Colloquium

  • Understanding Astrophysical Compact Objects Using High-Energy Observations (고에너지 관측을 통한 밀집성의 이해)

  • Speaker : 안홍준 / Hongjun An
    Affiliation : Department of Astronomy and Space Science, Chungbuk National University
    Date : November 29, 2017 4:00 PM
    Place : Building 110 Room N103
    Contact : kkwak@unist.ac.kr
    Host : Kyujin Kwak
  • Abstract

  • In this talk, I will discuss high-energy astrophysics. I will first introduce high-energy telescopes operating in the kilo-electron volts to giga-electron volts and then talk about observations that can be made with the telescopes. Because high-energy emission can be produced only by very energetic particles, detection of high-energy photons implies that there are energetic particles near the detection sites, likely astrophysical compact objects. Properties of the particles and their transport can be inferred via detailed imaging/timing/spectroscopic observations and allow us to study physical conditions in and around the astrophysical compact objects. Although there are various high-energy emitting objects in the Universe, I will focus on several such objects including neutron stars, pulsar wind nebulae (PWNe), and supermassive black holes. I will discuss basic physics and heuristic models to understand them, and talk about what we have learned until now. Future challenges will be discussed briefly.