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arXiv · 1703.01344

Search for Very High Energy Gamma Rays from the Northern $\textit{Fermi}$ Bubble Region with HAWC

A. U. Abeysekara·A. Albert·R. Alfaro·C. Alvarez·J. D. Álvarez·R. Arceo·J. C. Arteaga-Velázquez·H. A. Ayala Solares·A. S. Barber·N. Bautista-Elivar·A. Becerril·E. Belmont-Moreno·S. Y. BenZvi·D. Berley·J. Braun·C. Brisbois·K. S. Caballero-Mora·T. Capistrán·A. Carramiñana·S. Casanova·M. Castillo·U. Cotti·J. Cotzomi·S. Coutiño de León·C. De León·E. De la Fuente·R. Diaz Hernandez·B. L. Dingus·M. A. DuVernois·J. C. Díaz-Vélez·R. W. Ellsworth·K. Engel·B. Fick·D. W. Fiorino·H. Fleischhack·N. Fraija·J. A. García-González·F. Garfias·M. Gerhardt·A. González Muñoz·M. M. González·J. A. Goodman·Z. Hampel-Arias·J. P. Harding·S. Hernandez·A. Hernandez-Almada·J. Hinton·B. Hona·C. M. Hui·P. Hüntemeyer·A. Iriarte·A. Jardin-Blicq·V. Joshi·S. Kaufmann·D. Kieda·A. Lara·R. J. Lauer·W. H. Lee·D. Lennarz·H. León Vargas·J. T. Linnemann·A. L. Longinotti·G. Luis Raya·R. Luna-García·R. López-Coto·K. Malone·S. S. Marinelli·O. Martinez·I. Martinez-Castellanos·J. Martínez-Castro·H. Martínez-Huerta·J. A. Matthews·P. Miranda-Romagnoli·E. Moreno·M. Mostafá·L. Nellen·M. Newbold·M. U. Nisa·R. Noriega-Papaqui·R. Pelayo·J. Pretz·E. G. Pérez-Pérez·Z. Ren·C. D. Rho·C. Rivière·D. Rosa-González·M. Rosenberg·E. Ruiz-Velasco·H. Salazar·F. Salesa Greus·A. Sandoval·M. Schneider·H. Schoorlemmer·G. Sinnis·A. J. Smith·R. W. Springer·P. Surajbali·I. Taboada·O. Tibolla·K. Tollefson
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Abstract

We present a search of very high energy gamma-ray emission from the Northern $\textit{Fermi}$ Bubble region using data collected with the High Altitude Water Cherenkov (HAWC) gamma-ray observatory. The size of the data set is 290 days. No significant excess is observed in the Northern $\textit{Fermi}$ Bubble region, hence upper limits above $1\,\text{TeV}$ are calculated. The upper limits are between $3\times 10^{-7}\,\text{GeV}\, \text{cm}^{-2}\, \text{s}^{-1}\,\text{sr}^{-1}$ and $4\times 10^{-8}\,\text{GeV}\,\text{cm}^{-2}\,\text{s}^{-1}\,\text{sr}^{-1}$. The upper limits disfavor a proton injection spectrum that extends beyond $100\,\text{TeV}$ without being suppressed. They also disfavor a hadronic injection spectrum derived from neutrino measurements.

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A. U. Abeysekara, A. Albert, R. Alfaro, C. Alvarez, J. D. Álvarez, R. Arceo, J. C. Arteaga-Velázquez, H. A. Ayala Solares, A. S. Barber, N. Bautista-Elivar, A. Becerril, E. Belmont-Moreno, S. Y. BenZvi, D. Berley, J. Braun, C. Brisbois, K. S. Caballero-Mora, T. Capistrán, A. Carramiñana, S. Casanova, M. Castillo, U. Cotti, J. Cotzomi, S. Coutiño de León, C. De León, E. De la Fuente, R. Diaz Hernandez, B. L. Dingus, M. A. DuVernois, J. C. Díaz-Vélez, R. W. Ellsworth, K. Engel, B. Fick, D. W. Fiorino, H. Fleischhack, N. Fraija, J. A. García-González, F. Garfias, M. Gerhardt, A. González Muñoz, M. M. González, J. A. Goodman, Z. Hampel-Arias, J. P. Harding, S. Hernandez, A. Hernandez-Almada, J. Hinton, B. Hona, C. M. Hui, P. Hüntemeyer, A. Iriarte, A. Jardin-Blicq, V. Joshi, S. Kaufmann, D. Kieda, A. Lara, R. J. Lauer, W. H. Lee, D. Lennarz, H. León Vargas, J. T. Linnemann, A. L. Longinotti, G. Luis Raya, R. Luna-García, R. López-Coto, K. Malone, S. S. Marinelli, O. Martinez, I. Martinez-Castellanos, J. Martínez-Castro, H. Martínez-Huerta, J. A. Matthews, P. Miranda-Romagnoli, E. Moreno, M. Mostafá, L. Nellen, M. Newbold, M. U. Nisa, R. Noriega-Papaqui, R. Pelayo, J. Pretz, E. G. Pérez-Pérez, Z. Ren, C. D. Rho, C. Rivière, D. Rosa-González, M. Rosenberg, E. Ruiz-Velasco, H. Salazar, F. Salesa Greus, A. Sandoval, M. Schneider, H. Schoorlemmer, G. Sinnis, A. J. Smith, R. W. Springer, P. Surajbali, I. Taboada, O. Tibolla, K. Tollefson. 2017-03-03. Search for Very High Energy Gamma Rays from the Northern $\textit{Fermi}$ Bubble Region with HAWC. https://doi.org/10.3847/1538-4357/aa751a

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