弓形衝擊脈衝星風星雲G359.23-0.82之光譜研究及建立模型


Public Seminar of RPg Student:- Spectral Study and Modeling of the Bow-Shock Pulsar Wind Nebula, G359.23-0.82 (the ‘Mouse’) 
 
A pulsar wind nebula (PWN) is a synchrotron bubble formed around a pulsar due to the interaction between the pulsar wind and the interstellar medium. PWNe are powerful probes to study electrodynamics, as well as relativistic particle acceleration at termination shock. The detailed mechanisms of particle acceleration are still open questions. A bow-shock pulsar wind nebulae, which is the final stage in PWN evolution, is formed when a pulsar moves supersonically in the interstellar medium. One of the most well-known bow-shock PWNe is G359.23-0.82, ‘the Mouse’, which is the brightest bow-shock source and the best example to study bow shocks. It has a bright head, a fainter body and a long and fan-like tail. One way to solve the puzzle about the shock acceleration mechanisms is to study the injected particle distribution. In this project, the speaker measured the multi-wavelength spectrum of ‘the Mouse’ with observations taken from the Very Large Array (VLA), the Giant Metrewave Radio Telescope (GMRT), the Molonglo Observatory Synthesis Telescope (MOST), the Submillimeter Array (SMA), the Berkeley Illinois Maryland Association (BIMA), the Australia Telescope Compact Array (ATCA), and Chandra. The spectrum is fitted with a broken power law and then the physical implications will be discussed. 
 
時間:2018.05.04(五) 15:00
地點:香港大學 莊月明物理樓522室
講者:Yuk Ying CHAN(香港大學) 
語言:英語

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此活動由香港大學物理系主辦。

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