5 papers · 1 filter
Rising from the Ashes II: The Bar-driven Abundance Bimodality of the Milky Way
Angus Beane, James Johnson, Vadim Semenov +3
The Milky Way hosts at least two modes in its present day distribution of Fe and alpha-elements. The exact cause of this bimodality is disputed, but one class of explanations invol…
Secular Attrition of Classical Bulges by Stellar Bars
Rachel Lee McClure, Tobias Géron, Elena D'Onghia +5
Classical bulges and stellar bars are common features in disk galaxies and serve as key tracers of galactic evolution. Angular momentum exchange at bar resonances drives secular mo…
Mapping the Milky Way in 5-D with 170 Million Stars
Joshua S. Speagle, Catherine Zucker, Ana Bonaca +18
We present "augustus", a catalog of distance, extinction, and stellar parameter estimates to 170 million stars from and with dr…
Rising from the Ashes: A Metallicity-Dependent Star Formation Gap Splits the Milky Way's alpha-Sequences
Angus Beane
The elemental abundance distribution of stars encodes the history of the gas-phase abundance in the Milky Way. Without a large, unbiased sample of highly precise stellar ages, the…
The Impact of Classical Bulges on Stellar Bars and Box-Peanut-X-Features in Disk Galaxies
Rachel Lee McClure, Angus Beane, Elena D'Onghia +2
Galactic bars and their associated resonances play a significant role in shaping galaxy evolution. Resulting resonance-driven structures, like the vertically extended Boxy/Peanut X…