{"id":17798,"date":"2026-04-23T15:00:00","date_gmt":"2026-04-23T06:00:00","guid":{"rendered":"https:\/\/www.icrr.u-tokyo.ac.jp\/?post_type=event_researcher&#038;p=17798"},"modified":"2026-05-11T12:12:17","modified_gmt":"2026-05-11T03:12:17","slug":"new%e3%80%902026%e5%b9%b43%e6%9c%8819%e6%97%a5%e3%80%91%e3%80%8c%e5%b7%9d%e5%b4%8e%e9%9b%85%e8%a3%95%e5%85%88%e7%94%9f%e3%81%ae%e6%9c%80%e7%b5%82%e8%ac%9b%e7%be%a9%e3%80%8d-%e5%b7%9d%e5%b4%8e-2","status":"publish","type":"event_researcher","link":"https:\/\/www.icrr.u-tokyo.ac.jp\/en\/event_researcher\/17798\/","title":{"rendered":"&#8220;Gamma-Ray Emission from Binaries and Pulsar Wind Nebulae: Probing Particle Acceleration and Flow&#8221;\/ Hongjun An (Chungbuk National University)"},"content":{"rendered":"\n<figure class=\"wp-block-table\"><div class=\"js-scrollable\"><table><tbody><tr><td>\u756a\u53f7<\/td><td>R8-1 \/ &nbsp;IPMU\/ILANCE\/ICRR joint seminar<\/td><\/tr><tr><td>\u65e5\u6642<\/td><td>Thu,April 23,2026 15:00-<\/td><\/tr><tr><td>\u5834\u6240<\/td><td>ICRR 6F Large seminar room<br>Zoom:<a href=\"https:\/\/u-tokyo-ac-jp.zoom.us\/j\/89753963203?pwd=B8EPhmPQZxoyeFc4gtaXmXa2tteFXV.1\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/u-tokyo-ac-jp.zoom.us\/j\/89753963203?pwd=B8EPhmPQZxoyeFc4gtaXmXa2tteFXV.1<\/a>\u00a0<\/td><\/tr><tr><td>\u8b1b\u6f14\u8005<\/td><td>Hongjun An (Chungbuk National University)<\/td><\/tr><tr><td>\u30bf\u30a4\u30c8\u30eb<\/td><td>Gamma-Ray Emission from Binaries and Pulsar Wind Nebulae: Probing Particle Acceleration and Flow<\/td><\/tr><tr><td>\u6982\u8981<\/td><td>Pulsars are the Galaxy&#8217;s most formidable natural particle accelerators, capable of driving leptons to PeV energies. While the initial acceleration begins within the pulsar magnetosphere through induced electric fields, the evolution of these high-energy particles extends deep into the surrounding environment. As the relativistic pulsar wind thermalizes against the interstellar medium, supernova ejecta, or the dense stellar winds of a binary companion, powerful termination shocks are formed. These transition regions serve as secondary acceleration sites, manifesting as diverse and luminous non-thermal phenomena across the electromagnetic spectrum.<br><br>In this seminar, I will explore the complex emission environments of two primary gamma-ray source classes powered by pulsars: high-energy binaries (millisecond and gamma-ray binaries) and pulsar wind nebulae. I will present a multi-wavelength analysis of their X-ray and gamma-ray properties, providing a framework to interpret the physical processes driving their observed spectral and temporal signatures. Specifically, I will detail our recent development of evolutionary multi-zone models designed to track particle transport, flow velocity, and magnetic-field structure in these systems.<br><br>By applying these models to high-energy data from current observatories, we can constrain the magnetic field structure, particle injection spectra, flow dynamics, and their evolution in these cosmic laboratories. Finally, I will discuss the implications of these findings for our broader understanding of Galactic PeVatrons and outline the critical observational data that the next generation of gamma-ray instruments will provide to further unveil the physics of these extreme environments.<\/td><\/tr><\/tbody><\/table><\/div><\/figure>\n","protected":false},"featured_media":0,"template":"","tag_year":[],"class_list":["post-17798","event_researcher","type-event_researcher","status-publish","hentry","en-US"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.icrr.u-tokyo.ac.jp\/en\/event_researcher\/17798\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.2\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ICRR | Institute for Cosmic Ray Research University of Tokyo | \u30de\u30eb\u30c1\u30e1\u30c3\u30bb\u30f3\u30b8\u30e3\u30fc\u306e\u89b3\u6e2c\u3092\u901a\u3058\u3001\u5b87\u5b99\u306e\u8b0e\u306b\u8feb\u308a\u307e\u3059\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\u201cGamma-Ray Emission from Binaries and Pulsar Wind Nebulae: Probing Particle Acceleration and Flow\u201d\/ Hongjun An (Chungbuk National University) | ICRR | Institute for Cosmic Ray Research University of Tokyo\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.icrr.u-tokyo.ac.jp\/en\/event_researcher\/17798\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-04-23T06:00:00+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-05-11T03:12:17+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary\" \/>\n\t\t<meta name=\"twitter:title\" content=\"\u201cGamma-Ray Emission from Binaries and Pulsar Wind Nebulae: Probing Particle Acceleration and Flow\u201d\/ Hongjun An 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