Andreia Carrillo
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View article: From order to chaos: the blurred out metallicity gradient of the Gaia-Enceladus/Sausage progenitor
From order to chaos: the blurred out metallicity gradient of the Gaia-Enceladus/Sausage progenitor Open
The powerful combination of Gaia with other Milky Way large survey data has ushered in a deeper understanding of the assembly history of our Galaxy, which is marked by the accretion of Gaia-Enceladus/Sausage (GES). As a step towards recons…
View article: Exploring the interaction between the MW and LMC with a large sample of blue horizontal branch stars from the DESI survey
Exploring the interaction between the MW and LMC with a large sample of blue horizontal branch stars from the DESI survey Open
The Large Magellanic Cloud (LMC) is a Milky Way (MW) satellite that is massive enough to gravitationally attract the MW disc and inner halo, causing significant motion of the inner MW with respect to the outer halo. In this work, we probe …
View article: Nearby stellar substructures in the Galactic halo from DESI Milky Way Survey Year 1 Data Release
Nearby stellar substructures in the Galactic halo from DESI Milky Way Survey Year 1 Data Release Open
We report five nearby ($d_{\mathrm{helio}} < 5$ kpc) stellar substructures in the Galactic halo from a subset of 138 661 stars in the Dark Energy Spectroscopic Instrument (DESI) Milky Way Survey Year 1 Data Release. With an unsupervised…
View article: The Cocytos Stream: A Disrupted Globular Cluster from our Last Major Merger?
The Cocytos Stream: A Disrupted Globular Cluster from our Last Major Merger? Open
The census of stellar streams and dwarf galaxies in the Milky Way provides direct constraints on galaxy formation models and the nature of dark matter. The DESI Milky Way survey (with a footprint of 14,000$~deg{^2}$ and a depth of $r<19$ m…
View article: DESI Early Data Release Milky Way Survey value-added catalogue
DESI Early Data Release Milky Way Survey value-added catalogue Open
We present the stellar value-added catalogue based on the Dark Energy Spectroscopic Instrument (DESI) Early Data Release. The catalogue contains radial velocity and stellar parameter measurements for $\simeq$ 400 000 unique stars observed …
View article: DESI Early Data Release Milky Way Survey Value-Added Catalogue
DESI Early Data Release Milky Way Survey Value-Added Catalogue Open
We present the stellar value-added catalogue based on the Dark Energy Spectroscopic Instrument (DESI) Early Data Release. The catalogue contains radial velocity and stellar parameter measurements for $\simeq$ 400,000 unique stars observed …
View article: The frequency of metal enrichment of cool helium-atmosphere white dwarfs using the DESI early data release
The frequency of metal enrichment of cool helium-atmosphere white dwarfs using the DESI early data release Open
There is an overwhelming evidence that white dwarfs host planetary systems; revealed by the presence, disruption, and accretion of planetary bodies. A lower limit on the frequency of white dwarfs that host planetary material has been estim…
View article: The frequency of metal-enrichment of cool helium-atmosphere white dwarfs using the DESI Early Data Release
The frequency of metal-enrichment of cool helium-atmosphere white dwarfs using the DESI Early Data Release Open
There is overwhelming evidence that white dwarfs host planetary systems; revealed by the presence, disruption, and accretion of planetary bodies. A lower limit on the frequency of white dwarfs that host planetary material has been estimate…
View article: Can we really pick and choose? Benchmarking various selections of <i>Gaia</i> Enceladus/Sausage stars in observations with simulations
Can we really pick and choose? Benchmarking various selections of <i>Gaia</i> Enceladus/Sausage stars in observations with simulations Open
Large spectroscopic surveys plus Gaia astrometry have shown us that the inner stellar halo of the Galaxy is dominated by the debris of Gaia Enceladus/Sausage (GES). With the richness of data at hand, there are a myriad of ways these accret…
View article: The individual abundance distributions of disc stars across birth radii in GALAH
The individual abundance distributions of disc stars across birth radii in GALAH Open
Individual abundances in the Milky Way disc record stellar birth properties [e.g. age, birth radius (Rbirth)], and capture the diversity of the star-forming environments over time. Assuming an analytical relationship between ([Fe/H], [α/Fe…
View article: A giant planet candidate transiting a white dwarf
A giant planet candidate transiting a white dwarf Open
Astronomers have discovered thousands of planets outside the Solar System1, most of which orbit stars that will eventually evolve into red giants and then into white dwarfs. During the red giant phase, any close-orbiting planets will be en…
View article: The individual abundance distributions of disc stars across birth radii in GALAH
The individual abundance distributions of disc stars across birth radii in GALAH Open
Individual abundances in the Milky Way disc record stellar birth properties (e.g. age, birth radius ($R_{\rm birth}$)) and capture the diversity of the star-forming environments over time. Assuming an analytical relationship between ([Fe/H…
View article: NANCY: Next-generation All-sky Near-infrared Community surveY
NANCY: Next-generation All-sky Near-infrared Community surveY Open
The Nancy Grace Roman Space Telescope is capable of delivering an unprecedented all-sky, high-spatial resolution, multi-epoch infrared map to the astronomical community. This opportunity arises in the midst of numerous ground- and space-ba…
View article: Can we really pick and choose? Benchmarking various selections of Gaia Enceladus/Sausage stars in observations with simulations
