The 2nd Shanghai Assembly on Cosmology and Structure Formation

Session

halo: dark matter profile

Oct 31, 2023, 2:00 PM

Conference Hall (TD Lee Library)

Conveners

halo: dark matter profile

• Jiaxin Han (Shanghai Jiao Tong University)

50. Self-interacting dark matter and its role in the structural diversity issue of dwarf galaxies

Fangzhou Jiang (Peking University)

10/31/23, 2:00 PM

Small-scale structure

Talk

One of the most persistent small-scale challenges to the LCDM paradigm is the striking structural diversity of dwarf galaxies. Cosmological simulations struggle in reproducing the full range of galaxy size or the inner dark-matter distribution as inferred from kinematics observations. While there have been efforts resorting to fine-tuning baryonic feedback and environmental effects, simple...

13. Is the Core-cusp Problem a Matter of Perspective?

Wenting Wang (SJTU)

10/31/23, 2:25 PM

Small-scale structure

Talk

Mock member stars for dwarf galaxies are constructed from the cosmological AURIGA simulation, which reflects the dynamical status of realistic stellar tracers. Axisymmetric Jeans Anisotropic Multi-Gaussian Expansion (JAM) modeling is applied to each system to recover the underlying matter distribution. The stellar or dark matter component individually is poorly recovered, but the total profile...

36. A strong lensing view of the core-cusp problem

Alessandro Sonnenfeld (SJTU)

10/31/23, 2:45 PM

Small-scale structure

Talk

Mapping the dark matter distribution in the Universe is of fundamental importance for both galaxy evolution and cosmology.
Observationally, one of the outstanding questions regarding dark matter is the so-called "core vs. cusp problem": how steep is the inner dark matter density profile of galaxies? The answer to this question can give us important insight on the relative importance of...