrés, J. C. Arteaga-Velázquez, D. Avila Rojas, H. A. Ayala Solares, R. Babu, E. Belmont-Moreno, A. Bernal, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, U. Cotti, J. Cotzomi, S. Coutiño de León, E. De la Fuente, C. de León, D. Depaoli, N. Di Lalla, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, J. C. Díaz-Vélez, K. Engel, T. Ergin, C. Espinoza, K. L. Fan, K. Fang, N. Fraija, S. Fraija, J. A. García-González, F. Garfias, H. Goksu, M. M. González, J. A. Goodman, S. Groetsch, J. P. Harding, S. Hernández-Cadena, I. Herzog, J. Hinton, D. Huang, F. Hueyotl-Zahuantitla, T. B. Humensky, P. Hüntemeyer, A. Iriarte, S. Kaufmann, D. Kieda, A. Lara, W. H. Lee, J. Lee, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis-Raya, K. Malone, O. Martinez, J. Martínez-Castro, J. A. Matthews, P. Miranda-Romagnoli, J. A. Montes, J. A. Morales-Soto, E. Moreno, M. Mostafá, M. Najafi, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, L. Olivera-Nieto, N. Omodei, M. Osorio-Archila, Y. Pérez Araujo, E. G. Pérez-Pérez, C. D. Rho, D. Rosa-González, E. Ruiz-Velasco, H. Salazar, D. Salazar-Gallegos, A. Sandoval, M. Schneider, G. Schwefer, J. Serna-Franco, A. J. Smith, Y. Son, R. W. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres-Escobedo, R. Turner, F. Ureña-Mena, E. Varela, X. Wang, Z. Wang, I. J. Watson, E. Willox, H. Wu, S. Yu, S. Yun-Cárcamo, H. Zhou   +101 more
doaj   +1 more source

The Air Microwave Yield (AMY) experiment to measure the GHz emission from air shower plasmas

EPJ Web of Conferences, 2013
The AMY experiment aims to measure the Microwave Bremsstrahlung Radiation (MBR) emitted by air-showers secondary electrons accelerating in collisions with neutral molecules of the atmosphere. The measurements are performed at the Beam Test Facility (BTF)
Smida R., Salina G., Settimo M., Salamida F., Fernandez G. Rodriguez, Rizi V., Riegel M., Petrera S., Privitera P., Perrone L., Monasor M., Martello D., Iarlori M., Luis P. Facal San, Engel R., Creti P., De Mitri I., Di Giulio C., Verzi V., Coluccia M.R., Cataldi G., Bohacova M., Alvarez-Muñiz J., Werner F., Williams C.   +24 more
doaj   +1 more source

Ultra-high energy cosmic rays: 40 years retrospective of continuous observations at the Yakutsk array: Part 1. Cosmic ray spectrum in the energy range 1015–1018 eV and its interpretation

EPJ Web of Conferences, 2015
The experimental data on the cosmic ray energy spectrum obtained from the Small Cherenkov Array in Yakutsk on the measurement of Cherenkov radiation in showers with energy 1015–1018 eV are discussed.
Knurenko Stanislav, Petrov Igor, Petrov Zim, Sleptsov Ivan   +3 more
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The muon content of gamma-ray showers [PDF]

The result of a calculation of the expected number of muons in gamma ray initiated and cosmic ray initiated air showers using a realistic model of hadronic collisions in an effort to understand the available experimental results and to assess the ...
Edwards, P. G., Protheroe, R. J.
core   +1 more source

Ultrahigh-energy Cosmic Rays from Neutrino-emitting Tidal Disruption Events

The Astrophysical Journal
We revisit ultrahigh-energy cosmic-ray (UHECR) production in tidal disruption events (TDEs) in light of recent evidence of neutrino-TDE associations.
Pavlo Plotko, Walter Winter, Cecilia Lunardini, Chengchao Yuan   +3 more
doaj   +1 more source

