Theoretical Extragalactic Research Group

The 10 most recent publications from the research group:

  1. 1) Structure and rotation of young massive star clusters in a simulated dwarf starburst
    N. Lahén
    , T.Naab, P.H. Johansson, T. Naab, B. Elmegreen, C.-Y. Hu, S. Walch, 2020, ApJ, submitted, ArXiv:  2008.04320

  2. 2) The Star-Formation Properties of the Observed and Simulated AGN Universe: BAT vs EAGLE
    T.M. Jackson, D.J. Rosario, D.M. Alexander, S. McAlpine, R. G. Bower, MNRAS, in press, ArXiv:2008.05115

  3. 3) Setting the Stage: Structures of Gaussian Random Fields
    T. Sawala
    , A. Jenkins, S. McAlpine, J. Jasche, G. Lavaux, P.H. Johansson, C.S. Frenk, 2020, MNRAS,  submitted, ArXiv: 2005.14112

  4. 4) Comparison of stellar populations in simulated and real post-starburst galaxies in ManGA
    Y. Zheng, V. Wild, N. Lahén, P.H. Johansson, D. Law, J.R. Weaver, N. Jimenez, 2029, MNRAS, in press, ArXiv: 2005.14112

  5. 5) Galaxy mergers in EAGLE do not induce a significant amount of black hole growth yet do increase the rate of luminous AGN
    S. McAlpine
    , C.M. Harrison, D.J. Rosario, D.M. Alexander, S.L. Ellison, P.H. Johansson, D.R. Patton, 2020, MNRAS, 494, 5713

  6. 6) The GRIFFIN project - Formation of star clusters with individual massive stars in a simulated dwarf galaxy
    N. Lahén
    , T.Naab, P.H. Johansson, T. Naab, B. Elmegreen, C.-Y. Hu, S. Walch, U.P. Steinwandel, B.P. Moster, 2020, ApJ, 891, 2

  7. 7) MSTAR - a fast parallelized algoritmically regularized integrator with minimum spanning tree coordinates
    A. Rantala, P. Pihajoki, M.Mannerkoski, P.H. Johansson, T. Naab, 2020, MNRAS, 492, 4131

  8. 8) Gravitational waves from the inspiral of supermassive black holes in galactic-scale simulations
    M.Mannerkoski
    , P.H. Johansson, P. Pihajoki, A. Rantala, T. Naab, 2019, ApJ, 87, 35

  9. 9)Barycentric interpolation on Riemannian and semi-Riemannian spaces
    P. Pihajoki, M. Mannerkoski, P.H. Johansson
    , 2019, MNRAS, 489, 4161

  10. 10) The nature of submillimetre and highly star-forming galaxies in the EAGLE simulations
    S. McAlpine, I. Smail, R.G. Bower, A.M. Swinbank, J.W. Trayford, T. Theuns, M. Baes, P. Camps, R.A. Crain, J. Schaye, 2019, MNRAS, 488, 2440

Current members in the research group:

Prof. Peter Johansson (group leader)
Dr. Till Sawala (Academy research fellow)

Dr. Stuart McAlpine (postdoc)
Dr. Shihong Liao (postdoc)
M.Sc. Matias Mannerkoski (PhD student)

B.Sc. Alexander Rawlings (undergraduate student)

B.Sc. Atte Keitaanranta (undergraduate student)


Past members of the research group:

Dr. John Regan (Royal Society fellow at Maynooth University)
Dr. Antti Rantala (Postdoc at MPA)
Dr. Natalia Lahén (Postdoc at MPA)
Dr. Pauli Pihajoki (Silo AI)


Collaborators at the University of Helsinki:
Prof. Alexis Finoguenov
Prof. Kari Enqvist
Dr. Mika Juvela
Dr. Hannu Kurki-Suonio
Dr. Syksy Räsänen


External Collaborators:
Dr. Thorsten Naab (MPA)

Dr. Jens Thomas (MPE)
Prof. Jeremiah Ostriker (Columbia/Princeton)

Dr. John Regan (Dublin City University)
Dr. Vivienne Wild (St. Andrews)
Prof. John Wise (Georgia Institute of Technology)

Dr. Petri Väisänen (South African Astronomical Observatory)
Prof. Carlos Frenk (Durham)

Prof. Simon White (MPA)

Prof. Andreas Burkert (Munich)
Prof. Martin Haehnelt (Cambridge)
Prof. Rachel Somerville (Rutgers)

Dr. Ben Moster (Munich)

Dr. Ena Choi (Rutgers)
Dr. Rhea-Silvia Remus (Munich)


Supervision of theses:

Recent Ph.D. Theses completed in the research group:

  1. 1) Natalia Lahén: “Hydrodynamical simulations and synthetic observations of merging galaxies”, June, 2020

  2. 2) Antti Rantala: “Modeling supermassive black hole dynamics in galactic-scale numerical simulations”, July, 2019


Recent M.Sc. Theses completed in the research group:

  1. 8) Joonas Suortti: “Simulating Core Formation Through Supermassive Black hole Mergers”, January, 2020

  2. 7) Vili Oja: “Simulating the dynamics of supermassive black holes”, December, 2019

  3. 6) Anni Järvenpää: “Statistical estimation of the Local Group Mass”, December, 2018

  4. 5) Matias Mannerkoski: “Ray-Tracing Based Polarized Radiative Transfer in General Spacetimes, March, 2018

  5. 4) Lasse Liljedahl: “The Effects of Supernova Feedback on Disk Galaxy Formation”, December, 2017

  6. 3) Natalia Lahén: “Equal-mass Galaxy Mergers: Initial Conditions and Subresolution Astrophysics”, April, 2015

  7. 2) Antti Rantala: “Forming Galaxies in Cosmological Zoom-in Simulations”, March, 2014.

  8. 1) Heidi Yli-Kankahila: “Formation of Early-type galaxies through mergers of gas-rich disk galaxies”, October, 2012.

    Recent B.Sc. Theses completed in the research group (in Finnish):

  9. 11) Atte Keitaanranta: “Supermassiivisten mustien aukkojen rooli galakseissa”, June, 2020

  10. 10) Pekka Lampio: “Logaritmisen Hamiltonin funktion käyttö taivaanmekaniikassa”, June, 2019

  11. 9) Kasper Siilin: “Kahden jakson inflaatio ja rakenteenmuodostus standardi-LCDM-kosmologiassa”, August, 2018

  12. 8) Vili Oja: “Ellipsigalaksien rakenne, synty ja kehitys”, July,  2018

  13. 7) Sanna Damsted: “Missä ovat puuttuvat kääpiögalaksit? - Tutkielma havaintojen ja LCDM-teorian välillä vallitsevan ristiriidan nykytilasta”, August, 2017

  14. 6) Antton Luoma “Spiraaligalaksien rakenne ja kehitys”, February 2016

  15. 5) Anni Järvenpää: “AMR-simulaatiotulosten visualisointi Pythonilla yt-pakettia käyttäen”, July 2015

  16. 4) Akke Viitanen: “Universumin suuren mittakaavan rakenne”, July 2015

  17. 3) Jussi Aaltonen: “Pimeä aine ja maailmankaikkeuden rakenteenmuodostus, March, 2015.

  18. 2) Natalia Lahén: “Galaksienväliset vuorovaikutukset”,
    February, 2014.

  19. 1) Antti Rantala: “Pimeä energia ja maailmankaikkeuden kiihtyvä laajeneminen”, July, 2012.


Research topics for B.Sc., M.Sc. and Ph.D. Theses:

Please come and talk to me in my office (D311) and/or send
me an email.