26-30 July 2021
Zoom
Europe/Berlin timezone

Dark-matter halo shapes from fits to SPARC galaxy rotation curves

Not scheduled
20m
Zoom

Zoom

Poster Dark Matter T03: Dark Matter

Speaker

Felipe J. Llanes-Estrada (Universidad Complutense de Madrid, dept. Fisica Teorica)

Description

We fit galactic rotation curves obtained by SPARC from dark matter haloes that are not spherically symmetric, but allowed to become prolate or oblate with a higher-multipole density distribution. This is motivated by observing that the flattening of v(r)=constant is the natural Kepler law due to a filamentary rather than a spherical source, so that elongating the distribution could bring about a smaller chi squared, all other things being equal. We compare results with several different dark matter profiles and the extracted best fits to the ellipticity computed in cosmological simulations of dark matter haloes. The shape distortion can impact our understanding of the local density of dark matter and thus be of interest for the direct detection program.

Collaboration / Activity Theory

Primary authors

Adriana Bariego Quintana (Universidad Complutense de Madrid) Felipe J. Llanes-Estrada (Universidad Complutense de Madrid, dept. Fisica Teorica) Oliver Manzanilla Carretero (Universidad Complutense de Madrid)

Presentation Materials