Publications (88)
Galaxy Rotation and Supermassive Black Hole Binary Evolution
Muhammad Awais Mirza, Afnan Tahir, Fazeel Mahmood Khan +4
Supermassive black hole (SMBH) binaries residing at the core of merging galaxies are recently found to be strongly affected by the rotation of their host galaxies. The highly eccen…
The effect of triaxiality on the dynamics of triple supermassive black holes in a cosmological context
Navonil Saha, Peter Berczik, Andreas Just +1
The hierarchical nature of galaxy formation in the CDM framework often leads to multiple supermassive black holes (SMBHs) in the galactic nuclei. The timescale over which galax…
Swift coalescence of supermassive black holes in cosmological mergers of massive galaxies
Fazeel M. Khan, Davide Fiacconi, Lucio Mayer +2
Supermassive black holes (SMBHs) are ubiquitous in galaxies with a sizable mass. It is expected that a pair of SMBHs originally in the nuclei of two merging galaxies would form a b…
Efficient Merger of Binary Supermassive Black Holes in Non-Axisymmetric Galaxies
Peter Berczik, David Merritt, Rainer Spurzem +1
Binary supermassive black holes form naturally in galaxy mergers, but their long-term evolution is uncertain. In spherical galaxies, N-body simulations show that binary evolution s…
Brownian Motion of Black Holes in Dense Nuclei
David Merritt, Peter Berczik, Frederik Laun
We evaluate the Brownian motion of a massive particle ("black hole") at the center of a galaxy using N-body simulations. Our galaxy models have power-law central density cusps like…
Long-Term Evolution of Massive Black Hole Binaries. II. Binary Evolution in Low-Density Galaxies
Peter Berczik, David Merritt, Rainer Spurzem
We use direct-summation N-body integrations to follow the evolution of binary black holes at the centers of galaxy models with large, constant-density cores. Particle numbers as la…
Intermediate Mass Black Hole Binary Evolution in Nuclear Star Clusters: the effect of the stellar mass black hole population
Fazeel Mahmood Khan, Peter Berczik, Margarita Sobolenko +4
In this study, we investigate the dynamics of Intermediate-Mass Black Hole (IMBH) binaries within Nuclear Star Clusters (NSCs) that contain a population of stellar-mass black holes…
Chemo -- Dynamical evolution of disk galaxies, smoothed particles hydrodynamics approach
Peter Berczik
A new Chemo -- Dynamical Smoothed Particle Hydrodynamic (CD -- SPH) code is presented. The disk galaxy is described as a multi -- fragmented gas and star system, embedded into the…
A scenario for the formation of dwarf galaxies with an anomally low dark-matter content
Peter Berczik, Sergei G. Kravchuk
The formation and evolution of a low mass galaxy in the gravitational field of a massive disk galaxy (like the Milky Way) has been studied. Numerical simulations of complex gas-dyn…
Chemo-Dynamical SPH code for evolution of star forming disk galaxies
Peter Berczik
A new Chemo-Dynamical Smoothed Particle Hydrodynamic (CD-SPH) code is presented. The disk galaxy is described as a multi-fragmented gas and star system, embedded in a cold dark mat…
Global survey of star clusters in the Milky Way VIII. Cluster formation and evolution
Jonathan H. Klos, Andreas Just, Evgeny V. Polyachenko +2
We consider tidal masses and ages of Milky Way open clusters, as well as a simple model of their distribution. Our aim is to investigate the space of model parameters and the corre…
SMBH in Galactic Nuclei with Tidal Disruption of Stars
Shiyan Zhong, Peter Berczik, Rainer Spurzem
Tidal Disruption of stars by super massive central black holes from dense star clusters is modeled by high-accuracy direct -body simulation. The time evolution of the stellar ti…
Primordial Binary Stars, Mass segregation and Fractality Effects on the Early Evolution of Young Open Clusters
Vahid Amiri, Francesco Flammini Dotti, Xiaoying Pang +4
We want to understand how the combined effect of initial substructure, primordial mass segregation, and primordial binaries affects the dynamical evolution of the cluster, and whic…
