Moritz Haslbauer
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View article: The Magellanic Clouds Are Very Rare in the IllustrisTNG Simulations
The Magellanic Clouds Are Very Rare in the IllustrisTNG Simulations Open
The Large and Small Magellanic Clouds (LMC and SMC) form the closest interacting galactic system to the Milky Way, therewith providing a laboratory to test cosmological models in the local Universe. We quantify the likelihood for the Magel…
View article: The effect of the environment-dependent stellar initial mass function on the photometric properties of star-forming galaxies
The effect of the environment-dependent stellar initial mass function on the photometric properties of star-forming galaxies Open
Context. Observational estimates of galaxy properties, including mass and star formation rates (SFRs), rely on the inherent galaxy-wide initial mass function (gwIMF), which systematically varies with the global SFR and metallicity, as prop…
View article: The effect of the environment-dependent stellar initial mass function on the photometric properties of star-forming galaxies
The effect of the environment-dependent stellar initial mass function on the photometric properties of star-forming galaxies Open
(Abridged) Observational estimates of galaxy properties rely on the inherent galaxy-wide initial mass function (gwIMF), which systematically varies with the global SFR and metallicity, as proposed by the integrated-galactic IMF (IGIMF) the…
View article: Correction to: The formation of early-type galaxies through monolithic collapse of gas clouds in Milgromian gravity
Correction to: The formation of early-type galaxies through monolithic collapse of gas clouds in Milgromian gravity Open
International audience
View article: The many tensions with dark-matter based models and implications on the nature of the Universe
The many tensions with dark-matter based models and implications on the nature of the Universe Open
The current standard models of cosmology (SMoC) - specifically LCDM and warm dark matter models - served for a few decades as the basis of research in astronomy and cosmology, and have been studied extensively. However, fundamental tension…
View article: The many tensions with dark-matter based models and implications on the nature of the Universe
The many tensions with dark-matter based models and implications on the nature of the Universe Open
(Abridged) Fundamental tensions between observations and dark-matter based cosmological models have emerged. This updated review has two purposes: to explore new tensions that have arisen in recent years, compounding the unresolved tension…
View article: The cosmological star formation history from the Local Cosmological Volume of galaxies and constraints on the matter homogeneity
The cosmological star formation history from the Local Cosmological Volume of galaxies and constraints on the matter homogeneity Open
The Lilly-Madau plot is commonly interpreted as the history of the cosmic star formation of the Universe by showing the co-moving star formation rate density (SFRD) over cosmic time. Therefore, the Lilly-Madau plot is sensitive not only to…
View article: A simultaneous solution to the Hubble tension and observed bulk flow within 250 <i>h</i>−1 Mpc
A simultaneous solution to the Hubble tension and observed bulk flow within 250 <i>h</i>−1 Mpc Open
The Λ cold dark matter (ΛCDM) standard cosmological model is in severe tension with several cosmological observations. Foremost is the Hubble tension, which exceeds 5σ confidence. Galaxy number counts show the Keenan–Barger–Cowie (KBC) sup…
View article: Has JWST Already Falsified Dark-matter-driven Galaxy Formation?
Has JWST Already Falsified Dark-matter-driven Galaxy Formation? Open
The James Webb Space Telescope (JWST) discovered several luminous high-redshift galaxy candidates with stellar masses of M * ≳ 10 9 M ⊙ at photometric redshifts z phot ≳ 10, which allows to constrain galaxy and structure formation models. …
View article: Has JWST already falsified dark-matter-driven galaxy formation?
