HAWC Study of the Ultra-High-Energy Spectrum of MGRO J1908+06

HAWC Collaboration: A. Albert; R. Alfaro; C. Alvarez; J.D. \'Alvarez,; J.R. Angeles Camacho; J.C. Arteaga-Vel\'azquez; D. Avila Rojas; H.A. Ayala; Solares; R. Babu; E. Belmont-Moreno; C. Brisbois; K.S. Caballero-Mora; T.; Capistr\'an; A. Carrami\~nana; S. Casanova; U. Cotti; J. Cotzomi; S.; Couti\~no de Le\'on; E. De la Fuente; C. de Le\'on; R. Diaz Hernandez; B.L.; Dingus; M.A. DuVernois; M. Durocher; J.C. D\'iaz-V\'elez; K. Engel; C.; Espinoza; K.L. Fan; K. Fang; M. Fern\'andez Alonso; N. Fraija; D. Garcia,; J.A. Garc\'ia-Gonz\'alez; F. Garfias; G. Giacinti; H. Goksu; M.M. Gonz\'alez,; J.A. Goodman; J.P. Harding; J. Hinton; B. Hona; D. Huang; F.; Hueyotl-Zahuantitla; P. H\"untemeyer; A. Iriarte; A. Jardin-Blicq; V. Joshi,; S. Kaufmann; D. Kieda; W.H. Lee; J. Lee; H. Le\'on Vargas; J.T. Linnemann,; A.L. Longinotti; G. Luis-Raya; K. Malone; V. Marandon; O. Martinez; J.; Mart\'inez-Castro; J.A. Matthews; P. Miranda-Romagnoli; J.A. Morales-Soto; E.; Moreno; M. Mostaf\'a; A. Nayerhoda; L. Nellen; M. Newbold; M.U. Nisa; R.; Noriega-Papaqui; L. Olivera-Nieto; N. Omodei; A. Peisker; Y. P\'erez Araujo,; E.G. P\'erez-P\'erez; C.D. Rho; D. Rosa-Gonz\'alez; H. Salazar; F. Salesa; Greus; A. Sandoval; M. Schneider; H. Schoorlemmer; J. Serna-Franco; A.J.; Smith; Y. Son; R.W. Springer; O. Tibolla; K. Tollefson; I. Torres; R.; Torres-Escobedo; R. Turner; F. Ure\~na-Mena; L. Villase\~nor; X. Wang; I.J.; Watson; E. Willox; A. Zepeda; H. Zhou; M. Breuhaus H. Li; and H. Zhang

arXiv:2112.00674·astro-ph.HE·April 7, 2022

HAWC Study of the Ultra-High-Energy Spectrum of MGRO J1908+06

HAWC Collaboration: A. Albert, R. Alfaro, C. Alvarez, J.D. \'Alvarez,, J.R. Angeles Camacho, J.C. Arteaga-Vel\'azquez, D. Avila Rojas, H.A. Ayala, Solares, R. Babu, E. Belmont-Moreno, C. Brisbois, K.S. Caballero-Mora, T., Capistr\'an, A. Carrami\~nana, S. Casanova, U. Cotti

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TL;DR

This paper presents TeV gamma-ray observations of MGRO J1908+06 with HAWC, revealing emission above 200 TeV, primarily leptonic in origin, with potential hadronic contributions, and discusses implications for multi-messenger detection.

Contribution

First detailed TeV gamma-ray study of MGRO J1908+06 extending beyond 200 TeV using HAWC data, with modeling indicating leptonic dominance and possible hadronic components.

Findings

01

Gamma-ray emission extends past 200 TeV.

02

Emission is primarily leptonic, driven by PSR J1907+0602.

03

Potential hadronic contribution depending on model assumptions.

Abstract

We report TeV gamma-ray observations of the ultra-high-energy source MGRO J1908+06 using data from the High Altitude Water Cherenkov (HAWC) Observatory. This source is one of the highest-energy known gamma-ray sources, with emission extending past 200 TeV. Modeling suggests that the bulk of the TeV gamma-ray emission is leptonic in nature, driven by the energetic radio-faint pulsar PSR J1907+0602. Depending on what assumptions are included in the model, a hadronic component may also be allowed. Using the results of the modeling, we discuss implications for detection prospects by multi-messenger campaigns.

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