Galactic Gamma-Ray Diffuse Emission at TeV Energies with HAWC Data

Alfaro R, Alvarez C, Arteaga-Velázquez JC, Arunbabu KP, Rojas DA, Babu R, Baghmanyan V, Belmont-Moreno E, Brisbois C, Caballero-Mora KS, Capistrán T, Carramiñana A, Casanova S, Chaparro-Amaro O, Cotti U, Cotzomi J, de León SC, De la Fuente E, Diaz Hernandez R, DuVernois MA, Durocher M, Díaz-Vélez JC, Engel K, Espinoza C, Fan KL, Fraija N, Galván-Gámez A, García-González JA, Garfias F, González MM, Goodman JA, Hernandez S, Hona B, Huang D, Hueyotl-Zahuantitla F, Humensky TB, Iriarte A, Joshi V, Kaufmann S, Kieda D, Kunde GJ, Lara A, Vargas HL, Linnemann JT, Longinotti AL, Luis-Raya G, Malone K, Martinez O, Martínez-Castro J, Matthews JA, Miranda-Romagnoli P, Moreno E, Mostafá M, Nayerhoda A, Nellen L, Noriega-Papaqui R, Pérez-Pérez EG, Rosa-González D, Ruiz-Velasco E, Salazar H, Salazar-Gallegos D, Salesa Greus F, Sandoval A, Serna-Franco J, Smith AJ, Springer RW, Tibolla O, Tollefson K, Torres I, Torres-Escobedo R, Ureña-Mena F, Villaseñor L, Willox E, Zhou H, de León C, Fornieri O, Gaggero D, Grasso D, Marinelli A, Ventura S (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 961

Article Number: 104

Journal Issue: 1

DOI: 10.3847/1538-4357/ad00b6

Abstract

Galactic gamma-ray diffuse emission (GDE) is emitted by cosmic rays (CRs), ultra-relativistic protons, and electrons, interacting with gas and electromagnetic radiation fields in the interstellar medium. Here we present the analysis of teraelectronvolt diffuse emission from a region of the Galactic plane over the range in longitude of l ∈ [43°, 73°], using data collected with the High Altitude Water Cherenkov (HAWC) detector. Spectral, longitudinal, and latitudinal distributions of the teraelectronvolt diffuse emission are shown. The radiation spectrum is compatible with the spectrum of the emission arising from a CR population with an index similar to that of the observed CRs. When comparing with the DRAGON base model, the HAWC GDE flux is higher by about a factor of 2. Unresolved sources such as pulsar wind nebulae and teraelectronvolt halos could explain the excess emission. Finally, deviations of the Galactic CR flux from the locally measured CR flux may additionally explain the difference between the predicted and measured diffuse fluxes.

Authors with CRIS profile

Involved external institutions

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) St. Albert's College India (IN) Michigan Technological University United States (USA) (US) Institute of Nuclear Physics PAN / Instytut Fizyki Jądrowej im. Henryka Niewodniczańskiego PAN Poland (PL) University of Maryland 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) University of Wisconsin - Madison United States (USA) (US) Universidad de Guadalajara (UDEG) Mexico (MX) University of New Mexico (UNM) / Universidad de Nuevo México United States (USA) (US) Autonomous University of the State of Hidalgo / Universidad Autónoma del Estado de Hidalgo Mexico (MX) Los Alamos National Laboratory United States (USA) (US) Pennsylvania State University (Penn State) United States (USA) (US) Universidad Politécnica de Pachuca (UPP) Mexico (MX) Michigan State University United States (USA) (US) University of Utah United States (USA) (US) Tecnológico de Monterrey (ITESM) Mexico (MX)

How to cite

APA:

Alfaro, R., Alvarez, C., Arteaga-Velázquez, J.C., Arunbabu, K.P., Rojas, D.A., Babu, R.,... Ventura, S. (2024). Galactic Gamma-Ray Diffuse Emission at TeV Energies with HAWC Data. Astrophysical Journal, 961(1). https://doi.org/10.3847/1538-4357/ad00b6

MLA:

Alfaro, R., et al. "Galactic Gamma-Ray Diffuse Emission at TeV Energies with HAWC Data." Astrophysical Journal 961.1 (2024).

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