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108 papers · 2 filters
Orbital Clustering Identifies the Origins of Galactic Stellar Streams
Ana Bonaca, Rohan P. Naidu, Charlie Conroy +9
The origins of most stellar streams in the Milky Way are unknown. With improved proper motions provided by Gaia EDR3, we show that the orbits of 23 Galactic stellar streams are hig…
At Least One-in-Six Galaxies Is Always Dead
L. E. Abramson, D. D. Kelson
Via numerical experiments, we show that the 10%-20% passive fraction seen at is consistent with galaxy star formation histories being maximally correlated stochastic pr…
Prospects for Galactic and stellar astrophysics with asteroseismology of giant stars in the Continuous Viewing Zones and beyond
J. Ted Mackereth, Andrea Miglio, Yvonne Elsworth +30
The NASA- mission presents a treasure trove for understanding the stars it observes and the Milky Way, in which they reside. We present a first look at the prospects for…
The Massive M31 Cluster G1: Detailed Chemical Abundances from Integrated Light Spectroscopy
Charli M. Sakari, Matthew D. Shetrone, Andrew McWilliam +1
G1, also known as Mayall II, is one of the most massive star clusters in M31. Its mass, ellipticity, and location in the outer halo make it a compelling candidate for a former nucl…
Resolved galactic superwinds reconstructed around their host galaxies at z>3
Mandy C. Chen, Hsiao-Wen Chen, Max Gronke +2
This paper presents a detailed analysis of two giant Lyman-alpha (Lya) arcs detected near known galaxies at z=3.038 and z=3.754 lensed by the massive cluster MACS 1206 (z=0.44). Th…
An extended halo around an ancient dwarf galaxy
Anirudh Chiti, Anna Frebel, Joshua D. Simon +7
The Milky Way is surrounded by dozens of ultra-faint (< solar luminosities) dwarf satellite galaxies. They are the surviving remnants of the earliest galaxies, as confirmed…