Effectiveness of Multi-Layered Radiation Shields Constructed from Polyethylene and Metal Hydrides Using HZETRN and OLTARIS for Space Applications [PDF]

فصلنامه علوم و فناوری فضایی
A major challenge for extended human spaceflights in deep space is the dangerous exposure to space radiation. These high-energy particles pose significant risks to astronaut health. To mitigate these risks, effective radiation shielding is essential.
Sreedevi VV, Kavita Lalwani
doaj   +1 more source

Propagation of UHECRs in cosmological backgrounds: some results from SimProp

, 2013
Ultra-High-Energy Cosmic Ray (UHECR) nuclei propagating in cosmological radiation backgrounds produce secondary particles detectable at Earth. SimProp is a one dimensional code for extragalactic propagation of UHECR nuclei, inspired by the kinetic ...
Aloisio, R., Boncioli, D., Di Matteo, A., Grillo, A. F., Petrera, S., Salamida, F.   +5 more
core   +1 more source

On the Potential Cosmogenic Origin of the Ultra-high-energy Event KM3-230213A

The Astrophysical Journal Letters
On 2023 February 13, the KM3NeT/ARCA telescope observed a track-like event compatible with a ultra-high-energy muon with an estimated energy of 120 PeV, produced by a neutrino with an even higher energy, making it the most energetic neutrino event ever ...
O. Adriani, S. Aiello, A. Albert, A. R. Alhebsi, M. Alshamsi, S. Alves Garre, A. Ambrosone, F. Ameli, M. Andre, L. Aphecetche, M. Ardid, S. Ardid, C. Argüelles, J. Aublin, F. Badaracco, L. Bailly-Salins, Z. Bardačová, B. Baret, A. Bariego-Quintana, Y. Becherini, M. Bendahman, F. Benfenati Gualandi, M. Benhassi, M. Bennani, D. M. Benoit, E. Berbee, E. Berti, V. Bertin, P. Betti, S. Biagi, M. Boettcher, D. Bonanno, S. Bottai, A. B. Bouasla, J. Boumaaza, M. Bouta, M. Bouwhuis, C. Bozza, R. M. Bozza, H. Brânzaş, F. Bretaudeau, M. Breuhaus, R. Bruijn, J. Brunner, R. Bruno, E. Buis, R. Buompane, J. Busto, B. Caiffi, D. Calvo, A. Capone, F. Carenini, V. Carretero, T. Cartraud, P. Castaldi, V. Cecchini, S. Celli, L. Cerisy, M. Chabab, A. Chen, S. Cherubini, T. Chiarusi, M. Circella, R. Clark, R. Cocimano, J. A. B. Coelho, A. Coleiro, A. Condorelli, R. Coniglione, P. Coyle, A. Creusot, G. Cuttone, R. Dallier, A. De Benedittis, G. De Wasseige, V. Decoene, P. Deguire, I. Del Rosso, L. S. Di Mauro, I. Di Palma, A. F. Díaz, D. Diego-Tortosa, C. Distefano, A. Domi, C. Donzaud, D. Dornic, E. Drakopoulou, D. Drouhin, J.