Black Hole Astrophysics with VLBI:
Multi-Wavelength and Multi-Messenger Era
Institute for Cosmic Ray Research,
the University of Tokyo (Kashiwa/On-line)
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
Program
Jan. 18 (Mon.)
- 9:10 - 9:20
Opening address
Session 1: MWL and Multi-Messenger Study on AGNs (1)
Chair: M. Kino
- 9:20 - 10:00
K. Hada (NAOJ)
"Multiwavelength observation of M87"
- 10:00 - 10:20
T. Kawashima (ICRR)
"A general-relativistic, multi-wavelength study of accretion flows and relativistic jets"
- 10:20 - 10:40
H. Ro (Yonsei/KASI)
"Spectral properties of M87 jet revealed by multi-frequency VLBI observations"
- 10:40 - 11:00
N. Isobe (ISAS/JAXA)
"Particle acceleration and magnetic-field amplification by magnetic turbulence in the west hot spot of Pictor A revealed with mid-to-far infrared observations"
- 11:00 - 11:15
Coffee break
- 11:15 - 12:15
Poster flash + Poster session 1
- 12:15 - 13:30
Lunch
- 13:30 - 14:10
K. Murase (Penn State/Kyoto)
"Active galactic nuclei as multimessenger sources"
Session 2: Physics of Relativistic Jets
Chair: K. Toma
- 14:10 - 14:50
H-Y. Pu (NTNU)
"Linking VLBI observation with GRMHD theory at all scales: Phenomenological models of black hole jets/accretion"
- 14:50 - 15:10
T. Ogihara (Tohoku)
"Matter density distribution of GRMHD jets driven by black holes"
- 15:10- 15:30
S. Noda (Yangzhou)
"Blandford-Znajek process and propagation of Alfvén waves"
- 15:30 - 15:50
Coffee break
- 15:50 - 16:30
A. Levinson (Tel Aviv)
"Plasma injection, sparks and HE emission in BH magnetospheres"
- 16:30 - 16:50
S. Kisaka (Hiroshima)
"Energy conversion efficiency in magnetospheric gaps around Kerr black holes"
Session 3: MWL and Multi-Messenger Study on AGNs (2)
Chair: J. Park
- 16:50 - 17:30
D. Paneque (MPP)
"The challenge of understanding AGNs through extensive multiwavelength observations"
- 17:30 - 17:50
S. Inoue (Bunkyo/RIKEN)
"High-energy neutrino and gamma-ray emission from AGN-driven winds"
Jan. 19 (Tue.)
Session 4: Accretion Flow and Jet from Kinetic-Plasma to MHD Scale
Chair: T. Kawashima
- 9:00 - 9:40
I. Cho (KASI)
"EAVN observations toward Sgr A*"
- 9:40 - 10:20
M. Machida (NAOJ)
"3D MHD simulation to reveal angular momentum transport in an accretion disk"
- 10:20 - 10:35
Coffee break
- 10:35 - 11:15
M. Hoshino (Tokyo)
"PIC simulations of particle acceleration and plasma heating in accretion flows"
- 11:15 - 11:35
S. S. Kimura (Tohoku)
"Particle acceleration simulations in hot accretion flows"
- 11:35 - 11:55
T. Ohmura (Kyushu)
"Two-temperature MHD simulations of extragalactic Jets"
- 11:55 - 13:35
Lunch (Photo Session)
Session 5: Polarimetric Study of AGNs
Chair: M. Machida
- 13:35 - 14:15
J. Park (ASIAA)
"Prospect of polarization observations of M87 with the EHT and jet collimation and acceleration in the giant radio galaxy NGC 315"
- 14:15 - 14:55
S. Trippe (SNU)
"Jets, shocks, and magnetic fields: AGN polarization with KVN"
- 14:55 - 15:15
Y. Tsunetoe (Kyoto)
"Polarization images around the supermassive black holes: Imprints of the magnetic field structure"
- 15:15 - 15:50
Coffee break + poster session 2
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"
- 16:30 - 16:50
K. Takahashi (Kyoto)
"Diverse jet structures consistent with the off-axis afterglow of GRB 170817A"
- 16:50 - 17:30
M. Giroletti (INAF)
"VLBI observations of transient events in a multi-messenger context"
- 17:30 - 18:00
Poster session 3
Jan. 20 (Wed.)
