korean english


Home > 게시판 > 세미나

아래와 같이 콜로퀴움을 개최하오니 많이 참석해 주시기 바랍니다.

4시 20분부터 제1과학관 31214 e+강의실에서 간단한 다과를 제공합니다.

                       아      래

Title: At the End of Space and Time: Imaging the Black Hole in M 87

Speaker: Prof. Sascha Trippe (서울대학교)

Date & Time: Nov. 20. (Wed.) 2019 4:30 PM

Place: Natural Science 1,  Room No. 31214

Abstract: Supermassive black holes are the power sources of active galactic nuclei. The central black hole of Messier 87 (M 87) has an angular diameter of about 8 micro-arcsec and, due to strong gravitational lensing, a photon ring angular diameter of about 40 micro-arcsec. This size can be resolved by global radio interferometric arrays observing at frequencies of 230 GHz or higher. In April 2017, the Event Horizon Telescope (EHT) observed the black hole in M 87 for several days. The resulting image shows an asymmetric photon ring which is fully consistent with the expectations from general relativity, as tested by comparison to a large library of models from general relativistic ray tracing.The black hole mass is found to be about 6.5 billion solar masses, in good agreement with previous estimates from stellar dynamics but inconsistent with previous estimates using gas dynamics. EHT observations of M 87 are supposed to continue in spring 2020 with several additional telescopes, possibly including SNU's SRAO.

번호 제목 날짜 조회 수
공지 2022학년도 1학기 콜로퀴움 일정 2022.01.10 26851
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 967469
365 <Sep. 8(Wed.)> Utilizing physics to build a trapped-ion quantum computer 2021.09.01 8083
364 2021학년도 2학기 콜로퀴움 일정 2021.07.01 104457
363 <May 12(Wed.)> Nanomechanical oscillators for quantum technology 2021.05.06 13304
362 <April 28(Wed.)> 손에 잡히는 AI 2021.04.21 8607
361 <April 21(Wed.)> 우주배경복사 편광 관측 - 남극점 기지 바이셉/켁 어레이(BICEP/Keck Array) 망원경 2021.04.12 8100
360 <April 7(Wed.)> Mid-scale facilities for condensed matter research: high magnetic field and neutron scattering 2021.03.31 33770
359 <Mar.31(Wed.)> Nonlinear nanophotonics using on-chip microring resonator 2021.03.25 25146
358 <Mar.24(Wed.)> A tale of quantum magnets 2021.03.18 33410
357 <Mar.17(Wed.)> Glue spectrum for superconductivity obtained via optical spectroscopy 2021.03.10 21724
356 <Mar.10(Wed.)> Dark matter searches in neutrino detectors 2021.03.04 30820
355 <Mar.3(Wed.)>Scaling laws in Natural Language Processing 2021.02.25 116235
354 2021학년도 1학기 콜로퀴움 일정 2021.01.13 121954
353 <Dec.9(Wed.)>한국형 암흑물질 실험 2020.12.02 13498
352 <Dec.2(Wed.)>The era of gravitational waves, and the science that makes it possible 2020.11.25 30082
351 <Nov.18(Wed.)>When Physics meets the Living Cells 2020.11.11 48211
350 <Nov.11(Wed.)>Nonlinear optics to study charge, spin, and crystalline structures 2020.11.04 25025
349 <Nov.4(Wed.)>Progresses in Elucidating the Optoelectronic Properties of Perovskite Semiconductor 2020.10.28 41184
348 <Oct.28(Wed.)> Physics of Global Warming 2020.10.22 31841
347 <Oct.14(Wed.)>New Ways to Search for the Dark World 2020.10.12 14045
346 <Oct.7(Wed.)>Organic Photodiode for Image Sensor 2020.09.24 40986