Dynamical evolution modeling of the Collinder 135 & UBC 7 binary star cluster
Marina Ishchenko, Peter Berczik, Nina Kharchenko
The purpose of the present work is a detailed investigation of the dynamical evolutionof Collinder 135 and UBC 7 star clusters. We present a set of dynamical numerical simulationsu…
Analyze of the star formation modeling algorithm in SPH code
Peter Berczik
The chemical and photometric evolution of star forming disk galaxies is investigated. Numerical simulations of the complex gasdynamical flows are based on our own coding of the Che…
BSE versus StarTrack: implementations of new wind, remnant-formation, and natal-kick schemes in NBODY7 and their astrophysical consequences
Sambaran Banerjee, Krzysztof Belczynski, Christopher L. Fryer +4
The masses of stellar-remnant black holes (BH), as a result of their formation via massive single- and binary-stellar evolution, is of high interest in this era of gravitational-wa…
Dynamical evolution of massless particles in star clusters with NBODY6++GPU-MASSLESS: I. Free-floating MLPs
Francesco Flammini Dotti, M. B. N. Kouwenhoven, Peter Berczik +2
Context. Low-mass bodies, such as comets, asteroids, planetesimals, and free-floating planets, are continuously injected into the intra-cluster environment after expulsion from the…
Milky Way globular clusters on cosmological timescales. II. Interaction with the Galactic centre
Maryna Ishchenko, Margaryta Sobolenko, Dana Kuvatova +2
Aims. We estimate the dynamical evolution of the Globular Clusters interaction with the Galactic centre that dynamically changed in the past. Methods. We simulated the orbits of 14…
Estimating Gamma-Ray Flux from Millisecond Pulsars Originating in Globular Clusters Near the Galactic Center
Dana Kuvatova, Taras Panamarev, Maryna Ishchenko +2
In this study, we investigate the contribution of millisecond pulsars (MSPs) to the gamma-ray excess observed in the Galactic Center by analyzing data from high-resolution direct N…
The Dragon-II simulations -- I. Evolution of single and binary compact objects in star clusters with up to 1 million stars
Manuel Arca Sedda, Albrecht W. H. Kamlah, Rainer Spurzem +7
We present the first results of the \textsc{Dragon-II} simulations, a suite of 19 -body simulations of star clusters with up to stars, with up to of them initially…
Dynamical Evolution and Merger Time-scales of LISA Massive Black Hole Binaries in Disk Galaxy Mergers
Fazeel M. Khan, Pedro R. Capelo, Lucio Mayer +1
The Laser Interferometer Space Antenna (LISA) will detect gravitational-wave (GW) signals from merging supermassive black holes (BHs) with masses below ~M. It is th…
Extreme kinematic misalignment in IllustrisTNG galaxies: the origin, structure and internal dynamics of galaxies with a large-scale counterrotation
Sergey Khoperskov, Igor Zinchenko, Branislav Avramov +9
Modern galaxy formation theory suggests that the misalignment between stellar and gaseous components usually results from an external gas accretion and/or interaction with other ga…
Boosted Tidal Disruption by Massive Black Hole Binaries During Galaxy Mergers FROM The View of N-Body Simulation
Shuo Li, F. K. Liu, Peter Berczik +1
Supermassive black hole binaries (SMBHBs) are productions of the hierarchical galaxy formation model. There are many close connections between central SMBH and its host galaxy beca…
The Dragon-II simulations -- III. Compact binary mergers in clusters with up to 1 million stars: mass, spin, eccentricity, merger rate and pair instability supernovae rate
Manuel Arca Sedda, Albrecht W. H. Kamlah, Rainer Spurzem +4
Compact binary mergers forming in star clusters may exhibit distinctive features that can be used to identify them among observed gravitational-wave (GW) sources. Such features lik…
Fast coalescence of massive black hole binaries from mergers of galactic nuclei: implications for low-frequency gravitational-wave astrophysics
Miguel Preto, Ingo Berentzen, Peter Berczik +1
