The detection of the black hole shadow in M87 by the Event Horizon Telescope (EHT) observations provided us powerful evidence of the presence of supermassive black holes. The big and fundamental questions, however, still remain: the magnitude and orientation of the black hole spin, physics of accretion flows, formation mechanism of relativistic jets, cosmic-ray acceleration, and associated gamma-ray and neutrino emission, etc. In order to address these key questions, the VLBI observations with higher resolution and the multi-wavelength/multi-messenger observation will be strong tools.
The workshop will bring researchers working on observation and theory/simulations to discuss our present understanding and key questions towards the future of the spacetime of black holes, the physics of accretion flow, jets, winds, and the related high energy phenomena around compact objects.
Due to the situation of the COVID-19, the workshop will be a hybrid-type (i.e., on-line and on-site, simultaneously). All of the talks and the posters are given by on-line, and participants can also join the workshop on-cite if they hope (but the number of on-site-participants is limited because of the social distancing rule).
This workshop is supported by the Collaborative Research Program of the Institute for Cosmic Ray Research, the University of Tokyo.
Invited speakers: Key words
- K. Asada (ASIAA): GLT, EAVN-high, and next generation EHT
- I. Cho (KASI): EAVN observation of Sgr A$^*$
- K. Hada (NAOJ/Mizusawa): Multiwavelength observation of M87
- M. Hoshino (Tokyo) : PIC simulations in accretion flows
- M. Giroletti (INAF): Observation of transient events with VLBI
- K. Hotokezaka (Tokyo): Theory of EM counterpart of GW events
- A. Levinson (Tel Aviv): General relativistic PIC simulations
- M. Machida (NAOJ): MHD simulations of radiatively inefficient accretion flows
- K. Murase (Penn State/Kyoto): Multi-messenger study on AGNs (theory)
- H. Nagai (NAOJ): ALMA and ngVLA
- H. Noda (Osaka): XRISM & synergy between X-ray and EHT observation
- D. Paneque (MPP): VHE gamma-ray, multi-messenger study on AGNs (observation)
- J. Park (ASIAA): Observation of polarized radio emission in M87
- H-Y. Pu (NTNU): Models of jets & accretion flows, and GRRT calculations
- H. R. Takahashi (Komazawa): General relativistic radiation MHD simulations
- M. Teshima (ICRR/MPP): CTA and astroparticle physics
- S. Trippe (SNU): KVN observation of AGNs with polarized emission
Jan. 18 (Mon.)
Session 1: MWL and Multi-Messenger Study on AGNs (1)
Chair: M. Kino
- 11:00 - 11:15
- 13:30 - 14:10
K. Murase (Penn State/Kyoto)
"Active galactic nuclei as multimessenger sources"
Session 2: Physics of Relativistic Jets
Chair: K. Toma
- 15:30 - 15:50
Session 3: MWL and Multi-Messenger Study on AGNs (2)
Chair: J. Park
Jan. 19 (Tue.)
Session 4: Accretion Flow and Jet from Kinetic-Plasma to MHD Scale
Chair: T. Kawashima
- 10:20 - 10:35
- 10:35 - 11:15
M. Hoshino (Tokyo)
"PIC simulations of particle acceleration and plasma heating in accretion flows"
- 11:55 - 13:35
Lunch (Photo Session)
Session 5: Polarimetric Study of AGNs
Chair: M. Machida
Session 6: Transient Events with VLBI
Chair: K. Kawaguchi
- 15:50 - 16:30
K. Hotokezaka (Tokyo)
"Radio counterparts of neutron star mergers and VLBI observations"
Jan. 20 (Wed.)
Session 7: Future Facilities for VLBI, MWL, Multi-Messenger Science
Chair: S. Trippe
- 9:40 - 10:20
H. Nagai (NAOJ)
"Recent progress on BH-related science with ALMA and future prospects for ngVLA"
- 10:20 - 10:35
Session 8: Highly Accreting Compact Objects
Chair: K. Hada
- 15:00 - 15:15
SOC: T. Kawashima (ICRR, Tokyo, chair), M. Kino (Kogakuin/NAOJ), K. Hada (NAOJ Mizusawa VLBI),
K. Toma (Tohoku), K. Kawaguchi (ICRR, Tokyo)
LOC: K. Kawaguchi (chair), T. Kinugawa, K. Asano (ICRR, Tokyo)