English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  KETJU – resolving small-scale supermassive black hole dynamics in gadget-4

Mannerkoski, M., Rawlings, A., Johansson, P. H., Naab, T., Rantala, A., Springel, V., et al. (2023). KETJU – resolving small-scale supermassive black hole dynamics in gadget-4. Monthly Notices of the Royal Astronomical Society, 524(3), 4062-4082. doi:10.1093/mnras/stad2139.

Item is

Files

show Files
hide Files
:
KETJU – resolving small-scale supermassive black hole dynamics in gadget-4.pdf (Any fulltext), 3MB
 
File Permalink:
-
Name:
KETJU – resolving small-scale supermassive black hole dynamics in gadget-4.pdf
Description:
-
OA-Status:
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Mannerkoski, Matias, Author
Rawlings, Alexander, Author
Johansson, Peter H., Author
Naab, Thorsten1, Author           
Rantala, Antti2, Author           
Springel, Volker1, Author           
Irodotou, Dimitrios, Author
Liao, Shihong, Author
Affiliations:
1Computational Structure Formation, MPI for Astrophysics, Max Planck Society, ou_2205642              
2Galaxy Formation, Cosmology, MPI for Astrophysics, Max Planck Society, ou_159878              

Content

show
hide
Free keywords: -
 Abstract: We present the new public version of the ketju supermassive black hole (SMBH) dynamics module, as implemented into gadget-4. ketju adds a small region around each SMBH where the dynamics of the SMBHs and stellar particles are integrated using an algorithmically regularized integrator instead of the leapfrog integrator with gravitational softening used by gadget-4. This enables modelling SMBHs as point particles even during close interactions with stellar particles or other SMBHs, effectively removing the spatial resolution limitation caused by gravitational softening. ketju also includes post-Newtonian (PN) corrections, which allows following the dynamics of SMBH binaries to sub-parsec scales and down to tens of Schwarzschild radii. Systems with multiple SMBHs are also supported, with the code also including the leading non-linear cross terms that appear in the PN equations for such systems. We present tests of the code showing that it correctly captures, at sufficient mass resolution, the sinking driven by dynamical friction and binary hardening driven by stellar scattering. We also present an example application demonstrating how the code can be applied to study the dynamics of SMBHs in mergers of multiple galaxies and the effect they have on the properties of the surrounding galaxy. We expect that the presented ketju SMBH dynamics module can also be straightforwardly incorporated into other codes similar to gadget-4, which would allow coupling small-scale SMBH dynamics to the rich variety of galactic physics models that exist in the literature.

Details

show
hide
Language(s): eng - English
 Dates: 2023-07-18
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stad2139
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 524 (3) Sequence Number: - Start / End Page: 4062 - 4082 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150