The coalescence of two spinning supermassive black holes (SMBHs) results in the merged SMBH being kicked out from the centre of the galaxy surrounded by a cl...
We organised a workshop, which was held on July 28-30, 2025 at the City Centre Campus of the University of Helsinki. The workshop had 36 participants, and ov...
Our recent article challenges the status quo of an unavoidable collision between our Galaxy and our nearest neighbour - the Andromeda galaxy. The article has...
The research group welcomes Esra Verspui, Viola Varga and Leevi Mänttäri, who have joined the group for three months over the summer period. Esra, Viola and...
In this article, we study the recent discoveries of large-scale features in the structure of the Universe that extend over hundreds of megaparsecs in apparen...
In this article, we use the KETJU code, which resolves the gravitational dynamics in the vicinity of massive stars and their remnants to study the formation,...
Our article explores the effect an SMBH ejected from the centre of the galaxy through a gravitational wave-induced kick after coalescence has on the surround...
In this article, we study the sinking of seed black holes using simulations that resolve the black hole dynamics in three stages, with KETJU employed at the ...
In this article, we study the impact of nuclear star clusters on central star formation and massive black hole growth in dwarf galaxies. The simulations are ...
In this article, we use N-body simulations run with the KETJU code to study the evolution of high-redshift compact galaxies into present-day early-type galax...
In this article, we study the formation and evolution of cold gas clouds in a high-resolution dwarf merger simulation. The clouds have masses and sizes that ...
The research group welcomes one postdoc, Dr. Gábor Rácz and one PhD student, M.Sc. Jenni Häkkinen, who have both joined the group to work on SIBELIUS/APRIORI...
In this article we systematically study the dynamical sinking of massive black holes in low mass galaxies using the KETJU code. Our idealized high-resolution...
The research group welcomes two postdocs, Dr. Bastián Reinoso, Dr. Toni Tuominen and one PhD student, M.Sc. Max Mattero, who all have joined the group to wor...
The research group welcomes Rilla Laitila, Roosa Heiskanen, Meri Teeriaho, who have joined the group for three months over the summer period. Rilla, Roosa a...
In this article we systematically study the impact of AGN feedback on the evolution of a coalescing supermassive black holes in both disk-disk and elliptical...
In this article we systematically study the impact of galaxy formation processes (i.e. gas cooling, star formation, supermassive black hole (SMBH) accretion,...
In this article led by researchers at the University of St. Andrews we study the chemical enrichment and quenching of star formation in a sample of observed...
In this article published in Nature Astronomy, we use the SIBELIUS DARK constrained simulation to study the distribution of the brightest ellipticals and th...
Applications are now open for a position as Postdoctoral Researcher - apply by December 15!
Our article explores the relationship between the deflection angle (or equivalently, the impact parameter) between two supermassive black holes in an isolate...
Applications are now open for a position as Postdoctoral Researcher - apply by October 6!
Our article takes a fresh look at the Timing Argument, a classical method to infer the mass of the Local Group from the measured kinematics. Using a large co...
The code paper describing our publicly released version of KETJU has now been published in MNRAS.
The research group congratulates group member Till Sawala who received funding from the Academy of Finland for the research project titled: “APRIORI - Astro...
The research group welcomes Rilla Laitila, Max Mattero and Sonja Soininen, who have joined the group for three months over the summer period. Rilla, Max and...
Our article describing how the mass of the Local Group and the mass of its two most massive members (the Milky Way and M31) can be constrained using the extr...
An article describing the astrophysical studies to be conducted with the LISA Interferometer Space Antenna to be launched in the 2030s. This is a multi-autho...
Our article describing the growth of black holes in stellar clusters through tidal captures and tidal disruption events has now been published in MNRAS. Th...
Our article describing a new accretion and feedback model for SMBH binaries in KETJU simulations has now been published in MNRAS.
In this article published in Nature Astronomy, we show how the configuration of Milky Way’s satellite galaxies is actually consistent with the standard ΛCDM...