CONICET | Buscador de Institutos y Recursos Humanos

This work is mainly driven by two predictions of the current concordance cosmological model, i.e. the Lambda cold dark matter (CDM) model, which are: (i) the stellar halos of galaxies like the Milky Way are the repositories of debris from the accretion of small galaxies (ii) dark matter (DM) halos have complex density distributions. The DM halo of the Galaxy is probably triaxial and has varying axial ratios. Considering a DM halo with such properties, our objective is to establish the degree of chaoticity of the orbits present in this potential and how this chaos aﬀects the observability of tidal streams. We present here results on the degree of chaos and the location of chaotic regions for a generalized NFW triaxial potential, as quantiﬁed by the Lyapunov Indicator. We also show how diﬀerent streams on chaotic and regular orbits are, especially on the sky. This might have strong implications on the ability to recover accretion events that fell in on unfavourable orbits.