Constraints on the Emission of Gamma-Rays from M31 with HAWC

Albert, A.; Alfaro, R.; Alvarez, C.; Arteaga-Velazquez, J. C.; Arunbabu, K. P.; Avila Rojas, D.; Solares, H. A. Ayala; Belmont-Moreno, E.; BenZvi, S. Y.; Brisbois, C.; Caballero-Mora, K. S.; Capistran, T.; Carraminana, A.; Casanova, S.; Cotti, U.; Cotzomi, J.; Coutino de Leon, S.; De la Fuente, E.; de Leon, C.; Dichiara, S.; Dingus, B. L.; DuVernois, M. A.; Engel, K.; Espinoza, C.; Fleischhack, H.; Fraija, N.; Galvan-Gamez, A.; Garcia-Aguilar, D.; Garcia-Gonzalez, J. A.; Garfias, F.; Gonzalez, M. M.; Goodman, J. A.; Harding, J. P.; Hernandez, S.; Hona, B.; Huang, D.; Hueyotl-Zahuantitla, F.; Huntemeyer, P.; Iriarte, A.; Jardin-Blicq, A.; Joshi, V.; Kieda, D.; Lee, W. H.; Leon Vargas, H.; Longinotti, A. L.; Luis-Raya, G.; Malone, K.; Marinelli, S. S.; Martinez, O.; Martinez-Castellanos, I; Martinez-Castro, J.; Matthews, J. A.; Miranda-Romagnoli, P.; Morales-Soto, J. A.; Moreno, E.; Mostafa, M.; Nayerhoda, A.; Nellen, L.; Newbold, M.; Noriega-Papaqui, R.; Peisker, A.; Perez-Perez, E. G.; Ren, Z.; Rho, C. D.; Rosa-Gonzalez, D.; Rosenberg, M.; Rubenzahl, R.; Salazar, H.; Greus, F. Salesa; Sandoval, A.; Schneider, M.; Sinnis, G.; Smith, A. J.; Springer, R. W.; Surajbali, P.; Tabachnick, E.; Tibolla, O.; Tollefson, K.; Torres, I; Villasenor, L.; Wood, J.; Yapici, T.; Zepeda, A.; Zhou, H.

doi:10.3847/1538-4357/ab7999

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Constraints on the Emission of Gamma-Rays from M31 with HAWC

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Jardin-Blicq, A.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Joshi, V.
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velazquez, J. C., Arunbabu, K. P., Avila Rojas, D., et al. (2020). Constraints on the Emission of Gamma-Rays from M31 with HAWC. Astrophysical Journal, 893(1): 16. doi:10.3847/1538-4357/ab7999.

Cite as: https://hdl.handle.net/21.11116/0000-0008-2137-5

Abstract

Cosmic rays, along with stellar radiation and magnetic fields, are known to make up a significant fraction of the energy density of galaxies such as the Milky Way. When cosmic rays interact in the interstellar medium, they produce gamma-ray emission which provides an important indication of how the cosmic rays propagate. Gamma-rays from the Andromeda galaxy (M31), located 785 kpc away, provide a unique opportunity to study cosmic-ray acceleration and diffusion in a galaxy with a structure and evolution very similar to the Milky Way. Using 33 months of data from the High Altitude Water Cherenkov Observatory, we search for teraelectronvolt gamma-rays from the galactic plane of M31. We also investigate past and present evidence of galactic activity in M31 by searching for Fermi bubble-like structures above and below the galactic nucleus. No significant gamma-ray emission is observed, so we use the null result to compute upper limits on the energy density of cosmic rays >10 TeV in M31.