Sizing from the Smallest Scales: The Mass of the Milky Way
| Autor: | M K Rodriguez Wimberly, M C Cooper, D C Baxter, M Boylan-Kolchin, J S Bullock, S P Fillingham, A P Ji, L V Sales, J D Simon |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) FOS: Physical sciences Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics - Astrophysics of Galaxies Astrophysics::Galaxy Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | As the Milky Way and its satellite system become more entrenched in near field cosmology efforts, the need for an accurate mass estimate of the Milky Way's dark matter halo is increasingly critical. With the second and early third data releases of stellar proper motions from {\it Gaia}, several groups calculated full $6$D phase-space information for the population of Milky Way satellite galaxies. Utilizing these data in comparison to subhalo properties drawn from the Phat ELVIS simulations, we constrain the Milky Way dark matter halo mass to be $\sim 1-1.2\times10^{12}~\msun$. We find that the kinematics of subhalos drawn from more- or less-massive hosts (i.e. $>1.2\times10^{12}~\msun$ or $ Key Figures: 4 and 5; 15 pages; 8 figures; accepted for publication in MNRAS 3 May 2022 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|