Session 7: Future Facilities for VLBI, MWL, Multi-Messenger Science
Chair: S. Trippe
- 9:00 - 9:40
K. Asada (ASIAA)
"Status of GLT, East Asia VLBI Network-hi (EAVN-hi) observations"
- 9:40 - 10:20
H. Nagai (NAOJ)
"Recent progress on BH-related science with ALMA and future prospects for ngVLA"
- 10:20 - 10:35
Coffee break
- 10:35 - 11:15
H. Noda (Osaka)
"X-ray Studies of Supermassive Black Holes and Jetted AGNs with XRISM"
- 11:15 - 11:55
M. Teshima (ICRR/MPP)
"Black hole astrophysics with CTA LST"
- 11:55 - 13:00
Lunch
Session 8: Highly Accreting Compact Objects
Chair: K. Hada
- 13:00 - 13:40
H. R. Takahashi (Komazawa)
"Relativistic radiation magnetohydrodynamic simulations of accretion disks"
- 13:40 - 14:00
N. Kawanaka (Kyoto)
"Origin of optically thick and low temperature coronae in super-Eddington accretion flows"
- 14:00 - 14:20
Y. Asahina (Tsukuba)
"GRRMHD simulations of black hole accretion flows solving Boltzmann equation"
- 14:20 - 14:40
T. Igarashi (Chiba)
"Radiation magnetohydrodynamic simulations of black hole accretion flows during hard-to-soft state transitions"
- 14:40 - 15:00
M. Nomura (KOSEN, Kure)
"Radiation hydrodynamic simulations of line-driven disk winds: Metallicity dependence and SMBH growth"
- 15:00 - 15:15
Closing remarks
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)
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.
Program
Opening address
Chair: M. Kino
K. Hada (NAOJ)
"Multiwavelength observation of M87"
T. Kawashima (ICRR)
"A general-relativistic, multi-wavelength study of accretion flows and relativistic jets"
H. Ro (Yonsei/KASI)
"Spectral properties of M87 jet revealed by multi-frequency VLBI observations"
N. Isobe (ISAS/JAXA)
"Particle acceleration and magnetic-field amplification by magnetic turbulence in the west hot spot of Pictor A revealed with mid-to-far infrared observations"
Coffee break
Poster flash + Poster session 1
Lunch
K. Murase (Penn State/Kyoto)
"Active galactic nuclei as multimessenger sources"
Chair: K. Toma
H-Y. Pu (NTNU)
"Linking VLBI observation with GRMHD theory at all scales: Phenomenological models of black hole jets/accretion"
T. Ogihara (Tohoku)
"Matter density distribution of GRMHD jets driven by black holes"
S. Noda (Yangzhou)
"Blandford-Znajek process and propagation of Alfvén waves"
Coffee break
A. Levinson (Tel Aviv)
"Plasma injection, sparks and HE emission in BH magnetospheres"
S. Kisaka (Hiroshima)
"Energy conversion efficiency in magnetospheric gaps around Kerr black holes"
Chair: J. Park
D. Paneque (MPP)
"The challenge of understanding AGNs through extensive multiwavelength observations"
S. Inoue (Bunkyo/RIKEN)
"High-energy neutrino and gamma-ray emission from AGN-driven winds"
Chair: T. Kawashima
I. Cho (KASI)
"EAVN observations toward Sgr A*"
M. Machida (NAOJ)
"3D MHD simulation to reveal angular momentum transport in an accretion disk"
Coffee break
M. Hoshino (Tokyo)
"PIC simulations of particle acceleration and plasma heating in accretion flows"
S. S. Kimura (Tohoku)
"Particle acceleration simulations in hot accretion flows"
T. Ohmura (Kyushu)
"Two-temperature MHD simulations of extragalactic Jets"
Lunch (Photo Session)
Chair: M. Machida
J. Park (ASIAA)
"Prospect of polarization observations of M87 with the EHT and jet collimation and acceleration in the giant radio galaxy NGC 315"
S. Trippe (SNU)
"Jets, shocks, and magnetic fields: AGN polarization with KVN"
Y. Tsunetoe (Kyoto)
"Polarization images around the supermassive black holes: Imprints of the magnetic field structure"
Coffee break + poster session 2
Chair: K. Kawaguchi
K. Hotokezaka (Tokyo)
"Radio counterparts of neutron star mergers and VLBI observations"
K. Takahashi (Kyoto)
"Diverse jet structures consistent with the off-axis afterglow of GRB 170817A"
M. Giroletti (INAF)
"VLBI observations of transient events in a multi-messenger context"
Poster session 3
Chair: S. Trippe
K. Asada (ASIAA)
"Status of GLT, East Asia VLBI Network-hi (EAVN-hi) observations"
H. Nagai (NAOJ)
"Recent progress on BH-related science with ALMA and future prospects for ngVLA"
Coffee break
H. Noda (Osaka)
"X-ray Studies of Supermassive Black Holes and Jetted AGNs with XRISM"
M. Teshima (ICRR/MPP)
"Black hole astrophysics with CTA LST"
Lunch
Chair: K. Hada
H. R. Takahashi (Komazawa)
"Relativistic radiation magnetohydrodynamic simulations of accretion disks"
N. Kawanaka (Kyoto)
"Origin of optically thick and low temperature coronae in super-Eddington accretion flows"
Y. Asahina (Tsukuba)
"GRRMHD simulations of black hole accretion flows solving Boltzmann equation"
T. Igarashi (Chiba)
"Radiation magnetohydrodynamic simulations of black hole accretion flows during hard-to-soft state transitions"
M. Nomura (KOSEN, Kure)
"Radiation hydrodynamic simulations of line-driven disk winds: Metallicity dependence and SMBH growth"
Closing remarks
K. Toma (Tohoku), K. Kawaguchi (ICRR, Tokyo)