Challenges for ΛCDM and MOND

8th Biennial Conference on Classical and Quantum Relativistic Dynamics of Particles and Fields

Famaey, Benoit^1 ; McGaugh, Stacy^2

Observatoire Astronomique de Strasbourg, CNRS UMR 7550, France^1

Case Western Reserve University, United States^2

关键词: Cosmological modeling;    Dark matter particles;    Galaxy formations;    Large-scales;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/437/1/012001/pdf
DOI  :  10.1088/1742-6596/437/1/012001

来源: IOP

【 摘 要 】

The Universe on large scales is well described by the ΛCDM cosmological model. There however remain some heavy clouds on our global understanding, especially on galaxy scales, which we review here. While some of these clouds might perhaps disappear through small compensatory adjustments of the model, such as changing the mass of the dark matter particles or accounting better for baryonic physics, others should rather be taken as strong indications that the physics of the dark sector is, at the very least, much richer and complex than currently assumed, and that our understanding of gravity and dynamics might also be at play. For instance, the empirically well-tested MOND phenomenology in galaxies, whatever its final explanation, should be understood in any model of galaxy formation and dynamics. Current alternatives to ΛCDM however bring with them many unsolved questions and challenges.