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

News items (recent peer-reviwed research publications are further below):

"The dark matter myth" - interview by the Institute of Arts and Ideas at the HowTheLightGetsIn Festival, Wales, 2022

Released Aug.5th, 2023

Colloquium at Sun Yat-sen University: "The stellar Initial Mass Function"

April 7th, 2022. The modern astrophysical understanding of the IMF and its variation

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, Golden Webinar on YouTube

Supermassive black holes: monsters in the early Universe

Oct.21st, 2021, Quid Ultra? lecture on YouTube

Recent Publications:

The many tensions with dark-matter based models and implications on the nature of the Universe

Kroupa, Gjergo, Asencio, Haslbauer, Pflamm-Altenburg, Wittenburg, Samaras, Thies, Oehm (PoS, 2023)

The convective kissing instability in low-mass M-dwarf models: convective overshooting, semi-convection, luminosity functions, surface abundances and star cluster age dating

Mansfield, Kroupa (MMNRAS, 2023)

The integrated galaxy-wide stellar initial mass function over the radial acceleration range of early-type galaxies

Dabringhasuen, Kroupa (MNRAS, 2023)

The cosmological star formation history from the Local Cosmological Volume of galaxies and constraints on the matter homogeneity

Haslbauer, Kroupa, Jerabkova (MNRAS, 2023)

The El Gordo galaxy cluster challenges {\Lambda}CDM for any plausible collision velocity

Asencio, Banik, Kroupa (ApJ, in press)

Hydrodynamical structure formation in Milgromian cosmology

Wittenburg, Kroupa, Banik, Candlish (MNRAS, 2023)

On the degree of stochastic asymmetry in the tidal tails of star clusters

Pflamm-Altenburg, Kroupa, Thies, Jerabkova, Beccari, Prusti, Boffin (A & A, 2023)

The Possible Emergence of an Attractive Inverse-Square Law from the Wave-Nature of Particles

Zhang, Kroupa, Pflamm-Altenburg, Schmid (Advances in High Energy Physics, 2022)

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.

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)

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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