Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Rantala, Antti"'
Autor:
Rawlings, Alexander, Keitaanranta, Atte, Mattero, Max, Soininen, Sonja, Wright, Ruby J., Kallioinen, Noa, Liao, Shihong, Rantala, Antti, Johansson, Peter H., Naab, Thorsten, Irodotou, Dimitrios
We study stellar core growth in simulations of merging massive ($M_\star>10^{11}\,\mathrm{M}_\odot$) elliptical galaxies by a supermassive black hole (SMBH) displaced by gravitational wave induced recoil velocity. With controlled, dense sampling of t
Externí odkaz:
http://arxiv.org/abs/2410.13942
Autor:
Lahén, Natalia, Rantala, Antti, Naab, Thorsten, Partmann, Christian, Johansson, Peter H., Hislop, Jessica May
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 star-by-star galaxy models of star cluster formation to account for hy
Externí odkaz:
http://arxiv.org/abs/2410.01891
Primordial black holes (PBHs) could compose the dark matter content of the Universe. We present the first simulations of cosmological structure formation with PBH dark matter that consistently include collisional few-body effects, post-Newtonian orbi
Externí odkaz:
http://arxiv.org/abs/2410.01876
Autor:
Zhou, Yihao, Mukherjee, Diptajyoti, Chen, Nianyi, Di Matteo, Tiziana, Johansson, Peter H., Rantala, Antti, Partmann, Christian, Carlo, Ugo NiccolDi, Bird, Simeon, Ni, Yueying
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 birth and early growth of SMBH. We present the MAGICS-II simulation sui
Externí odkaz:
http://arxiv.org/abs/2409.19914
Autor:
Partmann, Christian, Naab, Thorsten, Lahén, Natalia, Rantala, Antti, Hirschmann, Michaela, Hislop, Jessica M., Petersson, Jonathan, Johansson, Peter H.
Observed low-mass galaxies with nuclear star clusters (NSCs) can host accreting massive black holes (MBH). We present simulations of dwarf galaxies ($M_{\mathrm{baryon}} \sim 0.6 - 2.4 \times 10^8 \rm \, M_\odot$) at solar mass resolution ($0.5\rm \,
Externí odkaz:
http://arxiv.org/abs/2409.18096
Very compact ($R_\mathrm{e}\lesssim1$ kpc) massive quiescent galaxies (red nuggets) are more abundant in the high-redshift Universe ($z\sim2$-$3$) than today. Their size evolution can be explained by collisionless dynamical processes in galaxy merger
Externí odkaz:
http://arxiv.org/abs/2407.18303
Black holes are believed to be crucial in regulating star formation in massive galaxies, which makes it essential to faithfully represent the physics of these objects in cosmological hydrodynamics simulations. Limited spatial and mass resolution and
Externí odkaz:
http://arxiv.org/abs/2405.08870
Autor:
Stegmann, Jakob, Vigna-Gómez, Alejandro, Rantala, Antti, Wagg, Tom, Zwick, Lorenz, Renzo, Mathieu, van Son, Lieke A. C., de Mink, Selma E., White, Simon D. M.
Publikováno v:
Jakob Stegmann et al 2024 ApJL 972 L19
A substantial fraction of stars can be found in wide binaries with projected separations between $\sim10^2$ and $10^5\,\rm AU$. In the standard lore of binary physics, these would evolve as effectively single stars that remotely orbit one another on
Externí odkaz:
http://arxiv.org/abs/2405.02912
Observations and high-resolution hydrodynamical simulations indicate that massive star clusters assemble hierarchically from sub-clusters with a universal power-law cluster mass function. We study the consequences of such assembly for the formation o
Externí odkaz:
http://arxiv.org/abs/2403.10602
Autor:
Partmann, Christian, Naab, Thorsten, Rantala, Antti, Genina, Anna, Mannerkoski, Matias, Johansson, Peter H.
We present a high resolution numerical study of the sinking and merging of massive black holes (MBHs) with masses in the range of $10^3 - 10^7 \, \mathrm{M}_\odot$ in multiple minor mergers of low mass dark matter halos without and with galaxies ($4\
Externí odkaz:
http://arxiv.org/abs/2310.08079