We investigate a purely stellar dynamical solution to the Final Parsec Problem. Galactic nuclei resulting from major mergers are not spherical, but show some degree of triaxiality.…
Growth of Seed Black Holes in Galactic Nuclei
Rainer Spurzem, Francesco Rizzuto, Manuel Arca Sedda +5
The evolution of dense star clusters is followed by direct high-accuracy N-body simulation. The problem is to first order a gravitational N-body problem, but stars evolve due to as…
Direct n-body simulations of tidal disruption rate evolution in unequal-mass galaxy mergers
Shuo Li, Peter Berczik, Xian Chen +3
The hierarchical galaxy formation model predicts supermassive black hole binaries (SMBHBs) in galactic nuclei. Due to the gas poor environment and the limited spatial resolution in…
Dynamical evolution of massless particles in star clusters with NBODY6++GPU-MASSLESS: II. The long-term evolution of free-floating comets
Francesco Flammini Dotti, M. B. N. Kouwenhoven, Kai Wu +5
Context. Comets, asteroids, planetesimals, free-floating planets and brown dwarfs, are continuously injected into the intra-cluster environment after expulsion from their host plan…
On the Influence of Minor Mergers on the Radial Abundance Gradient in Disks of Milky Way-like Galaxies
Igor A. Zinchenko, Peter Berczik, Eva K. Grebel +2
We investigate the influence of stellar migration caused by minor mergers (mass ratio from 1:70 to 1:8) on the radial distribution of chemical abundances in the disks of Milky Way-…
Milky Way globular clusters on cosmological timescales. III. Interaction rates
Maryna Ishchenko, Margaryta Sobolenko, Peter Berczik +4
Aims. We carry out the self-consistent dynamic evolution of the orbital structure of Milky Way globular clusters. This allows us to estimate possible and probable close passages an…
Star Clusters in the Galactic tidal field, from birth to dissolution
Bekdaulet Shukirgaliyev, Genevieve Parmentier, Peter Berczik +1
We study the evolution of star clusters in the Galactic tidal field starting from their birth in molecular clumps. Our model clusters form according to the local-density-driven clu…
Collinder 135 and UBC 7: A Physical Pair of Open Clusters
Dana Kovaleva, Marina Ishchenko, Ekaterina Postnikova +7
Given the closeness of the two open clusters Cr 135 and UBC 7 on the sky, we investigate the possibility of the two clusters to be physically related. We aim to recover the present…
Formation of a nuclear star cluster through the inspiral of globular clusters: A case study of the dwarf elliptical galaxy UGC 7346
Ismael Khan, Fazeel Mahmood Khan, Andrea V. Macciò +2
Nuclear star clusters (NSCs) are dense stellar environments located in the center of most galaxies. NSCs are thought to form through two primary methods; through the inspiral of gl…
The Dragon-II simulations -- II. Formation mechanisms, mass, and spin of intermediate-mass black holes in star clusters with up to 1 million stars
Manuel Arca Sedda, Albrecht W. H. Kamlah, Rainer Spurzem +4
The processes that govern the formation of intermediate-mass black holes (IMBHs) in dense stellar clusters are still unclear. Here, we discuss the role of stellar mergers, star-BH…
The impact of Post-Newtonian effects on massive black hole binary evolution at separations
Branislav Avramov, Peter Berczik, Andreas Just
Aims: We study the impact of Post-Newtonian correction terms on the energetic interaction between a gravitational wave (GW)-emitting supermassive black hole (SMBH) binary system an…
The echo of the bar buckling: phase-space spirals in Gaia DR2
Sergey Khoperskov, Paola Di Matteo, Ortwin Gerhard +5
Using a single N-body simulation () we explore the formation, evolution and spatial variation of the phase-space spirals similar to those recently discovered by…
Impact of a star formation efficiency profile on the evolution of open clusters
Bekdaulet Shukirgaliyev, Genevieve Parmentier, Peter Berczik +1
We study the effect of the instantaneous gas expulsion on star clusters wherein the residual gas has a density profile shallower than that of the embedded cluster. This is expected…