Has JWST already falsified dark-matter-driven galaxy formation? Open
The James Webb Space Telescope (JWST) discovered several luminous high-redshift galaxy candidates with stellar masses of $M_{*} \gtrsim 10^{9} \, \rm{M_{\odot}}$ at photometric redshifts $z_{\mathrm{phot}} \gtrsim 10$ which allows to const…
View article: The formation of early-type galaxies through monolithic collapse of gas clouds in Milgromian gravity
The formation of early-type galaxies through monolithic collapse of gas clouds in Milgromian gravity Open
Studies of stellar populations in early-type galaxies (ETGs) show that the more massive galaxies form earlier and have a shorter star formation history. In this study, we investigate the initial conditions of ETG formation. The study begin…
View article: The High Fraction of Thin Disk Galaxies Continues to Challenge ΛCDM Cosmology
The High Fraction of Thin Disk Galaxies Continues to Challenge ΛCDM Cosmology Open
Any viable cosmological framework has to match the observed proportion of early- and late-type galaxies. In this contribution, we focus on the distribution of galaxy morphological types in the standard model of cosmology (Lambda cold dark …
View article: [CII] line intensity mapping the epoch of reionization with the Prime-Cam on FYST
[CII] line intensity mapping the epoch of reionization with the Prime-Cam on FYST Open
Aims. We predict the three-dimensional intensity power spectrum (PS) of the [CII] 158 μm line throughout the epoch of (and post) reionization at redshifts from ≈3.5 to 8. We study the detectability of the PS in a line intensity mapping (LI…
View article: Fast galaxy bars continue to challenge standard cosmology
Fast galaxy bars continue to challenge standard cosmology Open
Many observed disc galaxies harbour a central bar. In the standard cosmological paradigm, galactic bars should be slowed down by dynamical friction from the dark matter halo. This friction depends on the galaxy’s physical properties in a c…
View article: On the absence of backsplash analogues to NGC 3109 in the ΛCDM framework
On the absence of backsplash analogues to NGC 3109 in the ΛCDM framework Open
The dwarf galaxy NGC 3109 is receding 105 km s−1 faster than expected in a Lambda cold dark matter (ΛCDM) timing argument analysis of the Local Group and external galaxy groups within 8 Mpc. If this few-body model accurately represents lon…
View article: The KBC void and Hubble tension contradict ΛCDM on a Gpc scale − Milgromian dynamics as a possible solution
The KBC void and Hubble tension contradict ΛCDM on a Gpc scale − Milgromian dynamics as a possible solution Open
The KBC void is a local underdensity with the observed relative density contrast δ ≡ 1 − ρ/ρ0 = 0.46 ± 0.06 between 40 and 300 Mpc around the Local Group. If mass is conserved in the Universe, such a void could explain the 5.3σ Hubble tens…
View article: Constraints on the star formation histories of galaxies in the Local Cosmological Volume
Constraints on the star formation histories of galaxies in the Local Cosmological Volume Open
The majority of galaxies with current star formation rates (SFRs), $\rm SFR_{\rm o} \ge 10^{-3} \, M_\odot\,yr^{-1}$, in the Local Cosmological Volume, where observations should be reliable, have the property that their observed SFRo is la…
View article: Erratum: The ultra-diffuse dwarf galaxies NGC 1052-DF2 and 1052-DF4 are in conflict with standard cosmology
Erratum: The ultra-diffuse dwarf galaxies NGC 1052-DF2 and 1052-DF4 are in conflict with standard cosmology Open
This is an erratum to the paper 'The ultra-diffuse dwarf galaxies NGC 1052-DF2 and 1052-DF4 are in conflict with standard cosmology' published in MNRAS 489 (2), 2634-2651 (2019).Sentence number five in the abstract has been corrected for a…
View article: The Star Formation History and Dynamics of the Ultra-diffuse Galaxy Dragonfly 44 in MOND and MOG
The Star Formation History and Dynamics of the Ultra-diffuse Galaxy Dragonfly 44 in MOND and MOG Open
The observed line-of-sight velocity dispersion σ los of the ultra-diffuse galaxy Dragonfly 44 (DF44) requires a Newtonian dynamical mass-to-light ratio of solar units. This is well outside the acceptable limits of our stellar population sy…
View article: The ultra-diffuse dwarf galaxies NGC 1052-DF2 and 1052-DF4 are in conflict with standard cosmology
The ultra-diffuse dwarf galaxies NGC 1052-DF2 and 1052-DF4 are in conflict with standard cosmology Open
Recently van Dokkum et al. reported that the galaxy NGC 1052-DF2 (DF2) lacks dark matter if located at 20 Mpc from Earth. In contrast, DF2 is a dark-matter-dominated dwarf galaxy with a normal globular cluster population if it has a much s…