PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Gamma-ray Astronomy (GA)
HAWC observations of microquasars as powerful particle accelerators
 Hawc, A. Albert, R.J. Alfaro, C. Alvarez, A. Andres, J.C. Arteaga Velazquez, D.O. Avila Rojas, H.A. Ayala Solares, R. Babu, E. Belmont-Moreno, T. Capistrán Rojas, S. Yun, A. Carramiñana, F. Carreon-Gonzalez, U. Cotti, J. Cotzomi, S. Coutiño de León, E. de la Fuente, D. Depaoli, C.L. de León, R. Diaz Hernandez, J.C. Díaz Vélez, B. Dingus, M. Durocher, M. DuVernois, K. Engel, M.C. Espinoza Hernández, J. Fan, K. Fang, N.I. Fraija, J.A. Garcia-Gonzalez, F. Garfias, H. Goksu, M.M. González, J.A. Goodman, S.J. Groetsch, J.P. Harding, S. Hernández Cadena, I. Herzog, J. Hinton, B. Hona, D. Huang, F. Hueyotl-Zahuantitla, P. Hüntemeyer, A. Iriarte, V. Joshi, S. Kaufmann, D. Kieda, A. Lara, J. Lee, W.H. Lee, H. Leon Vargas, J. Linnemann, A.L. Longinotti, G. Luis-Raya, K. Malone, J. Martínez-Castro, J. Matthews, P. Miranda-Romagnoli, J.A. Montes, J.A. Morales Soto, M. Mostafa, L. Nellen, M.U. Nisa, R. Noriega-Papaqui, L. Olivera-Nieto, N. Omodei, Y. Pérez Araujo, E.G. Pérez Pérez, A. Pratts, C.D. Rho, D. Rosa-Gonzalez, E. Ruiz-Velasco, H.I. Salazar, D. Salazar-Gallegos, A. Sandoval, M. Schneider, G. Schwefer, J. Serna-Franco, A.J. Smith, Y. Yon, W.R. Springer, O. Tibolla, K. Tollefson, I. Torres, R. Torres Escobedo, R.M. Turner, F. Ureña-Mena, E. Varela, L. Villaseñor, X. Wang*, I.J. Watson, F. Werner, K. Whitaker, E.J. Willox, H. Hongyi Wu, H. Zhou and K.S. Caballero Moraet al. (click to show)
Full text: pdf
Pre-published on: July 25, 2023
Published on: —
Abstract
Microquasars are one of the classes of powerful Galactic particle accelerators that emit gamma
rays beyond multi-TeV energies. Recently, gamma-ray emission above tens of TeV has been
detected from some of these objects. The High Altitude Water Cherenkov (HAWC) observatory
has previously reported gamma-ray emission with a median energy of 25 TeV from the microquasar
SS 433, suggesting that gamma-ray binaries can accelerate particles to above 100 TeV inside the
jets. With 2,321 days of data and better reconstruction algorithms, theHAWC observatory detected
emissions above 20 TeV from two other binaries, V4641 Sagittarii and LS 5039. The V4641 Sgr
is detected with a significance great than 9 sigma. It’s a low-mass X-ray binary(LMXB) that has
been observed with a small-scale jet-like structure in the radio wavelength. In this talk, I will
present the preliminary results from V4641 Sgr and discuss possible scenarios for gamma-ray
production. We will also present future plans to search for additional X-ray binaries with HAWC.
DOI: https://doi.org/10.22323/1.444.0797
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