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
Germany

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

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

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) uni-bonn.de / kroupa (at) sirrah.troja.mff.cuni.cz
Tel: +49 (0)228 73-6140(office) // 73-3655 / -2366(secretary)
Fax: +49 (0)228 73-7666 / -2505





"Dark Matter Doesn't Exist"

July 12th, 2022. A piece written up for iai.


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

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


Astronomy on Tap Koeln: "Dark Matter Kindergarten Stuff"

March 3rd, 2022. Can the existence of dark matter be disproven?


HYPERRAUM.TV: "Dunkle Welt oder Kosmos im Licht?"

February 22nd, 2022. A discussion of the competing models. In German.


HYPERRAUM.TV: "Der Astro-Rebell"

December 17th, 2021. The elementary reason why the Hubble tension is not a tension. In German.


HYPERRAUM.TV: "Die vierte Kraft"

December 11th, 2021. Why has dark matter not been found? In German.


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
Oxford University Press Blog, Nov.3rd, 2020
See also this summarising poster at the EAS21 conference and contact us if you have questions:
The nature of very high redshift quasars and the rapid formation of super-massive black holes (SMBHs)
Based on Very high redshift quasars and the rapid emergence of super-massive black holes
Kroupa, Subr, Jerabkova, Wang (MNRAS, 2020)

The enduring mystery of how galaxies grow up

Oxford University Press Blog, Sept.28th, 2020
Based on Constraints on the star formation histories of galaxies in the Local Cosmological Volume
Kroupa, Haslbauer, Banik, Nagesh, Pflamm-Alenburg (MNRAS, 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:



The distribution and morphologies of Fornax Cluster dwarf galaxies suggest they lack dark matter

Asencio, Banik, Mieske, Venhola, Kroupa, Zhao (MNRAS, 2022)


3D hydrodynamic simulations for the formation of the Local Group satellite planes

Banik, Thies, Truelove, Candlish, Famaey, Pawlowski, Ibata, Kroupa (MNRAS, 2022)


Overestimated inclinations of Milgromian disc galaxies: the case of the ultradiffuse galaxy AGC 114905

Banik, Togere Nagesh, Haghi, Kroupa, Zhao (MNRAS, 2022)


Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099): II. Potential X-ray counterparts and variable sources

Mansfield, Dieball, Kroupa, Knigge, Zurek, Shara, Long (MNRAS, 2022)


Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099): I. Photometry and radial distributions

Mansfield, Dieball, Kroupa, Knigge, Zurek, Shara, Long (MNRAS, 2022)


The High Fraction of Thin Disk Galaxies Continues to Challenge LCDM Cosmology

Haslbauer, Banik, Kroupa, Wittenburg, Javanmardi (ApJ, 2022)


Do the majority of stars form as gravitationally unbound?

Dinnbier, Kroupa & Anderson (A&A, 2022)


First detection of a magnetic field in low-luminosity B[e] stars: New scenarios for the nature and evolutionary stages of FS CMa stars

Korcakova, Sestito, Manset, Kroupa, Votruba et al. (A&A, 2022)


The dynamics of spatially confined oscillations

Stadtler, Kroupa, Schmid (CaJPh, 2021)


The initial mass function of stars and the star-formation rates of galaxies

Kroupa, Jerabkova (Book Chapter)


On the dynamical evolution of Cepheids in star clusters

Dinnbier, Anderson, Kroupa (A&A, 2022)


Estimating the ages of open star clusters from properties of their extended tidal tails

Dinnbier, Kroupa, Subr, Jerabkova (ApJ, 2021)


A possible solution to the Milky Way's binary-deficient retrograde stellar population. Evidence that omega Centauri has formed in an extreme starburst

Marks, Kroupa, Dabringhausen (A&A, 2021)


BiPoS1 -- a computer programme for the dynamical processing of the initial binary star population

Dabringhausen, Marks, Kroupa (MNRAS, 2021)


Origin of the spectacular tidal shells of the galaxy NGC474

Bilek, Fensch, Ebrova et al. (A&A, 2021)


Are disks of satellites comprised of tidal dwarf galaxies?

Bilek, Thies, Kroupa, Famaey (Glaxies, 2021)


HI mapping of the Leo Triplet: Morphologies and kinematics of tails and bridges

Wu, Martinez-Delgado, Henkel, Kroupa, Walter, et al. (Astron. and Astroph., 2021)


The Kennicutt-Schmidt law and the main sequence of galaxies in Newtonian and milgromian dynamics

Zonoozi, Lieberz, Banik, Haghi, Kroupa (MNRAS, 2021)


How many explosions does one need? -- Quantifying supernovae in globular clusters from iron abundance spreads

Wirth, Jerabkova, Yan et al. (MNRAS, 2021)


Evolution of globular-cluster systems of ultra-diffuse galaxies due to dynamical friction in MOND gravity

Bilek, Zhao, Famaey et al. (MNRAS, 2021)


Downsizing revised: Star formation timescales for elliptical galaxies with an environment-dependent IMF and number of SNIa

Yan, Jerabkova, Kroupa (A&A, 2021)


Fast galaxy bars continue to challenge standard cosmology

Roshan, Ghafourian et al. (MNRAS, 2021, in press)


A discontinuity in the luminosity-mass relation and fluctuations in the evolutionary tracks of low-mass and low-metallicity stars at the Gaia M-dwarf gap

Mansfield & Kroupa (A&A, 2021)


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 LCDM 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)







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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