Скачать или смотреть Calculating the Triaxiality and Shape Parameters of Dark Matter Halos

Welcome, my name is Phil, and in this video I discuss how to calculate the triaxiality and shape parameters of dark matter halos are.

When studying dark matter halos, scientists want to understand not just their size, but their shape, because the structure of the halo influences how galaxies form and evolve. A perfectly spherical halo behaves differently from a triaxial halo (with three different axes), especially in terms of gravitational interactions and the distribution of matter. The triaxiality and shape parameters give us insight into how a halo is shaped, and how it might influence the galaxies and stars within it.

1. Triaxiality:

Dark matter halos are often assumed to have a shape that resembles a sphere or an ellipsoid, but more advanced studies suggest that many of them are actually more irregular. Triaxiality refers to a shape where the halo has three different axes of different lengths—essentially, the halo is stretched or flattened along three distinct directions.

2. Shape Parameter:

The shape parameter is a simple measure of halo deviation from spherical symmetry from the smallest-to-largest axis ratio (𝑠)

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