Publications (10)
The Noctua Suite of Simulations -- The Difficulty of Growing Massive Black Holes in Low-Mass Dwarf Galaxies
Jonathan Petersson, Michaela Hirschmann, Robin G. Tress +6
Aims. We study the individual and cumulative impact of stellar feedback processes on massive black hole (MBH) growth in a simulated low-mass dwarf galaxy. Methods. A suite of high-…
Mergers all the way down: stellar collisions and kinematics of a dense hierarchically forming massive star cluster in a dwarf starburst
Natalia Lahén, Thorsten Naab, Antti Rantala +1
Recent observations indicate that the progenitors of globular clusters (GCs) at high redshifts had high average stellar surface densities above $10^5\, \mathrm{M}_\odot\, \mathrm{p…
MAGICS II. Seed black holes stripped of their surrounding stars do not sink
Yihao Zhou, Diptajyoti Mukherjee, Nianyi Chen +7
MBH seed mergers are expected to be among the loudest sources of gravitational waves detected by the Laser Interferometer Space Antenna (LISA), providing a unique window into the b…
BIFROST: simulating compact subsystems in star clusters using a hierarchical fourth-order forward symplectic integrator code
Antti Rantala, Thorsten Naab, Francesco Paolo Rizzuto +3
We present BIFROST, an extended version of the GPU-accelerated hierarchical fourth-order forward symplectic integrator code FROST. BIFROST (BInaries in FROST) can efficiently evolv…
Fast simulations of cosmic large-scale structure with massive neutrinos
Christian Partmann, Christian Fidler, Cornelius Rampf +1
Accurate cosmological simulations that include the effect of non-linear matter clustering as well as of massive neutrinos are essential for measuring the neutrino mass scale from u…
The importance of nuclear star clusters for massive black hole growth and nuclear star formation in simulated low-mass galaxies
Christian Partmann, Thorsten Naab, Natalia Lahén +5
Observed low-mass galaxies with nuclear star clusters (NSCs) can host accreting massive black holes (MBH). We present simulations of dwarf galaxies ($M_{\mathrm{baryon}} \sim 0.6 -…
The formation, evolution and disruption of star clusters with improved gravitational dynamics in simulated dwarf galaxies
Natalia Lahén, Antti Rantala, Thorsten Naab +3
So far, even the highest resolution galaxy formation simulations with gravitational softening have failed to reproduce realistic life cycles of star clusters. We present the first…
A Minimal Model for Massive Neutrinos in Newtonian N-body Simulations
Pol Heuschling, Christian Partmann, Christian Fidler
We present a novel method for including the impact of massive neutrinos in cold dark matter N-body simulations. Our approach is compatible with widely employed Newtonian N-body cod…
The VIRUS-dE Survey II: Cuspy and round halos in dwarf ellipticals -- A result of early assembly?
Mathias Lipka, Jens Thomas, Roberto Saglia +3
We analyze the dark matter (DM) halos of a sample of dwarf Ellitpicals (dE) and discuss cosmological and evolutionary implications. Using orbit modeling we recover their density sl…
The difficult path to coalescence: massive black hole dynamics in merging low mass dark matter haloes and galaxies
Christian Partmann, Thorsten Naab, Antti Rantala +3
We present a high resolution numerical study of the sinking and merging of massive black holes (MBHs) with masses in the range of in multiple mino…