KETJU: Post-Newtonian-Accurate Supermassive Black Hole Dynamics in GADGET-3

Antti Rantala; Pauli Pihajoki; Peter H. Johansson

doi:10.1017/S1743921316013004

KETJU: Post-Newtonian-Accurate Supermassive Black Hole Dynamics in GADGET-3

Antti Rantala, Pauli Pihajoki, Peter H. Johansson

Department of Physics

Research output: Contribution to journal › Conference article › Scientific

Abstract

We present KETJU, a new regularized tree code based on algorithmic chain regularization and implemented into Gadget-3. This new code is able to follow simultaneously galactic-scale dynamical and astrophysical processes and the small-scale supermassive black hole binary dynamics. We present here the general idea of this new code and show a test simulation of black hole binary dynamics in a galaxy merger of two massive elliptical galaxies. The separation of the black holes at the time of the merger is several orders of magnitude smaller in KETJU than when compared to ordinary Gadget-3 simulations. The merger timescale is also longer by 100 − 200 Myr.

Original language	English
Journal	Proceedings of the International Astronomical Union
Volume	12
Issue number	S324
Pages (from-to)	342-346
Number of pages	5
ISSN	1743-9213
DOIs	https://doi.org/10.1017/S1743921316013004
Publication status	Published - 1 May 2017
MoE publication type	B3 Article in conference proceedings
Event	IAU Symposium: New Frontiers in Black Hole Astrophysics - Cankarjev dom, Ljubljana, Slovenia Duration: 12 Sept 2016 → 16 Sept 2016 Conference number: 324

Fields of Science

115 Astronomy, Space science

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10.1017/S1743921316013004

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title = "KETJU: Post-Newtonian-Accurate Supermassive Black Hole Dynamics in GADGET-3",

abstract = "We present KETJU, a new regularized tree code based on algorithmic chain regularization and implemented into Gadget-3. This new code is able to follow simultaneously galactic-scale dynamical and astrophysical processes and the small-scale supermassive black hole binary dynamics. We present here the general idea of this new code and show a test simulation of black hole binary dynamics in a galaxy merger of two massive elliptical galaxies. The separation of the black holes at the time of the merger is several orders of magnitude smaller in KETJU than when compared to ordinary Gadget-3 simulations. The merger timescale is also longer by 100 − 200 Myr.",

keywords = "115 Astronomy, Space science",

author = "Antti Rantala and Pauli Pihajoki and Johansson, {Peter H.}",

year = "2017",

month = may,

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doi = "10.1017/S1743921316013004",

language = "English",

volume = "12",

pages = "342--346",

journal = "Proceedings of the International Astronomical Union",

issn = "1743-9213",

publisher = "Cambridge University Press",

number = "S324",

note = "IAU Symposium : New Frontiers in Black Hole Astrophysics ; Conference date: 12-09-2016 Through 16-09-2016",

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TY - JOUR

T1 - KETJU

T2 - IAU Symposium

AU - Rantala, Antti

AU - Pihajoki, Pauli

AU - Johansson, Peter H.

N1 - Conference code: 324

PY - 2017/5/1

Y1 - 2017/5/1

N2 - We present KETJU, a new regularized tree code based on algorithmic chain regularization and implemented into Gadget-3. This new code is able to follow simultaneously galactic-scale dynamical and astrophysical processes and the small-scale supermassive black hole binary dynamics. We present here the general idea of this new code and show a test simulation of black hole binary dynamics in a galaxy merger of two massive elliptical galaxies. The separation of the black holes at the time of the merger is several orders of magnitude smaller in KETJU than when compared to ordinary Gadget-3 simulations. The merger timescale is also longer by 100 − 200 Myr.

AB - We present KETJU, a new regularized tree code based on algorithmic chain regularization and implemented into Gadget-3. This new code is able to follow simultaneously galactic-scale dynamical and astrophysical processes and the small-scale supermassive black hole binary dynamics. We present here the general idea of this new code and show a test simulation of black hole binary dynamics in a galaxy merger of two massive elliptical galaxies. The separation of the black holes at the time of the merger is several orders of magnitude smaller in KETJU than when compared to ordinary Gadget-3 simulations. The merger timescale is also longer by 100 − 200 Myr.

KW - 115 Astronomy, Space science

U2 - 10.1017/S1743921316013004

DO - 10.1017/S1743921316013004

M3 - Conference article

SN - 1743-9213

VL - 12

SP - 342

EP - 346

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

IS - S324

Y2 - 12 September 2016 through 16 September 2016

ER -

KETJU: Post-Newtonian-Accurate Supermassive Black Hole Dynamics in GADGET-3

Abstract

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