no code implementations • 28 Jan 2021 • Nilanjan Banik, Jo Bovy
Stellar tidal streams are sensitive tracers of the properties of the gravitational potential in which they orbit and detailed observations of their density structure can be used to place stringent constraints on fluctuations in the potential caused by, e. g., the expected populations of dark matter subhalos in the standard cold dark matter paradigm (CDM).
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics
1 code implementation • 30 Nov 2020 • Joeri Hermans, Nilanjan Banik, Christoph Weniger, Gianfranco Bertone, Gilles Louppe
A statistical analysis of the observed perturbations in the density of stellar streams can in principle set stringent contraints on the mass function of dark matter subhaloes, which in turn can be used to constrain the mass of the dark matter particle.
no code implementations • 6 Nov 2019 • Nilanjan Banik, Jo Bovy, Gianfranco Bertone, Denis Erkal, T. J. L. de Boer
New data from the $\textit{Gaia}$ satellite, when combined with accurate photometry from the Pan-STARRS survey, allow us to accurately estimate the properties of the GD-1 stream.
Astrophysics of Galaxies Cosmology and Nongalactic Astrophysics