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Evidence that Ultra-High-Energy Gamma Rays are a Universal Feature Near Powerful Pulsars

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arxiv 2101.07895 v2 pith:IQQQD37T submitted 2021-01-19 astro-ph.HE

Evidence that Ultra-High-Energy Gamma Rays are a Universal Feature Near Powerful Pulsars

HAWC Collaboration , A. Albert , R. Alfaro , C. Alvarez , J.D. \'Alvarez , J.R. Angeles Camacho , J.C. Arteaga-Vel\'azquez , K.P. Arunbabu
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D. Avila Rojas H.A. Ayala Solares V. Baghmanyan E. Belmont-Moreno S.Y. BenZvi 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 R.W. Ellsworth K. Engel C. Espinoza K.L. Fan M. Fern\'andez Alonso N. Fraija A. Galv\'an-G\'amez J.A. Garc\'ia-Gonz\'alez F. Garfias G. Giacinti M.M. Gonz\'alez J.A. Goodman J.P. Harding S. Hernandez B. Hona D. Huang F. Hueyotl-Zahuantitla P. H\"untemeyer A. Iriarte A. Jardin-Blicq V. Joshi D. Kieda A. Lara W.H. Lee J. Lee H. Le\'on Vargas J.T. Linnemann A.L. Longinotti G. Luis-Raya J. Lundeen 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 Y.J. Roh D. Rosa-Gonz\'alez E. Ruiz-Velasco H. Salazar F. Salesa Greus A. Sandoval M. Schneider H. Schoorlemmer J. Serna-Franco A.J. Smith R.W. Springer P. Surajbali M. Tanner K. Tollefson I. Torres R. Torres-Escobedo R. Turner F. Ure\~na-Mena L. Villase\~nor T. Weisgarber E. Willox H. Zhou
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classification astro-ph.HE
keywords emissiongamma-raypulsarspowerfulfeatureextremelygammahigh
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The highest-energy known gamma-ray sources are all located within 0.5 degrees of extremely powerful pulsars. This raises the question of whether ultra-high-energy (UHE; $>$ 56 TeV) gamma-ray emission is a universal feature expected near pulsars with a high spin-down power. Using four years of data from the High Altitude Water Cherenkov (HAWC) Gamma-Ray Observatory, we present a joint-likelihood analysis of ten extremely powerful pulsars to search for UHE gamma-ray emission correlated with these locations. We report a significant detection ($>$ 3$\sigma$), indicating that UHE gamma-ray emission is a generic feature of powerful pulsars. We discuss the emission mechanisms of the gamma rays and the implications of this result. The individual environment that each pulsar is found in appears to play a role in the amount of emission.

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