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The Clouds are breaking: tracing the Magellanic system with Gaia DR1 Mira variables (2017)
Journal Article
Deason, A., Belokurov, V., Erkal, D., Koposov, S., & Mackey, D. (2017). The Clouds are breaking: tracing the Magellanic system with Gaia DR1 Mira variables. Monthly Notices of the Royal Astronomical Society, 467(3), 2636-2647. https://doi.org/10.1093/mnras/stx263

We exploit the first data release from the Gaia mission to identify candidate Mira variables in the outskirts of the Magellanic Clouds. The repeated observations of sources during the initial phase of the Gaia mission is used to identify stars that s... Read More about The Clouds are breaking: tracing the Magellanic system with Gaia DR1 Mira variables.

Clouds, Streams and Bridges. Redrawing the blueprint of the Magellanic System with Gaia DR1 (2016)
Journal Article
Belokurov, V., Erkal, D., Deason, A., Koposov, S., De Angeli, F., Wyn Evans, D., …Mackey, D. (2016). Clouds, Streams and Bridges. Redrawing the blueprint of the Magellanic System with Gaia DR1. Monthly Notices of the Royal Astronomical Society, 466(4), 4711-4730. https://doi.org/10.1093/mnras/stw3357

We present the discovery of stellar tidal tails around the Large and the Small Magellanic Clouds (LMC and SMC, respectively) in the Gaia DR1 data. In between the Clouds, their tidal arms are stretched towards each other to form an almost continuous s... Read More about Clouds, Streams and Bridges. Redrawing the blueprint of the Magellanic System with Gaia DR1.

The Eating Habits of Milky Way-mass Halos: Destroyed Dwarf Satellites and the Metallicity Distribution of Accreted Stars (2016)
Journal Article
Deason, A., Mao, Y., & Wechsler, R. (2016). The Eating Habits of Milky Way-mass Halos: Destroyed Dwarf Satellites and the Metallicity Distribution of Accreted Stars. Astrophysical Journal, 821(1), Article 5. https://doi.org/10.3847/0004-637x/821/1/5

We study the mass spectrum of destroyed dwarfs that contribute to the accreted stellar mass of Milky Way (MW) mass M_vir ~ 10^12.1 M_sun) halos using a suite of 45 zoom-in, dissipationless simulations. Empirical models are employed to relate (peak) s... Read More about The Eating Habits of Milky Way-mass Halos: Destroyed Dwarf Satellites and the Metallicity Distribution of Accreted Stars.

Isotropic at the Break? 3D Kinematics of Milky Way Halo Stars in the Foreground of M31 (2016)
Journal Article
Cunningham, E., Deason, A., Guhathakurta, P., Rockosi, C., van der Marel, R., Toloba, E., …Dorman, C. (2016). Isotropic at the Break? 3D Kinematics of Milky Way Halo Stars in the Foreground of M31. Astrophysical Journal, 820(1), Article 18. https://doi.org/10.3847/0004-637x/820/1/18

We present the line-of-sight (LOS) velocities for 13 distant main sequence Milky Way halo stars with published proper motions. The proper motions were measured using long baseline (5-7 years) multi-epoch HST/ACS photometry, and the LOS velocities wer... Read More about Isotropic at the Break? 3D Kinematics of Milky Way Halo Stars in the Foreground of M31.

Satellites of LMC-mass dwarfs: close friendships ruined by Milky Way mass haloes (2015)
Journal Article
Deason, A., Wetzel, A., Garrison-Kimmel, S., & Belokurov, V. (2015). Satellites of LMC-mass dwarfs: close friendships ruined by Milky Way mass haloes. Monthly Notices of the Royal Astronomical Society, 453(4), 3568-3574. https://doi.org/10.1093/mnras/stv1939

Motivated by the recent discovery of several dwarfs near the Large Magellanic Cloud (LMC), we study the accretion of massive satellites onto Milky Way (MW)/M31-like haloes using the ELVIS suite of N-body simulations. We identify 25 surviving LMC-mass... Read More about Satellites of LMC-mass dwarfs: close friendships ruined by Milky Way mass haloes.

Satellite Dwarf Galaxies in a Hierarchical Universe: Infall Histories, Group Preprocessing, and Reionization (2015)
Journal Article
Wetzel, A., Deason, A., & Garrison-Kimmel, S. (2015). Satellite Dwarf Galaxies in a Hierarchical Universe: Infall Histories, Group Preprocessing, and Reionization. Astrophysical Journal, 807(1), Article 49. https://doi.org/10.1088/0004-637x/807/1/49

In the Local Group (LG), almost all satellite dwarf galaxies that are within the virial radius of the Milky Way (MW) and Andromeda (M31) exhibit strong environmental influence. The orbital histories of these satellites provide the key to understandin... Read More about Satellite Dwarf Galaxies in a Hierarchical Universe: Infall Histories, Group Preprocessing, and Reionization.

The progenitors of the Milky Way stellar halo: big bricks favoured over little bricks (2015)
Journal Article
Deason, A., Belokurov, V., & Weisz, D. (2015). The progenitors of the Milky Way stellar halo: big bricks favoured over little bricks. Monthly Notices of the Royal Astronomical Society: Letters, 448(1), L77-L81. https://doi.org/10.1093/mnrasl/slv001

We present a census of blue horizontal branch (BHB) and blue straggler (BS) stars belonging to dwarf galaxies and globular clusters, and compare these counts to that of the Milky Way stellar halo. We find, in agreement with earlier studies, that the... Read More about The progenitors of the Milky Way stellar halo: big bricks favoured over little bricks.

TriAnd and its siblings: satellites of satellites in the Milky Way halo (2014)
Journal Article
Deason, A., Belokurov, V., Hamren, K., Koposov, S., Gilbert, K., Beaton, R., …Cunningham, E. (2014). TriAnd and its siblings: satellites of satellites in the Milky Way halo. Monthly Notices of the Royal Astronomical Society, 444(4), 3975-3985. https://doi.org/10.1093/mnras/stu1764

We explore the Triangulum–Andromeda (TriAnd) overdensity in the SPLASH (Spectroscopic and Photometric Landscape of Andromeda's Stellar Halo) and SEGUE (the Sloan Extension for Galactic Understanding and Exploration) spectroscopic surveys. Milky Way m... Read More about TriAnd and its siblings: satellites of satellites in the Milky Way halo.

The cold veil of the Milky Way stellar halo (2012)
Journal Article
Deason, A., Belokurov, V., Evans, N., Koposov, S., Cooke, R., Peñarrubia, J., …Olszewski, E. (2012). The cold veil of the Milky Way stellar halo. Monthly Notices of the Royal Astronomical Society, 425(4), 2840-2853. https://doi.org/10.1111/j.1365-2966.2012.21639.x

We build a sample of distant (D > 80 kpc) stellar halo stars with measured radial velocities. Faint (20 < g < 22) candidate blue horizontal branch (BHB) stars were selected using the deep, but wide, multi-epoch Sloan Digital Sky Survey photometry. Fo... Read More about The cold veil of the Milky Way stellar halo.