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Revealing mass distributions of dwarf spheroidal galaxies in the Subaru-PFS era

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arxiv 2305.11309 v1 pith:MV3HXUR6 submitted 2023-05-18 astro-ph.GA astro-ph.CO

Kohei Hayashi , Laszlo Dobos , Carrie Filion , Evan Kirby , Masashi Chiba , Rosemary F.G. Wyse , PFS Galactic Archaeology Science Working Group This is my paper · ORCID
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keywords massdwarfgalaxiesspheroidalallowsanisotropyclosecontamination
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abstract

The Galactic dwarf spheroidal galaxies (dSphs) provide valuable insight into dark matter (DM) properties and its role in galaxy formation. Their close proximity enables the measurement of line-of-sight velocities for resolved stars, which allows us to study DM halo structure. However, uncertainties in DM mass profile determination persist due to the degeneracy between DM mass density and velocity dispersion tensor anisotropy. Overcoming this requires large kinematic samples and identification of foreground contamination. With 1.25 deg$^2$ and 2394 fibers, PFS plus pre-imaging with Hyper Suprime Cam will make significant progress in this undertaking.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Mass Modeling the Andromeda Dwarf Galaxies: Andromeda VI and Andromeda XXIII

    astro-ph.GA 2025-05 conditional novelty 6.0 of 10

    The central dark matter densities of Andromeda VI and Andromeda XXIII are measured for the first time, placing And VI in the cuspy regime and And XXIII in a low-density, core-like regime.

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