Three problems about multi-scale modelling in cosmology
arXiv:1804.07704 · doi:10.1016/j.shpsb.2018.04.002
Abstract
The debate in cosmology concerning LambdaCDM and MOND depends crucially on their respective ability of modelling across scales, and dealing with some of the specific problems that arise along the way. The main upshot of this article is to present three main problems facing multi-scale modelling in contemporary cosmology. The LambdaCDM model, which is the standard and by far most successful current cosmological model, faces what I call the downscaling problem when it comes to explain some recalcitrant evidence at the scale of individual galaxies, such as the mass-discrepancy acceleration relation (MDAR) and the baryonic Tully-Fisher relation (BTF). While the fastgrowing development of computer simulations has addressed these problems, nagging worries remain about some of the epistemic limits of these computer simulations in retrieving (as opposed to explaining) the data. The so-called upscaling problem affects MOND and its ability not just to explain but even simply retrieve large-scale structure and galaxy clusters. Recent attempts at extending MOND (EMOND) have had a limited empirical success, and are still far from providing a consistent explanation for possible formation mechanisms at the large-scale structure. Finally, the in between scales problem affects proposals designed to achieve the best of both worlds at the meso-scale. This is a fascinating area from a physical and a philosophical point of view, where the main challenge is the ability to have genuine predictive novelty.
References in corpus (17)
- Results from a search for dark matter in the complete LUX exposure
- Too big to fail? The puzzling darkness of massive Milky Way subhaloes
- Dark Matter Results from First 98.7-day Data of PandaX-II Experiment
- Discovery of a Very Bright Strongly-Lensed Galaxy Candidate at z ~ 7.6
- A Tale of Two Paradigms: the Mutual Incommensurability of LCDM and MOND
- X-ray Group and cluster mass profiles in MOND: Unexplained mass on the group scale
- Model of Dark Matter and Dark Energy Based on Gravitational Polarization
- Cosmology and Convention
- Inflation and High-Scale Supersymmetry with an EeV Gravitino
- Testing Verlinde's Emergent Gravity with the Radial Acceleration Relation
- Marriage à-la-MOND: Baryonic dark matter in galaxy clusters and the cooling flow puzzle
- The new semianalytic code GalICS 2.0 - Reproducing the galaxy stellar mass function and the Tully-Fisher relation simultaneously
- Spontaneous breaking in QCD and the axion potential: an effective Lagrangian approach
- Emergence of the mass discrepancy-acceleration relation from dark matter-baryon interactions
- Planck intermediate results. LVI. Detection of the CMB dipole through modulation of the thermal Sunyaev-Zeldovich effect: Eppur si muove II
- Emergent gravity in galaxies and in the Solar System
- Perspective on MOND emergence from Verlinde's "emergent gravity" and its recent test by weak lensing
Cited by in corpus (7)
- Hydrostatic mass profiles in X-COP galaxy clusters
- From galactic bars to the Hubble tension: weighing up the astrophysical evidence for Milgromian gravity
- MOND vs. dark matter in light of historical parallels
- Methodological Reflections on the MOND/Dark Matter Debate
- Integrating Dark Matter, Modified Gravity, and the Humanities
- Why did the dark matter hypothesis supersede modified gravity in the 1980s?
- Validating the Universe in a Box