-G. Ducoin, P. Duverne, R. Dvornický, T. Eberl, E. Eckerová, A. Eddymaoui, T. van Eeden, M. Eff, D. van Eijk, I. El Bojaddaini, S. El Hedri, S. El Mentawi, V. Ellajosyula, A. Enzenhöfer, G. Ferrara, M. D. Filipović, F. Filippini, D. Franciotti, L. A. Fusco, T. Gal, J. García Méndez, A. Garcia Soto, C. Gatius Oliver, N. Geisselbrecht, E. Genton, H. Ghaddari, L. Gialanella, B. K. Gibson, E. Giorgio, I. Goos, P. Goswami, S. R. Gozzini, R. Gracia, C. Guidi, B. Guillon, M. Gutiérrez, C. Haack, H. van Haren, A. Heijboer, L. Hennig, J. J. Hernández-Rey, A. Idrissi, W. Idrissi Ibnsalih, G. Illuminati, O. Janik, D. Joly, M. de Jong, P. de Jong, B. J. Jung, P. Kalaczyński, N. Kamp, J. Keegans, V. Kikvadze, G. Kistauri, C. Kopper, A. Kouchner, Y. Y. Kovalev, L. Krupa, V. Kueviakoe, V. Kulikovskiy, R. Kvatadze, M. Labalme, R. Lahmann, M. Lamoureux, G. Larosa, C. Lastoria, J. Lazar, A. Lazo, S. Le Stum, G. Lehaut, V. Lemaître, E. Leonora, N. Lessing, G. Levi, M. Lindsey Clark, F. Longhitano, F. Magnani, J. Majumdar, L. Malerba, F. Mamedov, A. Manfreda, A. Manousakis, M. Marconi, A. Margiotta, A. Marinelli, C. Markou, L. Martin, M. Mastrodicasa, S. Mastroianni, J. Mauro, K. C. K. Mehta, A. Meskar, G. Miele, P. Migliozzi, E. Migneco, M. L. Mitsou, C. M. Mollo, L. Morales-Gallegos, N. Mori, A. Moussa, I. Mozun Mateo, R. Muller, M. R. Musone, M. Musumeci, S. Navas, A. Nayerhoda, C. A. Nicolau, B. Nkosi, B. Ó Fearraigh, V. Oliviero, A. Orlando, E. Oukacha, L. Pacini, D. Paesani, J. Palacios González, G. Papalashvili, P. Papini, V. Parisi, A. Parmar, E.J. Pastor Gomez, C. Pastore, A. M. Păun, G. E. Păvălaş, S. Peña Martínez, M. Perrin-Terrin, V. Pestel, R. Pestes, M. Petropavlova, P. Piattelli, A. Plavin, C. Poirè, V. Popa, T. Pradier, J. Prado, S. Pulvirenti, C.A. Quiroz-Rangel, N. Randazzo, A. Ratnani, S. Razzaque, I. C. Rea, D. Real, G. Riccobene, J. Robinson, A. Romanov, E. Ros, A. Šaina, F. Salesa Greus, D. F. E. Samtleben, A. Sánchez Losa, S. Sanfilippo, M. Sanguineti, D. Santonocito, P. Sapienza, M. Scaringella, M. Scarnera, J. Schnabel, J. Schumann, H. M. Schutte, J. Seneca, N. Sennan, P. A. Sevle Myhr, I. Sgura, R. Shanidze, A. Sharma, Y. Shitov, F. Šimkovic, A. Simonelli, A. Sinopoulou, B. Spisso, M. Spurio, O. Starodubtsev, D. Stavropoulos, I. Štekl, D. Stocco, M. Taiuti, G. Takadze, Y. Tayalati, H. Thiersen, S. Thoudam, I. Tosta e Melo, B. Trocmé, V. Tsourapis, E. Tzamariudaki, A. Ukleja, A. Vacheret, V. Valsecchi, V. Van Elewyck, G. Vannoye, E. Vannuccini, G. Vasileiadis, F. Vazquez de Sola, A. Veutro, S. Viola, D. Vivolo, A. van Vliet, A. Y. Wen, E. de Wolf, I. Lhenry-Yvon, S. Zavatarelli, A. Zegarelli, D. Zito, J. D. Zornoza, J. Zúniga, N. Zywucka, (The KM3NeT Collaboration)   +292 more
doaj   +1 more source

Where Did the Amaterasu Particle Come From?

The Astrophysical Journal Letters
The Telescope Array Collaboration recently reported the detection of a cosmic-ray particle, “Amaterasu,” with an extremely high energy of 2.4 × 10 ^20 eV. Here we investigate its probable charge and the locus of its production.
Michael Unger, Glennys R. Farrar
doaj   +1 more source