Cosmology 2023 in Miramare

Session

Parallel

30 Aug 2023, 15:00

Main Auditorium (SISSA Building, Miramare, Trieste, Italy)

118. Addressing the M-beta Degeneracy to Better Constrain the Velocity Anisotropies and Matter Distributions of Milky Way Dwarf Spheroidals

Casey Watson

30/08/2023, 15:00

We use surface brightness and velocity dispersion data to constrain the properties of 10 Milky Way dwarf spheroidal galaxies (dSphs), which span over an order of magnitude in effective radius, over 4 orders of magnitude in stellar mass, and show no signs of tidal disruption. To alleviate the degeneracy between galaxy mass and velocity anisotropy (beta), the “M-beta degeneracy”, we consider...

119. Probing Lorentz-violating electrodynamics with CMB polarization

Margherita Lembo

30/08/2023, 15:00

The talk will be based on this paper JCAP03(2023)018. In this work, we performed a comprehensive study of the signatures of Lorentz violation in electrodynamics on the Cosmic Microwave Background (CMB) anisotropies. In the framework of the minimal Standard Model Extension (SME), we considered effects generated by renormalizable operators, both CPT-odd and CPT-even. These operators are...

158. Multifield Ultralight Dark Matter

Mateja Gosenca (University of Vienna)

30/08/2023, 15:25

Ultralight dark matter (ULDM) is an intriguing dark matter candidate with astrophysically testable predictions. While single field models have been widely studied, they are by now fairly constrained by observations. However, in particle physics, models with N light scalar fields which interact only gravitationally are equally well motivated. In my talk, I will explore this possibility and...

121. On the environmental dependence of galaxy properties in dusty semi-analytical models

Massimiliano Parente

30/08/2023, 15:25

We have recently implemented in the public L-Galaxies 2020 semi-analytical model our treatment of dust production from evolved stars and subsequent evolution driven by ISM processes. In this contribution, we discuss how the properties of simulated galaxies depend on the large-scale environment, focusing in particular on their dust component.