Star-disc interaction in galactic nuclei: formation of a central stellar disc
Taras Panamarev, Bekdaulet Shukirgaliyev, Yohai Meiron +5
We perform high resolution direct -body simulations to study the effect of an accretion disc on stellar dynamics in an active galactic nucleus (AGN). We show that the interactio…
Formation and Hardening of Supermassive Black Hole Binaries in Minor Mergers of Disk Galaxies
Fazeel Mahmood Khan, Ingo Berentzen, Peter Berczik +4
We model for the first time the complete orbital evolution of a pair of Supermassive Black Holes (SMBHs) in a 1:10 galaxy merger of two disk dominated gas-rich galaxies, from the s…
Dissipative N - body code for galaxy evolution
Peter Berczik, Sergei Kravchuk
The evolving galaxy is considered as a system of baryonic fragments embedded into the static dark nonbaryonic (DH) and baryonic (BH) halo and subjected to gravitational and viscous…
Rapid formation of a very massive star >50000 and subsequently an IMBH from runaway collisions. Direct N-body and Monte Carlo simulations of dense star clusters
Marcelo C. Vergara, Abbas Askar, Albrecht W. H. Kamlah +15
Context. We present simulations of a massive young star cluster using \textsc{Nbody6++GPU} and \textsc{MOCCA}. The cluster is initially more compact than previously published model…
Evolution of star clusters with initial bulk rotation via N-body simulations
Abylay Bissekenov, Xiaoying Pang, Albrecht Kamlah +6
Young star clusters can inherit bulk rotation from the molecular clouds from which they have formed. This rotation can affect the long-term evolution of a star cluster and its cons…
Gravitational Wave Driven Mergers and Coalescence Time of Supermassive Black Holes
Fazeel Mahmood Khan, Peter Berczik, Andreas Just
The evolution of Supermassive Black Holes (SMBHs) initially embedded in the centres of merging galaxies realised with a stellar mass function (SMF) is studied from the onset of gal…
Star-by-star dynamical evolution of the physical pair of the Collinder 135 and UBC 7 open clusters
Maryna Ishchenko, Dana A. Kovaleva, Peter Berczik +8
In a previous paper using Gaia DR2 data, we demonstrated that the two closely situated open clusters Collinder 135 and UBC 7 might have formed together about 50 Myr ago. In this wo…
SPH code for dynamical and chemical evolution of disk galaxies
Peter Berczik
The problem of chemical and dynamical evolution of galaxies is one of the most attracting and complex problems of modern astrophysics. Within the framework of the given work the st…
Interaction of Recoiling Supermassive Black Holes with Stars in Galactic Nuclei
Shuo Li, F. K. Liu, Peter Berczik +2
Supermassive black hole binaries (SMBHBs) are the products of frequent galaxy mergers. The coalescence of the SMBHBs is a distinct source of gravitational wave (GW) radiation. The…
Intermediate Mass Black Hole Formation in compact Young Massive Star Clusters
Francesco Paolo Rizzuto, Thorsten Naab, Rainer Spurzem +6
Young dense massive star clusters are a promising environment for the formation of intermediate mass black holes (IMBHs) through collisions. We present a set of 80 simulations carr…
Merger of Massive Black Holes using N-Body Simulations with Post-Newtonian Corrections
Miguel Preto, Ingo Berentzen, Peter Berczik +2
We present preliminary results from self-consistent, high resolution direct {\it N}-body simulations of massive black hole binaries in mergers of galactic nuclei. The dynamics of t…
Dynamics of supermassive black hole triples in the ROMULUS25 cosmological simulation
Hauke Koehn, Andreas Just, Peter Berczik +1
For a pair of supermassive black holes (SMBHs) in the remnant of a dual galaxy merger, well-known models exist to describe their dynamical evolution until the final coalescence acc…
The DRAGON simulations: globular cluster evolution with a million stars
Long Wang, Rainer Spurzem, Sverre Aarseth +6
Introducing the DRAGON simulation project, we present direct -body simulations of four massive globular clusters (GCs) with stars and 5 primordial binaries at a high…
