|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Ultra-faint dwarfs in a Milky Way context: Introducing the Mint Condition DC Justice League Simulations | | Elaad Applebaum
; Alyson M. Brooks
; Charlotte R. Christensen
; Ferah Munshi
; Thomas R. Quinn
; Sijing Shen
; Michael Tremmel
; | | Date: |
25 Aug 2020 | | Abstract: | We present results from the "Mint" resolution DC Justice League suite of
Milky Way-like zoom-in cosmological simulations, which extend our study of
nearby galaxies down into the ultra-faint dwarf regime for the first time. The
mass resolution of these simulations is the highest ever published for
cosmological Milky Way zoom-in simulations run to $z=0$, with initial star
(dark matter) particle masses of 994 (17900) M$_odot$, and a force resolution
of 87 pc. We present initial results from these simulations, focusing on both
satellite and near-field dwarf galaxies. We find that the simulated dwarfs and
ultra-faint dwarfs (UFDs) reproduce the observed structural and dynamical
properties of galaxies with $-3 < M_V < -19$. We predict the vast majority of
nearby galaxies will be observable given the surface brightness limits of the
Vera Rubin Observatory’s co-added Legacy Survey of Space and Time (LSST). We
additionally show that faint dwarfs with velocity dispersions $lesssim5$ km/s
result from severe tidal stripping of the host halo. These simulations allow us
to investigate quenching of UFDs in a hydrodynamical Milky Way context for the
first time. We find that the majority of the UFDs are quenched prior to
interactions with the Milky Way, though some of the quenched UFDs retain their
gas until infall. Additionally these simulations yield some unique dwarfs that
are the first of their kind to be simulated, e.g., an HI-rich field UFD, a
late-forming UFD that has structural properties similar to Crater 2, as well as
a compact dwarf satellite that has no dark matter at $z=0$. | | Source: | arXiv, 2008.11207 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER