Particle Acceleration in the Cygnus Superbubble

Abeysekara AU, Albert A, Alfaro R, Alvarez C, Álvarez JD, Angeles Camacho JR, Arteaga-Velázquez JC, Arunbabu KP, Avila Rojas D, Ayala Solares HA, Babu R, Baghmanyan V, Barber AS, Becerra Gonzalez J, Belmont-Moreno E, BenZvi SY, Berley D, Brisbois C, Caballero-Mora KS, Capistrán T, Carramiñana A, Casanova S, Chaparro-Amaro O, Cotti U, Cotzomi J, Coutiño de León S, De la Fuente E, de León C, Diaz-Cruz L, Diaz Hernandez R, Díaz-Vélez JC, Dingus BL, Durocher M, DuVernois MA, Ellsworth RW, Engel K, Espinoza C, Fan KL, Fang K, Fernández Alonso M, Fick B, Fleischhack H, Flores JL, Fraija NI, Garcia D, García-González JA, García-Luna JL, García-Torales G, Garfias F, Giacinti G, Goksu H, González MM, Goodman JA, Harding JP, Hernandez S, Herzog I, Hinton J, Hona B, Huang D, Hueyotl-Zahuantitla F, Hui CM, Humensky B, Hüntemeyer P, Iriarte A, Jardin-Blicq A, Jhee H, Joshi V, Kieda D, Kunde GJ, Kunwar S, Lara A, Lee J, Lee WH, Lennarz D, León Vargas H, Linnemann J, Longinotti AL, López-Coto R, Luis-Raya G, Lundeen J, Malone K, Marandon V, Martinez O, Martinez-Castellanos I, Martínez-Huerta H, Martínez-Castro J, Matthews JA, McEnery J, Miranda-Romagnoli P, Morales-Soto JA, Moreno E, Mostafá M, Nayerhoda A, Nellen L, Newbold M, Nisa MU, Noriega-Papaqui R, Olivera-Nieto L, Omodei N, Peisker A, Pérez Araujo Y, Pérez-Pérez EG, Rho CD, Rivière C, Rosa-Gonzalez D, Ruiz-Velasco E, Ryan J, Salazar H, Salesa Greus F, Sandoval A, Schneider M, Schoorlemmer H, Serna-Franco J, Sinnis G, Smith AJ, Springer RW, Surajbali P, Taboada I, Tanner M, Tollefson K, Torres I, Torres-Escobedo R, Turner R, Ureña-Mena F, Villaseñor L, Wang X, Watson IJ, Weisgarber T, Werner F, Willox E, Wood J, Yodh GB, Zepeda A, Zhou H (2022)

Publication Type: Conference contribution

Publication year: 2022

Journal

Publisher: Sissa Medialab Srl

Book Volume: 395

Conference Proceedings Title: Proceedings of Science

Event location: Virtual, Berlin, DEU

Abstract

The Cygnus Cocoon is the first gamma-ray superbubble powered by a massive stellar association, the OB2 association. It was postulated that the combined effects of the stellar winds of all the massive O-type stars of the OB2 association can accelerate the cosmic rays to PeV energy in the Cocoon. The conclusive proof of acceleration to PeV energy in the Cocoon will identify the stellar association as a PeV cosmic-ray accelerator, known as PeVatron. However, the Cocoon has been previously studied only up to 10 TeV. In this contribution, using 1343 days of High Altitude Water Cherenkov (HAWC) observatory data, we present the morphological and spectral study of the Cocoon above 1 TeV to beyond 100 TeV. The analysis at higher TeV energies reveals a softer spectrum compared to the GeV gamma-ray observation. This result suggests that the accelerator's efficiency decreases around hundreds of TeV, or after being accelerated, the highest-energy protons escape the region. The study above 10 TeV presented here demonstrates how CR accelerators operate in these extreme energies and how particle transport impacts high-energy emission.

Authors with CRIS profile

Involved external institutions

University of Utah United States (USA) (US) Los Alamos National Laboratory United States (USA) (US) National Autonomous University of Mexico / Universidad Nacional Autónoma de México (UNAM) Mexico (MX) Universidad Autónoma de Chiapas (UNACH) Mexico (MX) Universidad Michoacana de San Nicolás de Hidalgo (UMSNH) Mexico (MX) Pennsylvania State University (Penn State) United States (USA) (US) Michigan Technological University United States (USA) (US) Institute of Nuclear Physics Polish Academy of Sciences / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego Polskiej Akademii Nauk Poland (PL) National Aeronautics and Space Administration (NASA) United States (USA) (US) University of Rochester (UR) United States (USA) (US) University of Maryland, College Park (UMD) United States (USA) (US) National Institute of Astrophysics, Optics and Electronics / Instituto Nacional de Astrofísica, Óptica y Electrónica (INAOE) Mexico (MX) National Polytechnic Institute of Mexico / Instituto Politécnico Nacional de México Mexico (MX) Benemérita Universidad Autónoma de Puebla (BUAP) / Meritorious Autonomous University of Puebla Mexico (MX) Universidad de Guadalajara (UDEG) Mexico (MX) Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics Germany (DE) University of Wisconsin - Madison United States (USA) (US) Tecnológico de Monterrey (ITESM) Mexico (MX) University of Seoul (UOS) / 서울시립대학교 Korea, Republic of (KR) Michigan State University United States (USA) (US) National Institute for Nuclear Physics / Istituto Nazionale di Fisica Nucleare (INFN) Italy (IT) Universidad Politécnica de Pachuca (UPP) Mexico (MX) Universidad de Monterrey (UDEM) Mexico (MX) University of New Mexico (UNM) / Universidad de Nuevo México United States (USA) (US) Georgia Institute of Technology United States (USA) (US) Autonomous University of the State of Hidalgo / Universidad Autónoma del Estado de Hidalgo Mexico (MX) Stanford University United States (USA) (US) University of New Hampshire United States (USA) (US) Shanghai Jiao Tong University / 上海交通大学 China (CN) University of California Irvine United States (USA) (US)

How to cite

APA:

Abeysekara, A.U., Albert, A., Alfaro, R., Alvarez, C., Álvarez, J.D., Angeles Camacho, J.R.,... Zhou, H. (2022). Particle Acceleration in the Cygnus Superbubble. In Proceedings of Science. Virtual, Berlin, DEU: Sissa Medialab Srl.

MLA:

Abeysekara, A. U., et al. "Particle Acceleration in the Cygnus Superbubble." Proceedings of the 37th International Cosmic Ray Conference, ICRC 2021, Virtual, Berlin, DEU Sissa Medialab Srl, 2022.

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