Globular clusters of the Gaia Enceladus/Sausage -- I. Orbital and dynamical evolution on cosmological timescales
Mykyta Bilodid, Maryna Ishchenko, Peter Berczik
We investigated Gaia-Enceladus/Sausage globular cluster samples and studied their orbital and dynamical evolution over cosmological timescales in external time-variable potential.…
Mergers of Unequal Mass Galaxies: Supermassive Black Hole Binary Evolution and Structure of Merger Remnants
Fazeel Mahmood Khan, Miguel Preto, Peter Berczik +3
Galaxy centers are residing places for Super Massive Black Holes (SMBHs). Galaxy mergers bring SMBHs close together to form gravitationally bound binary systems which, if able to c…
Properties of loss cone stars in a cosmological galaxy merger remnant
Branislav Avramov, Peter Berczik, Yohai Meiron +2
Aims: We investigate the orbital and phase space properties of loss cone stars that interact strongly with a hard, high-redshift binary supermassive black hole (SMBH) system formed…
Global m=1 slow mode in near-Keplerian self-gravitating torus: applications to stellar nuclear disks and AGN molecular tori
Elena Bannikova, Volodymyr Akhmetov, Peter Berczik +3
Global m=1 asymmetries are observed in many self-gravitating astrophysical systems and are often interpreted as large-scale slow modes in near-Keplerian potentials. Prominent examp…
On the bar formation mechanism in galaxies with cuspy bulges
Evgeny Polyachenko, Peter Berczik, Andreas Just
We show by numerical simulations that a purely stellar dynamical model composed of an exponential disc, a cuspy bulge, and an NFW halo with parameters relevant to the Milky Way Gal…
Direct N-body simulation of the Galactic centre
Taras Panamarev, Andreas Just, Rainer Spurzem +3
We study the dynamics and evolution of the Milky Way nuclear star cluster performing a high resolution direct one-million-body simulation. Focusing on the interactions between such…
Binary Black Hole Merger in Galactic Nuclei: Post-Newtonian Simulations
Ingo Berentzen, Miguel Preto, Peter Berczik +2
This paper studies the formation and evolution of binary supermassive black holes (SMBHs) in rotating galactic nuclei, focusing on the role of stellar dynamics. We present the firs…
Classification of Tidal Disruption Events Based on Stellar Orbital Properties
Kimitake Hayasaki, Shiyan Zhong, Shuo Li +2
We study the rates of tidal disruption of stars by intermediate-mass to supermassive black holes on bound to unbound orbits by using high-accuracy direct N-body experiments. The ap…
The effect of triaxial galaxy shapes on the dynamics of triple supermassive black holes in a cosmological context
Navonil Saha, Margarita Sobolenko, Peter Berczik +2
The hierarchical nature of galaxy formation in the Lambda cold dark matter (CDM) cosmological framework model often leads to the presence of multiple supermassive black holes (…
Chemo - Photometric evolution of star forming disk galaxy
Peter Berczik
The chemical and photometric evolution of star forming disk galaxies is investigated. Numerical simulations of the complex gasdynamical flows are based on our own coding of the Che…
NBODY6++GPU: Ready for the gravitational million-body problem
Long Wang, Rainer Spurzem, Sverre Aarseth +4
Accurate direct -body simulations help to obtain detailed information about the dynamical evolution of star clusters. They also enable comparisons with analytical models and Fok…
Formation and disruption of wide binaries in star clusters revealed by N-body simulations
Abylay Bissekenov, Xiaoying Pang, Rainer Spurzem +3
Wide (soft) binaries are expected to be rapidly disrupted in dense stellar environments, yet they are observed in both the Galactic field and open clusters (OCs). In this paper, we…
Tracing the Evolution of SMBHs and Stellar Objects in Galaxy Mergers: An Multi-mass Direct N-body Model
Shuo Li, Shiyan Zhong, Peter Berczik +3
By using direct N-body numerical simulations, we model the dynamical co-evolution of two supermassive black holes (SMBHs) and the surrounding stars in merging galaxies. In order to…
