Volkswagen Trilateral Project 3rd Meeting
Dynamical Mechanisms of Accretion in Galactic Nuclei
Joint Meeting with China-Kazakhstan collaboration
via zoom, Sep. 6-8, 2021 (all times in CEST = UTC + 2)
(zoom room communicated by email)

Organizers: Rainer Spurzem (ARI/ZAH,NAOC), Andreas Just (ARI/ZAH), Peter Berczik (MAO), Evgeni Polyachenko (INASAN), Chingis Omarov (FAA), Bekdaulet Shukirgaliyev (NU), Li Shuo (NAOC), Thijs M.B.N. Kouwenhoven (XJTLU)

Mode of Talks: 25 minutes, 5 minutes discussion.

Sep. 6: 13:00: Welcome, project and personal introduction:

Rainer Spurzem, organizers, all;

with: Remembering Emmanuil Vilkoviski† (by R. Spurzem)

Sep. 6: 13:30 - 16:30 (Monday afternoon, Chair: Rainer Spurzem)

Session 1: Multiple Supermassive Black Holes (SMBH), Mergers

13:30: Peter Berczik, Main Astronomical Observatory, Kiev, Ukraine:
Double & Triple SMBH evolution in galaxy centers. New hybrid code approaches and performance tests. 

14:00: Shuo Li, NAOC Beijing, China:
Tracing the Evolution of SMBH and Stellar Objects in Galaxy Mergers

14:30: Marina Ishchenko, Main Astronomical Observatory, Kiev, Ukraine: 
Life circle of Triple Supermassive Black Hole in NGC 6240

15:00 -15:30 Break

15:30: Branislav Avramov:
Properties of stars scattered by an SMBH binary in the late evolutionary phase including PN corrections 

16:00: Andreas Just:
On the formation and evolution of triple SMBHs in the IllustrisTNG cosmology 

 After 16:30: open free discussion, if requested.

Sep. 7: 09:30 – 12:00 (Tuesday morning, Chair: Andreas Just)

Session 2: Stability, Star Cluster Dissolution

09:30: Evgenii Polyachenko, INASAN, Moscow, Russia:
On damping in stellar medium

10:00: Bekdaulet Shukirgaliyev, Nazarbaev Univ., Nursultan City, Kazakhstan:
Ongoing project on star cluster dissolution
10:30: Olga Borodina, Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia and Moscow Institute of Physics and Technology, Dolgoprudny, Russia: 
On the density distribution of bound clusters after residual star-forming gas expulsion: Zhao profiles

11:00 – 12:00 : Internal Planning Meeting Volkswagen Trilateral Project

(Not public)

Sep. 7: 12:00 – 13:00 Lunch Break

Sep. 7: 13:00 – 17:00 (Tuesday Afternoon, Chair: Peter Berczik)

Session 3: Tidal Disruption Events, nuclear star clusters, galactic nuclei

13:00: Rainer Spurzem, ARI/ZAH, Univ. Heidelberg, Germany:
Modelling of Star Accretion on Central Black Holes in Star Clusters

13:30: Shiyan Zhong, Yunnan Observatory, CAS, Kunming, China:
Revisit the rate of tidal disruption event: the role of the partial tidal disruption event

14:00 Dominik Schleicher, Departamento de Astronomía, Universidad de Concepción, Chile: 
Accretion and collisions in nuclear star clusters
14:30: Taras Panamarev:
Stellar disks in Galactic nuclei 

15:00 – 15:30: Break

Session 4: Astrophysics in Kazakhstan, AGN discs, wind, and jet

15:30: Chingis Omarov/Maxim Makukov/Denis Yurin, Fesenkov Astrophysical Observatory, Almaty, Kazakhstan: 
(1) Elliptical galaxies: Structure, dynamics and sources for gravitational waves
(2) Development of the national Virtual Observatory based on robotic telescopes, Big Data technologies and high-performance computing
(3) Development of the national system for Space Situational Awareness (SSA): monitoring of near-earth and deep space and space weather.
 

16:00: Bidisha Bandyopadhyay, Departamento de Astronomía, Universidad de Concepción, Chile: 
General relativistic radiation transport: Implications for VLBI/EHTobservations of AGN discs, winds and jets.

Sep. 8: 09:30 – 11:00 (Wednesday morning, Chair: Evgenii Polyachenko)

Session 5: Stellar and Intermediate Mass Black Holes, Gravitational Waves

09:30: Sambaran Banerjee, Argelander Inst., Univ. Bonn, Germany:
Merger rate density of stellar-mass binary black holes from young massive clusters, open clusters, and isolated binaries

10:00: Manuel Arca Sedda, ARI/ZAH, Univ. Heidelberg, Germany:
Breaching the limit: merging stellar and intermediate-mass black holes in young massive clusters

10:30: Margarita Sobolenko, Main Astronomical Observatory, Kiev, Ukraine:
Spinning binary black hole mergers in galactic GC's and gravitational wave signals. 

11:00: Farewell