Results 51 to 60 of about 13,860 (288)

A tale of two populations: surviving and destroyed dwarf galaxies and the build-up of the Milky Way’s stellar halo [PDF]

Monthly notices of the Royal Astronomical Society, 2020
We use magnetohydrodynamical simulations of Milky Way-mass haloes from the Auriga project to investigate the properties of surviving and destroyed dwarf galaxies that are accreted by these haloes over cosmic time.
Azadeh Fattahi, A. Deason, C. Frenk, C. Simpson, F. Gómez, R. Grand, A. Monachesi, F. Marinacci, R. Pakmor   +8 more
semanticscholar   +1 more source

The Metal-weak Milky Way Stellar Disk Hidden in the Gaia–Sausage–Enceladus Debris: The APOGEE DR17 View

The Astrophysical Journal, 2023
We have for the first time identified the early stellar disk in the Milky Way by using a combination of elemental abundances and kinematics. Using data from APOGEE DR17 and Gaia we select stars in the Mg–Mn–Al–Fe plane with elemental abundances ...
Sofia Feltzing, Diane Feuillet
doaj   +1 more source

Chemically characterising the Milky Way’s stellar halo

Proceedings of the International Astronomical Union, 2022
AbstractGalactic haloes in a Λ-CDM universe are predicted to host today a swarm of debris resulting from cannibalised dwarf galaxies. The chemo-dynamical information recorded in their stellar populations helps elucidate their nature, constraining the assembly history of the Galaxy.
Horta, D, Schiavon, RP, Apogee Team
openaire   +1 more source

The origin of accreted stellar halo populations in the Milky Way using APOGEE,Gaia, and the EAGLE simulations [PDF]

Monthly notices of the Royal Astronomical Society, 2018
Recent work indicates that the nearby Galactic halo is dominated by the debris from a major accretion event. We confirm that result from an analysis of APOGEE-DR14 element abundances and $\textit{Gaia}$-DR2 kinematics of halo stars.
J. Mackereth, R. Schiavon, J. Pfeffer, C. Hayes, J. Bovy, B. Anguiano, C. A. Prieto, C. A. Prieto, S. Hasselquist, J. Holtzman, Jennifer A. Johnson, S. Majewski, R. O’Connell, M. Shetrone, P. Tissera, J. Fernández-Trincado, J. Fernández-Trincado, J. Fernández-Trincado   +17 more
semanticscholar   +1 more source

Exploring the Milky Way stellar disk - A detailed elemental abundance study of 714 F and G dwarf stars in the solar neighbourhood [PDF]

, 2013
Aims. The aim of this paper is to explore and map the age and abundance structure of the stars in the nearby Galactic disk. Methods. We have conducted a high-resolution spectroscopic study of 714 F and G dwarf and subgiant stars in the Solar ...
T. Bensby, S. Feltzing, M. Observatory, Sweden., D. O. Astronomy, U. Michigan   +5 more
semanticscholar   +1 more source

ELVES. IV. The Satellite Stellar-to-halo Mass Relation Beyond the Milky Way

Astrophysical Journal, 2023
Quantifying the connection between galaxies and their host dark matter halos has been key for testing cosmological models on various scales. Below M ⋆ ∼ 109 M ⊙, such studies have primarily relied on the satellite galaxy population orbiting the Milky Way
S. Danieli, J. Greene, S. Carlsten, F. Jiang, R. Beaton, A. Goulding   +5 more
semanticscholar   +1 more source

Stellar Over-Densities in the Outer Halo of the Milky Way [PDF]

Publications of the Astronomical Society of Australia, 2010
AbstractThis study presents a tomographic survey of a subset of the outer halo (10–40 kpc) drawn from the Sloan Digital Sky Survey Data Release 6. Halo substructure on spatial scales of >3 degrees is revealed as an excess in the local density of sub-giant stars.
openaire   +3 more sources

Formation ofin situstellar haloes in Milky Way-mass galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
We study the formation of stellar haloes in three Milky Way-mass galaxies using cosmological smoothed particle hydrodynamics simulations, focusing on the subset of halo stars that form in situ, as opposed to those accreted from satellites. In situ stars in our simulations dominate the stellar halo out to 20 kpc and account for 30-40 per cent of its ...
Cooper, Andrew P., Parry, Owen H., Lowing, Ben, Cole, Shaun, Frenk, Carlos   +4 more
openaire   +3 more sources

The stellar halo in the inner Milky Way: predicted shape and kinematics [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2016
Abstract We have used N-body simulations for the Milky Way to investigate the kinematic and structural properties of the old metal-poor stellar halo in the barred inner region of the Galaxy. We find that the extrapolation of the density distribution for bulge RR Lyrae stars, ρ ∼ r−3, approximately matches the number density of RR Lyrae ...
Pérez-Villegas, A., Portail, M., Gerhard, O.   +2 more
openaire   +3 more sources

The Stellar Halo of the Galaxy is Tilted and Doubly Broken

The Astronomical Journal, 2022
Modern Galactic surveys have revealed an ancient merger that dominates the stellar halo of our galaxy (Gaia–Sausage–Enceladus, GSE). Using chemical abundances and kinematics from the H3 Survey, we identify 5559 halo stars from this merger in the radial ...
Jiwon Jesse Han, Charlie Conroy, Benjamin D. Johnson, Joshua S. Speagle, Ana Bonaca, Vedant Chandra, Rohan P. Naidu, Yuan-Sen Ting, Rebecca Woody, Dennis Zaritsky   +9 more
doaj   +1 more source