Can we really pick and choose? Benchmarking various selections of Gaia Enceladus/Sausage stars in observations with simulations Open
Large spectroscopic surveys plus Gaia astrometry have shown us that the inner stellar halo of the Galaxy is dominated by the debris of Gaia Enceladus/Sausage (GES). With the richness of data at hand, there are a myriad of ways these accret…
View article: Overview of the DESI Milky Way Survey
Overview of the DESI Milky Way Survey Open
We describe the Milky Way Survey (MWS) that will be undertaken with the Dark Energy Spectroscopic Instrument (DESI) on the Mayall 4 m telescope at the Kitt Peak National Observatory. Over the next 5 yr DESI MWS will observe approximately s…
View article: The Relationship between Age, Metallicity, and Abundances for Disk Stars in a Simulated Milky Way
The Relationship between Age, Metallicity, and Abundances for Disk Stars in a Simulated Milky Way Open
Observations of the Milky Way’s low- α disk show that several element abundances correlate with age at fixed metallicity, with unique slopes and small scatters around the age–[X/Fe] relations. In this study, we turn to simulations to explo…
View article: The relationship between age, metallicity, and abundances for disk stars in a simulated Milky Way galaxy
The relationship between age, metallicity, and abundances for disk stars in a simulated Milky Way galaxy Open
Observations of the Milky Way's low-$α$ disk show that at fixed metallicity, [Fe/H], several element abundance, [X/Fe], correlate with age, with unique slopes and small scatters around the age-[X/Fe] relations. In this study, we turn to si…
View article: Snowmass2021 Cosmic Frontier White Paper: Prospects for obtaining Dark Matter Constraints with DESI
Snowmass2021 Cosmic Frontier White Paper: Prospects for obtaining Dark Matter Constraints with DESI Open
Despite efforts over several decades, direct-detection experiments have not yet led to the discovery of the dark matter (DM) particle. This has led to increasing interest in alternatives to the Lambda CDM (LCDM) paradigm and alternative DM…
View article: The detailed chemical abundance patterns of accreted halo stars from the optical to infrared
The detailed chemical abundance patterns of accreted halo stars from the optical to infrared Open
Understanding the assembly of our Galaxy requires us to also characterize the systems that helped build it. In this work, we accomplish this by exploring the chemistry of accreted halo stars from Gaia-Enceladus/Gaia-Sausage (GES) selected …
View article: The detailed chemical abundance patterns of accreted halo stars from the optical to infrared
The detailed chemical abundance patterns of accreted halo stars from the optical to infrared Open
Understanding the assembly of our Galaxy requires us to also characterize the systems that helped build it. In this work, we accomplish this by exploring the chemistry of accreted halo stars from the Gaia-Enceladus/Gaia-Sausage (GES) selec…
View article: The VIRUS-P Exploration of Nearby Galaxies (VENGA): the stellar populations and assembly of NGC 2903’s bulge, bar, and outer disc
The VIRUS-P Exploration of Nearby Galaxies (VENGA): the stellar populations and assembly of NGC 2903’s bulge, bar, and outer disc Open
We study the stellar populations and assembly of the nearby spiral galaxy NGC 2903’s bulge, bar, and outer disc using the VIRUS-P Exploration of Nearby Galaxies IFS survey. We observe NGC 2903 with a spatial resolution of 185 pc using the …
View article: Identical or fraternal twins? The chemical homogeneity of wide binaries from <i>Gaia</i> DR2
Identical or fraternal twins? The chemical homogeneity of wide binaries from <i>Gaia</i> DR2 Open
One of the high-level goals of Galactic archaeology is chemical tagging of stars across the Milky Way to piece together its assembly history. For this to work, stars born together must be uniquely chemically homogeneous. Wide binary system…
View article: Know thy star, know thy planet: chemo-kinematically characterizing <i>TESS</i> targets
Know thy star, know thy planet: chemo-kinematically characterizing <i>TESS</i> targets Open
The Transiting Exoplanet Survey Satellite (TESS) has already begun to discover what will ultimately be thousands of exoplanets around nearby cool bright stars. These potential host stars must be well understood to accurately characterize e…
View article: Know thy star, know thy planet: Chemo-kinematically characterizing TESS targets
Know thy star, know thy planet: Chemo-kinematically characterizing TESS targets Open
Catalog used for studying the chemo-kinematics of TESS host stars containing 2,218,434 rows and 72 columns.
View article: Know thy star, know thy planet: Chemo-kinematically characterizing TESS targets
Know thy star, know thy planet: Chemo-kinematically characterizing TESS targets Open
Catalog used for studying the chemo-kinematics of TESS host stars containing 2,218,434 rows and 72 columns.
View article: Characterizing dw1335-29, a recently discovered dwarf satellite of M83
Characterizing dw1335-29, a recently discovered dwarf satellite of M83 Open
The number, distribution, and properties of dwarf satellites are crucial probes of the physics of galaxy formation at low masses and the response of satellite galaxies to the tidal and gas dynamical effects of their more massive parent.To …
View article: Characterizing dw1335-29, a recently discovered dwarf satellite of M83
Characterizing dw1335-29, a recently discovered dwarf satellite of M83 Open
The number, distribution, and properties of dwarf satellites are crucial probes of the physics of galaxy formation at low masses and the response of satellite galaxies to the tidal and gas dynamical effects of their more massive parent.To …