Image of simulated galaxies with a zoomed view of an SMBH binary

KETJU

The KETJU project funded by the European Research Council (ERC) and the Academy of Finland (AoF) studies the dynamics and impact of supermassive black holes using numerical simulations. The code making these simulations possible is publicly available.

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Other research topics of our group members include the formation and evolution of the Local Group of galaxies, the formation and evolution of stellar clusters, the formation of the first supermassive black holes and the formation and evolution of galaxies.

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Latest News

Open position: Research associate in Computational Astrophysics

Applications are now open for a position as Postdoctoral Researcher - apply by December 15!

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Published Article: Reviving stochasticity: uncertainty in SMBH binary eccentricity is unavoidable

Our article explores the relationship between the deflection angle (or equivalently, the impact parameter) between two supermassive black holes in an isolated galaxy merger setting and the resulting hard eccentricity of the black hole binary. We find that the hard binary eccentricity is a non-linear but deterministic function of the impact parameter. As a result, stochasticity in the impact parameter due to Brownian motion of the black holes is realised as a stochastic binary eccentricity, and is most likely present in the observable Universe.

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Open position: Postdoctoral Researcher in Computational Astrophysics

Applications are now open for a position as Postdoctoral Researcher - apply by October 6!

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Contact

For any enquiries, please contact Prof. Peter Johansson