Statistical Analysis of the Probability of Interaction of Globular Clusters with Each Other and with the Galactic Center on the Cosmological Time Scale According to Gaia DR2 Data
Maryna Ishchenko, Margaryta Sobolenko, Peter Berczik +1
This study is aimed at investigating the dynamic evolution of the orbits of stellar globular clusters (GCs). To integrate the orbits backward in time, the authors use models of the…
Evolution of the disky second generation of stars in globular clusters on cosmological timescale
Peter Berczik, Taras Panamarev, Maryna Ishchenko +1
Context. Many Milky Way globular clusters (GCs) host multiple stellar populations, challenging the traditional view of GCs as single-population systems. It has been suggested that…
Milky Way globular clusters on cosmological timescales. IV. Guests in the outer Solar System
Maryna Ishchenko, Peter Berczik, Margarita Sobolenko
The present epoch of the Gaia success gives us a possibility to predict the dynamical evolution of our Solar System in the global Galactic framework with high precision. We statist…
Eccentricity evolution of massive black hole binaries from formation to coalescence
Alessia Gualandris, Fazeel Mahmood Khan, Elisa Bortolas +4
Coalescing supermassive black hole binaries (BHBs) are expected to be the loudest sources of gravitational waves (GWs) in the Universe. Detection rates for ground or space-based de…
Enhanced accretion rates of stars on Super-massive Black Holes by star-disk interactions in galactic nuclei
Andreas Just, Denis Yurin, Maxim Makukov +4
We investigate the dynamical interaction of a central star cluster surrounding a super-massive black hole and a central accretion disk. The dissipative force acting on stars in the…
Star-disc interaction in galactic nuclei: orbits and rates of accreted stars
Gareth F. Kennedy, Yohai Meiron, Bekdaulet Shukirgaliyev +4
We examine the effect of an accretion disc on the orbits of stars in the central star cluster surrounding a central massive black hole by performing a suite of 39 high-accuracy dir…
Mass loss from massive globular clusters in tidal fields
Yohai Meiron, Jeremy J. Webb, Jongsuk Hong +3
Massive globular clusters lose stars via internal and external processes. Internal processes include mainly two-body relaxation, while external processes include interactions with…
Cosmological Insights into the Early Accretion of \textit{r}-Process-Enhanced stars. I. A Comprehensive Chemo-dynamical Analysis of LAMOST J1109+0754
Mohammad K. Mardini, Vinicius M. Placco, Yohai Meiron +10
This study presents a comprehensive chemo-dynamical analysis of LAMOST J1109+0754, a bright (V = 12.8), extremely metal-poor (\abund{Fe}{H} = ) star, with a strong \textit{r…
Galaxy as dissipative N -- body system. Chemical aspect
Peter Berczik, Sergei G. Kravchuk
The evolving galaxy is considered as a system of baryonic fragments embedded into the static dark nonbaryonic (DH) and baryonic (BH) halo and subjected to gravitational and viscous…
Revisit the rate of tidal disruption events: the role of the partial tidal disruption event
Shiyan Zhong, Shuo Li, Peter Berczik +1
Tidal disruption of stars in dense nuclear star clusters containing supermassive central black holes (SMBH) is modeled by high-accuracy direct N-body simulation. Stars getting too…
Performance analysis of parallel gravitational -body codes on large GPU cluster
Siyi Huang, Rainer Spurzem, Peter Berczik
We compare the performance of two very different parallel gravitational -body codes for astrophysical simulations on large GPU clusters, both pioneer in their own fields as well…
The Link Between Ejected Stars, Hardening and Eccentricity Growth of Super Massive Black Holes in Galactic Nuclei
Long Wang, Peter Berczik, Rainer Spurzem +1
The hierarchical galaxy formation picture suggests that super massive black holes (MBHs) observed in galactic nuclei today have grown from coalescence of massive black hole binarie…
Bimodality of [α/Fe]-[Fe/H] distributions is a natural outcome of dissipative collapse and disc growth in Milky Way-type galaxies
