메뉴 건너뛰기

제목   The Plasma-Physics of AGN on (Sub)Parsec Scales

연사  Sasacha Trippe 교수님 (서울대학교)

언어 :  English


요약

     "The Korean VLBI Network (KVN) is capable of simultaneous multi-frequency full polarization observation observations. This makes the KVN ideal for studying the jet physics of radio-bright active galactic nuclei, especially blazars.

   Firstly, I present results of a monitoring study of BL Lacertae from 2013 to 2016. BL Lac's radio core shows an exponential decay of brightness over time, with the decay time scale depending on frequency. The resulting scaling law suggests that the (sub-)mm radio core is a standing re-collimation shock.

   Secondly, I present the first systematic study of multi-frequency blazar polarization with KVN. We have been able to obtain high-quality linear polarization data for several sources, with typical degrees of polarization being on the order of few per cent. Faraday rotation measures (RM), which probe particle densities and magnetic field strengths, are on the order of thousands of of rad per square meter. The evolution of RM with frequency suggests that jet bases are either spherical or conical."

번호 제목 글쓴이 날짜 조회 수
공지 [5/26] 근지구환경 관측을 위한 나노위성, SNIPE mission [2] webmaster 2017.05.24 86
공지 [5/19] Neutrinos and Cosmic Web with Large-Volume Surveys webmaster 2017.05.17 156
» [5/12] The Plasma-Physics of AGN on (Sub)Parsec Scales webmaster 2017.05.11 79
공지 [4/28] Nuclear Rings, Nuclear Spirals, and Mass Accretion to Supermassive Black Holes in Disk Galaxies. webmaster 2017.04.27 137
공지 [4/14] Challenging Space Smart, 쎄트렉아이의 우주 미션 소개 webmaster 2017.04.13 461
공지 [4/7] Observational Evidence for the Coevolution between Supermassive Black Holes and Host Galaxies webmaster 2017.04.04 434
공지 [4/3] The gas cycle of galaxies across environments webmaster 2017.03.28 359
공지 [3/24] National Space Situational Awareness Initiative webmaster 2017.03.20 2227
공지 [3/17] A New Paradigm for Star Formation: Episodic Accretion webmaster 2017.03.15 1044
공지 [3/10] Neutrino Oscillation Measurement webmaster 2017.03.08 1128
36 [12/16] Herschel and Millimeter Observations of Supernova Remnants webmaster 2016.12.05 676
35 [12/13] Galaxy Transformation in the local Universe webmaster 2016.12.05 676
34 [12/2] Intensive Monitoring of Nearby Galaxies and Early light curve of Supernovae webmaster 2016.11.29 986
33 [11/25] 활동성 블랙홀의 가스분출과 별생성 webmaster 2016.11.22 1062
32 [11/18] Study of sparse star clusters and metallicity distribution in the Large Magellanic Cloud webmaster 2016.11.15 687
31 [10/28] 힉스 입자와 우주 webmaster 2016.10.24 836
30 [10/21] Small nascent galaxies in the debris of interacting systems webmaster 2016.10.18 768
29 [10/14] Relativistic Geodesy - Numerical simulation of the Post-Newtonian Equations of Motion webmaster 2016.10.07 763
28 [10/04] LSST and the physics of the dark universe webmaster 2016.10.04 1020
27 [9/30] Testing the statistical isotropy using dipolar modulation in galaxy number counts webmaster 2016.09.30 1352