Results 11 to 20 of about 5,023,389 (339)

Overview of the DESI Milky Way Survey [PDF]

open access: yesThe Astrophysical Journal, 2023
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.
Andrew P. Cooper   +64 more
doaj   +2 more sources

Detection of the Milky Way reflex motion due to the Large Magellanic Cloud infall [PDF]

open access: yesNature Astronomy, 2020
The Large Magellanic Cloud is the most massive satellite galaxy of the Milky Way, with an estimated mass exceeding a tenth of the mass of the Milky Way. Just past its closest approach of about 50 kpc, and flying by the Milky Way at an astonishing speed of 327 km/s, the Large Magellanic Cloud can affect our Galaxy in a number of ways, including ...
M. Petersen, J. Peñarrubia
arxiv   +2 more sources

Reverse engineering the Milky Way [PDF]

open access: yesMonthly notices of the Royal Astronomical Society, 2020
The ages, metallicities, alpha-elements and integrals of motion of globular clusters (GCs) accreted by the Milky Way from disrupted satellites remain largely unchanged over time. Here we have used these conserved properties in combination to assign 76 GCs to 5 progenitor satellite galaxies -- one of which we dub the Koala dwarf galaxy.
D. Forbes
arxiv   +3 more sources

The Coherent Magnetic Field of the Milky Way [PDF]

open access: yesAstrophysical Journal, 2023
We present a suite of models of the coherent magnetic field of the Galaxy (GMF) based on new divergence-free parametric functions describing the global structure of the field.
M. Unger, Glennys R. Farrar
semanticscholar   +1 more source

First Sagittarius A* Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole in the Center of the Milky Way [PDF]

open access: yes, 2023
We present the first Event Horizon Telescope (EHT) observations of Sagittarius A* (Sgr A$^*$), the Galactic center source associated with a supermassive black hole.
K. Akiyama   +387 more
semanticscholar   +1 more source

A time-resolved picture of our Milky Way’s early formation history [PDF]

open access: yesNature, 2022
The formation of our Milky Way can be split up qualitatively into different phases that resulted in its structurally different stellar populations: the halo and the disk components1–3.
M. Xiang, H. Rix
semanticscholar   +1 more source

The Poor Old Heart of the Milky Way [PDF]

open access: yesAstrophysical Journal, 2022
Our Milky Way should host an ancient, metal-poor, and centrally concentrated stellar population, which reflects the star formation and enrichment in the few most massive progenitors that coalesced at high redshift to form the proto-Galaxy.
H. Rix   +11 more
semanticscholar   +1 more source

Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with ΛCDM [PDF]

open access: yes, 2020
We present an expanded sample of 75 Milky Way Cepheids with Hubble Space Telescope (HST) photometry and Gaia EDR3 parallaxes, which we use to recalibrate the extragalactic distance ladder and refine the determination of the Hubble constant.
A. Riess   +6 more
semanticscholar   +1 more source

Reconstructing the Last Major Merger of the Milky Way with the H3 Survey [PDF]

open access: yesAstrophysical Journal, 2021
Several lines of evidence suggest that the Milky Way underwent a major merger at z ∼ 2 with the Gaia-Sausage-Enceladus (GSE) galaxy. Here we use H3 Survey data to argue that GSE entered the Galaxy on a retrograde orbit based on a population of highly ...
R. Naidu   +10 more
semanticscholar   +1 more source

The effect of the deforming dark matter haloes of the Milky Way and the Large Magellanic Cloud on the Orphan-Chenab stream [PDF]

open access: yes, 2022
It has recently been shown that the Large Magellanic Cloud (LMC) has a substantial effect on the Milky Way’s stellar halo and stellar streams. Here, we explore how deformations of the Milky Way and LMC’s dark matter haloes affect stellar streams, and ...
Sophia Lilleengen   +15 more
semanticscholar   +1 more source

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