تقرير
Revealing mass distributions of dwarf spheroidal galaxies in the Subaru-PFS era
| العنوان: | Revealing mass distributions of dwarf spheroidal galaxies in the Subaru-PFS era |
|---|---|
| المؤلفون: | Hayashi, Kohei, Dobos, Laszlo, Filion, Carrie, Kirby, Evan, Chiba, Masashi, Wyse, Rosemary F. G., Group, PFS Galactic Archaeology Science Working |
| سنة النشر: | 2023 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | 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. Comment: 6 pages, 3 figures, Accepted for publication in Proceedings of the IAUS 379: Dynamical Masses of Local Group Galaxies, Potsdam, March 20-24, 2023 |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2305.11309 |
| رقم الأكسشن: | edsarx.2305.11309 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |