The Stellar Populations and Dynamics Research Group

(The SPODYR Group)

Perth and the Indian Ocean, March 2016

Prof. Dr. Pavel Kroupa (CV)

I like knedliky and dark matter. But knedliky can be eaten while dark matter cannot. Also, dark matter does not appear to exist . (adapted from Jaroslav Haas, Oct.2nd, 2019 in Praha when introducing my colloquium on the IMF)

Helmholtz-Institut fuer Strahlen- und Kernphysik, Theory Group, Universitaet Bonn

Rheinische Friedrich-Wilhelms-Universitaet
Nussallee 14-16
D-53115 Bonn

Postal and office address:
Argelander-Institut fuer Astronomie, Universitaet Bonn

Rheinische Friedrich-Wilhelms-Universitaet
Auf dem Huegel 71
D-53121 Bonn

Also professorem hospitem at:
Astronomical Institute of the Charles University in Prague

Faculty of Mathematics and Physics
v Holesovickach 2
18000 Praha 8
Czech Republic

e-mail: pkroupa (at) / kroupa (at)
Tel: +49 (0)228 73-6140(office) // 73-3655 / -2366(secretary)
Fax: +49 (0)228 73-7666 / -2505

Golden Webinar: "From Believe to Realism and Beauty: Given the Non-Existence of Dark Matter, how do I navigate amongst the Stars and between Galaxies?"

April 9th, 2021, 11am in Santiago = 5pm in Brussels

Supermassive black holes: monsters in the early Universe

Oxford University Press Blog, Nov.3rd, 2020

The enduring mystery of how galaxies grow up

Oxford University Press Blog, Sept.28th, 2020

A travel report for the Erasmus+ programme led by Petr Kabath at Onrejov Observatory:

La Palma, three events in the Orion Nebula Cluster and the Corona Crisis

The citizens of my birth of town, Jindrichuv Hradec, awarded me a Crystal Rose on
October 25th, 2019

Recent Publications:

Do ultra compact dwarf galaxies form monolithically or as merged star cluster complexes?

Mahani, Zonoozi, Haghi, Jerabkova, Kroupa, Mieske (MNRAS, 2021)

IMF-induced intrinsic uncertainties on measuring galaxy distances based on the number of giant stars: the case of the ultra-diffuse galaxy NGC 1052-DF2

Zonoozi, Haghi, Kroupa (MNRAS, 2021)

On the absence of backsplash analogues to NGC 3109 in the ΛCDM framework

Banik, Haslbauer, Pawlowski, Famaey, Kroupa (MNRAS, 2021)

Barred spiral galaxies in modified gravity theories

Roshan, Banik, Ghafourian, Thies, Famaey, Asencio, Kroupa (MNRAS, 2021)

3D Morphology of Open Clusters in the Solar Neighborhood with Gaia EDR3: its Relation to Cluster Dynamics

Pang, Li, Yu, Tang, Dinnbier, Kroupa, Pasquato, Kouwenhoven (ApJ, 2021)

The Phantom of RAMSES user guide for galaxy simulations using Milgromian and Newtonian gravity

Nagesh, Banik, Thies, Kroupa, Famaey, Wittenburg, Parziale, Haslbauer (Canadian Journal of Physics, 2021)

A massive blow for LCDM - the high redshift, mass, and collision velocity of the interacting galaxy cluster El Gordo contradicts concordance cosmology

Asencio, Banik, Kroupa (MNRAS, 2021)

The Global Stability of M33 in MOND

Banik, Thies, Famaey, Candlish, Kroupa, Ibata (ApJ, 2020)

The Lifetimes of Star Clusters Born with a Top-heavy IMF

Haghi, Safaei, Zonoozi, Kroupa (ApJ, 2020)

The KBC void and Hubble tension contradict LCDM on a Gpc scale - Milgromian dynamics as a possible solution

Haslbauer, Banik, Kroupa (MNRAS, 2020)

Very high redshift quasars and the rapid emergence of super-massive black holes

Kroupa, Subr, Jerabkova, Wang (MNRAS, 2020)

Constraints on the star formation histories of galaxies in the Local Cosmological Volume

Kroupa, Haslbauer, Banik, Nagesh, Pflamm-Altenburg (MNRAS, 2020)

Tidal tails of open star clusters as probes to early gas expulsion I: A semi-analytic model

Dinnbier, Kroupa (A&A, 2020)

Tidal tails of open star clusters as probes to early gas expulsion II: Predictions for Gaia

Dinnbier, Kroupa (A&A, 2020)

The formation of exponential disk galaxies in MOND

Wittenburg, Kroupa & Famaey (ApJ, 2020)

The failure of testing for cosmic opacity via the distance-duality relation

Vavrycuk, Kroupa (MNRAS, 2020)

Scale-invariant dynamics in the Solar system

Banik, Kroupa (MNRAS, 2020)

Solar System limits on gravitational dipoles

Banik, Kroupa (MNRAS, 2020)

2015: Phantom of Ramses (PoR) code for galaxy formation and evolution in Milgromian dynamics/MOND:

With a small grant from the Rectorate of the University of Bonn PK received in 2013, Fabian Lueghausen (in collaboration with Benoit Famaey and Pavel Kroupa) was able to develop in 2014 and 2015 a patch to Romain Teyssier's RAMSES code to allow dark-matter-free high-resolution simulations of galaxy formation and evolution.
The Phantom of Ramses (PoR) code is a patch to RAMSES. By default the patch comes with the RAMSES code whenever it is downloaded.

See the following link as to why cold or warm dark matter particles are not a dynamically relevant part of the Universe:
The Dark Matter Crisis: the rise and fall of a cosmological hypothesis

Press Releases

I travel- here at Munich airport, August 14th 2019

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