HAWC上高于10 tev的弥漫性伽马射线背景的限制

论文标题

HAWC上高于10 tev的弥漫性伽马射线背景的限制

Limits on the Diffuse Gamma-Ray Background above 10 TeV with HAWC

论文作者

HAWC Collaboration, Albert, A., Alfaro, R., Alvarez, C., Arteaga-Velázquez, J. C., Rojas, D. Avila, Solares, H. A. Ayala, Babu, R., Belmont-Moreno, E., Brisbois, C., Caballero-Mora, K. S., Capistrán, T., Carramiñana, A., Casanova, S., Chaparro-Amaro, O., Cotti, U., Cotzomi, J., de León, S. Coutiño, De la Fuente, E., Hernandez, R. Diaz, Dingus, B. L., DuVernois, M. A., Durocher, M., Díaz-Vélez, J. C., Engel, K., Espinoza, C., Fan, K. L., Alonso, M. Fernández, Fraija, N., Garcia, D., García-González, J. A., Garfias, F., González, M. M., Goodman, J. A., Harding, J. P., Hernandez, S., Hinton, J., Huang, D., Hueyotl-Zahuantitla, F., Hüntemeyer, P., Iriarte, A., Joshi, V., Kaufmann, S., Kieda, D., Lara, A., Lee, W. H., Vargas, H. León, Linnemann, J. T., Longinotti, A. L., Luis-Raya, G., Malone, K., Martinez, O., Martínez-Castro, J., Matthews, J. A., Miranda-Romagnoli, P., Morales-Soto, J. A., Moreno, E., Mostafá, M., Nayerhoda, A., Nellen, L., Newbold, M., Nisa, M. U., Noriega-Papaqui, R., Omodei, N., Peisker, A., Araujo, Y. Pérez, Pérez-Pérez, E. G., Rho, C. D., Rosa-González, D., Ruiz-Velasco, E., Salazar, H., Greus, F. Salesa, Sandoval, A., Schneider, M., Serna-Franco, J., Smith, A. J., Son, Y., Springer, R. W., Tibolla, O., Tollefson, K., Torres, I., Torres-Escobedo, R., Turner, R., Ureña-Mena, F., Villaseñor, L., Wang, X., Willox, E., Zhou, H., de León, C., Álvarez, J. D.

论文摘要

高能弥漫性γ射线背景（DGRB）预计将由未分解的各向同性分布的天体物理对象产生，可能包括银河系或外乳术结构中的暗物质歼灭或衰减排放。 DGRB仅在1 TEV以下观察到。在此能量之上，已经报道了上限。在此能量上方的DGRB上的观察结果或严格的限制可能具有重要的多通间含义，例如限制IceCube检测到的TEV-PEV天体中微子的起源。高空水切伦科夫（HAWC）天文台位于墨西哥中部的海平面4100 m，对从几百GEV到数百个TEV的伽马射线敏感，并不断观察广泛的视野（2 SR）。 HAWC凭借其高能范围和大面积的覆盖范围，非常适合在TEV Energies上提高对DGRB的搜索。在这项工作中，严格的削减已被应用于HAWC数据集，以更好地隔离背景式HADRONIC淋浴的伽马射线阵雨。然后使用535天的螃蟹数据和蒙特卡洛模拟对DGRB的敏感性进行了验证，从而导致DGRB上10个TEV以上的新限制以及对多通讯生研究的前瞻性含义。

The high-energy Diffuse Gamma-Ray Background (DGRB) is expected to be produced by unresolved isotropically distributed astrophysical objects, potentially including dark matter annihilation or decay emissions in galactic or extragalactic structures. The DGRB has only been observed below 1 TeV; above this energy, upper limits have been reported. Observations or stringent limits on the DGRB above this energy could have significant multi-messenger implications, such as constraining the origin of TeV-PeV astrophysical neutrinos detected by IceCube. The High Altitude Water Cherenkov (HAWC) Observatory, located in central Mexico at 4100 m above sea level, is sensitive to gamma rays from a few hundred GeV to several hundred TeV and continuously observes a wide field-of-view (2 sr). With its high-energy reach and large area coverage, HAWC is well-suited to notably improve searches for the DGRB at TeV energies. In this work, strict cuts have been applied to the HAWC dataset to better isolate gamma-ray air showers from background hadronic showers. The sensitivity to the DGRB was then verified using 535 days of Crab data and Monte Carlo simulations, leading to new limits above 10 TeV on the DGRB as well as prospective implications for multi-messenger studies.

下载PDF全文

下载文献需遵守相关版权规定

论文标题