Sergey Khoperskov, Misha Haywood, Owain Snaith +5
We present a set of self-consistent chemo-dynamical simulations of MW-type galaxies formation to study the origin of the bimodality of -elements in stellar populations. We expl…
Performance Analysis of Direct N-Body Algorithms on Special-Purpose Supercomputers
Stefan Harfst, Alessia Gualandris, David Merritt +3
Direct-summation N-body algorithms compute the gravitational interaction between stars in an exact way and have a computational complexity of O(N^2). Performance can be greatly enh…
Supermassive black holes coalescence mediated by massive perturbers: implications for gravitational waves emission and nuclear cluster formation
Manuel Arca Sedda, Peter Berczik, Roberto Capuzzo-Dolcetta +3
A large fraction of galactic nuclei is expected to host supermassive black hole binaries (BHB), likely formed during the early phase of galaxies assembly and merging. In this paper…
Modeling the star formation in galaxies using the Chemo - dynamical SPH code
Peter Berczik
A new Chemo - Dynamical Smoothed Particle Hydrodynamic (CD - SPH) code is presented. The disk galaxy is described as a multi - fragmented gas and star system, embedded in a cold da…
The long-term evolution of star clusters formed with a centrally-peaked star-formation-efficiency profile
Bekdaulet Shukirgaliyev, Genevieve Parmentier, Andreas Just +1
We have studied the long-term evolution of star clusters of the solar neighborhood, starting from their birth in gaseous clumps until their complete dissolution in the Galactic tid…
Ultramassive Black Hole Coalescence
Fazeel Khan, Kelly Holley-Bockelmann, Peter Berczik
Although supermassive black holes (SMBHs) correlate well with their host galaxies, there is an emerging view that outliers exist. Henize 2-10, NGC 4889, and NGC1277 are examples of…
The potential for long-lived intermediate mass black hole binaries in the lowest density dwarf galaxies
Fazeel Mahmood Khan, Fiza Javed, Kelly Holley-Bockelmann +3
Intermediate Mass Black Hole (IMBH) mergers with masses are expected to produce gravitational waves (GWs) detectable by the Laser Interferometer Space Ant…
Supermassive Black Holes in Galactic Nuclei with Tidal Disruption of Stars: Paper II - Axisymmetric Nuclei
Shiyan Zhong, Peter Berczik, Rainer Spurzem
Tidal Disruption of stars by supermassive central black holes from dense rotating star clusters is modelled by high-accuracy direct N-body simulation. As in a previous paper on sph…
The dynamical origin of multiple populations in intermediate-age clusters in the Magellanic Clouds
Jongsuk Hong, Richard de Grijs, Abbas Askar +7
Numerical simulations were carried out to study the origin of multiple stellar populations in the intermediate-age clusters NGC 411 and NGC 1806 in the Magellanic Clouds. We perfor…
Merging of unequal mass binary black holes in non-axisymmetric galactic nuclei
Peter Berczik, Manuel Arca Sedda, Margaryta Sobolenko +3
In this work, we study the stellar-dynamical hardening of unequal mass supermassive black hole (SMBH) binaries in the central regions of merging galactic nuclei. We present a compr…
Merging timescale for supermassive black hole binary in interacting galaxy NGC 6240
Margarita Sobolenko, Peter Berczik, Rainer Spurzem
One of the main possible way of creating the supermassive black hole (SMBH) is a so call hierarchical merging scenario. Central SMBHs at the final phase of interacting and coalesci…
Exploring the origin of stars on bound and unbound orbits causing tidal disruption events
Shiyan Zhong, Kimitake Hayasaki, Shuo Li +2
Tidal disruption events (TDEs) provide a clue to the properties of a central supermassive black hole (SMBH) and an accretion disk around it, and to the stellar density and velocity…
Evolution of growing black holes in axisymmetric galaxy cores
Jose Fiestas, Oliver Porth, Peter Berczik +1
NBody realizations of axisymmetric collisional galaxy cores (e.g. M32, M33, NGC205, Milky Way) with embedded growing black holes are presented. Stars which approach the disruption…