Results 11 to 20 of about 13,860 (288)
Two stellar components in the halo of the Milky Way [PDF]
Nature, 2007 Two stand-alone files in manuscript, concatenated together. The first is for the main paper, the second for supplementary information.
Daniela Carollo +2 more
exaly +5 more sources
The dual nature of the Milky Way stellar halo [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractThe theory of the Milky Way formation, in the framework of the ΛCDM model, predicts galactic stellar halos to be built from multiple accretion events starting from the first structure to collapse in the Universe.Evidences in the past few decades have indicated that the Galactic halo consists of two overlapping structural components, an inner ...
Curir, Anna +3 more
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Rotational signature of the Milky Way stellar halo [PDF]
Monthly Notices of the Royal Astronomical Society, 2013 We measure the rotation of the Milky Way stellar halo on two samples of Blue Horizontal Branch (BHB) field halo stars from the Sloan Digital Sky Survey (SDSS) with four different methods. The two samples comprise 1582 and 2563 stars respectively and reach out to ~50 kpc in galactocentric distance. Two of the methods to measure rotation rely exclusively
Fermani, Francesco, Schönrich, Ralph
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Cosmological insights into the assembly of the radial and compact stellar halo of the Milky Way [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 Recent studies using Gaia DR2 have identified a massive merger in the early history of the Milky Way (MW) whose debris is dominated by radial and counterrotating orbits.
Laura V Sales +2 more
exaly +2 more sources
The Accretion Origin of the Milky Way’s Stellar Halo [PDF]
Astrophysical Journal, 2008 Submitted to the Astrophysical Journal.
Eric F Bell +2 more
exaly +4 more sources
Reliability of the Measured Velocity Anisotropy of the Milky Way Stellar Halo [PDF]
The Astrophysical Journal, 2017 Abstract Determining the velocity distribution of halo stars is essential for estimating the mass of the Milky Way and for inferring its formation history. Since the stellar halo is a dynamically hot system, the velocity distribution of halo stars is well described by the three-dimensional velocity dispersions
Kohei Hattori +3 more
openaire +4 more sources
In Disguise or Out of Reach: First Clues about In Situ and Accreted Stars in the Stellar Halo of the Milky Way from Gaia DR2 [PDF]
Astrophysical Journal, 2018 We investigate the nature of the double color–magnitude sequence observed in the Gaia DR2 HR diagram of stars with high transverse velocities. The stars in the reddest-color sequence are likely dominated by the dynamically hot tail of the thick disk ...
M Haywood +2 more
exaly +2 more sources
The Nature of the Milky Way’s Stellar Halo Revealed by the Three Integrals of Motion [PDF]
The Astrophysical Journal, 2021 Abstract We developed a new selection method of halo stars in the phase-space distribution defined by the three integrals of motion in an axisymmetric Galactic potential (E, L z , I 3), where I 3 is the third integral of motion.
Daniela Carollo, Masashi Chiba
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Mapping the Milky Way with LAMOST – II. The stellar halo [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 The radial number density and flattening of the Milky Way's stellar halo is measured with $\mathrm{5351}$ metal-poor ([Fe/H]$
Yan Xu +11 more
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Discovery of a New Stellar Subpopulation Residing in the (Inner) Stellar Halo of the Milky Way [PDF]
The Astrophysical Journal Letters, 2019 Abstract We report the discovery of a unique collection of metal-poor giant stars that exhibit anomalously high levels of 28Si, clearly above typical Galactic levels. Our sample spans a narrow range of metallicities, peaking at −1.07 ± 0.06, and exhibits abundance ratios of [Si, Al/Fe] that are as extreme as those observed in Galactic ...
Fernández-Trincado, José +10 more
openaire +6 more sources