Small scale problems of the ΛCDM model: a short review

A Del Popolo, M Le Delliou - Galaxies, 2017 - mdpi.com
The ΛCDM model, or concordance cosmology, as it is often called, is a paradigm at its
maturity. It is clearly able to describe the universe at large scale, even if some issues remain …

Very high redshift quasars and the rapid emergence of supermassive black holes

P Kroupa, L Subr, T Jerabkova… - Monthly Notices of the …, 2020 - academic.oup.com
The observation of quasars at very high redshift such as Pōniuā'ena is a challenge for
models of supermassive black hole (SMBH) formation. This work presents a study of SMBH …

The energy distribution of the first supernovae

I Koutsouridou, S Salvadori, Á Skúladóttir… - Monthly Notices of …, 2023 - academic.oup.com
The nature of the first Pop III stars is still a mystery and the energy distribution of the first
supernovae is completely unexplored. For the first time we account simultaneously for the …

Impact of metallicity and star formation rate on the time-dependent, galaxy-wide stellar initial mass function

T Jeřábková, AH Zonoozi, P Kroupa, G Beccari… - Astronomy & …, 2018 - aanda.org
The stellar initial mass function (IMF) is commonly assumed to be an invariant probability
density distribution function of initial stellar masses. These initial stellar masses are …

The evolution of CNO isotopes: a new window on cosmic star formation history and the stellar IMF in the age of ALMA

D Romano, F Matteucci, ZY Zhang… - Monthly Notices of …, 2017 - academic.oup.com
We use state-of-the-art chemical models to track the cosmic evolution of the CNO isotopes in
the interstellar medium of galaxies, yielding powerful constraints on their stellar initial mass …

Galaxies as simple dynamical systems: observational data disfavor dark matter and stochastic star formation

P Kroupa - Canadian Journal of Physics, 2015 - cdnsciencepub.com
According to modern theory, galactic evolution is driven by the dynamics of dark matter and
stochastic star formation, but galaxies are observed to be simple systems. The existence of …

Metal Mixing in the r-process Enhanced Ultrafaint Dwarf Galaxy Reticulum II

AP Ji, JD Simon, IU Roederer, E Magg… - The Astronomical …, 2023 - iopscience.iop.org
The ultrafaint dwarf galaxy Reticulum II was enriched by a single rare and prolific r-process
event. The r-process content of Reticulum II thus provides a unique opportunity to study …

LOSS revisited. II. The relative rates of different types of supernovae vary between low-and high-mass galaxies

O Graur, FB Bianco, M Modjaz, I Shivvers… - The Astrophysical …, 2017 - iopscience.iop.org
LOSS Revisited. II. The Relative Rates of Different Types of Supernovae Vary between Low-
and High-mass Galaxies - IOPscience This site uses cookies. By continuing to use this site …

Review of solutions to the cusp-core problem of the ΛCDM model

A Del Popolo, M Le Delliou - Galaxies, 2021 - mdpi.com
This review aims at proposing to the field an overview of the Cusp-core problem, including a
discussion of its advocated solutions, assessing how each can satisfactorily provide a …

Ultra-faint dwarf galaxies: unveiling the minimum mass of the first stars

M Rossi, S Salvadori… - Monthly Notices of the …, 2021 - academic.oup.com
The non-detection of zero-metallicity stars in ultra-faint dwarf galaxies (UFDs) can be used to
constrain the initial mass function (IMF) of the first (PopIII) stars by means of a statistical …