Results 71 to 80 of about 267,615 (357)
Tracing the formation of the Milky Way through ultra metal-poor stars [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We use Gaia DR2 astrometric and photometric data, published radial velocities and MESA models to infer distances, orbits, surface gravities, and effective temperatures for all ultra metal-poor stars ([Fe/H] 11 Gyr) and that they are expected to belong to
F. Sestito +13 more
semanticscholar +1 more source
The formation and early evolution of the Milky Way [PDF]
Symposium - International Astronomical Union, 1985 In broad outline, the traditional picture for the formation of the Milky Way can be summarized as follows. The proto-galaxy consisted of a slowly rotating cloud of metal-free gas that cooled by bremsstrahlung and recombination radiation. As the internal pressure of the gas decreased, it collapsed in stages with smaller dimensions, faster rotation ...
openaire +2 more sources
Very Metal-poor Stars in the Solar Vicinity: Kinematics and Abundance Analysis
The Astrophysical Journal, 2023 Very metal-poor stars contain crucial information on the Milky Way’s infancy. In our previous study we derived a mean age of ∼13.7 Gyr for a sample of these stars in the Sun’s vicinity.
Anastasiia Plotnikova +3 more
doaj +1 more source
The origin of the Milky Way globular clusters [PDF]
, 2016 We present a cosmological zoom-in simulation of a Milky Way-like galaxy used to explore the formation and evolution of star clusters. We investigate in particular the origin of the bimodality observed in the colour and metallicity of globular clusters ...
Agertz, Oscar +2 more
core +2 more sources
The effects of cosmic rays on the formation of Milky Way-mass galaxies in a cosmological context [PDF]
, 2019 We investigate the impact of cosmic rays (CR) and different modes of CR transport on the properties of Milky Way-mass galaxies in cosmological magneto-hydrodynamical simulations in the context of the AURIGA project. We systematically study how advection,
T. Buck +4 more
semanticscholar +1 more source
High-Mass Star and Massive Cluster Formation in the Milky Way [PDF]
Annual Review of Astronomy and Astrophysics, 2017 This review examines the state-of-the-art knowledge of high-mass star and massive cluster formation, gained from ambitious observational surveys, which acknowledges the multiscale characteristics of these processes.
F. Motte, S. Bontemps, F. Louvet
semanticscholar +1 more source
, 2007 The Milky Way is the only galaxy for which we can resolve individual stars at all evolutionary phases, from the Galactic center to the outskirt. The last decade, thanks to the advent of near IR detectors and 8 meter class telescopes, has seen a great ...
Alard +15 more
core +1 more source
Abundance matching with the mean star formation rate: there is no missing satellites problem in the Milky Way above M200 ∼ 109 M⊙ [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We introduce a novel abundance matching technique that produces a more accurate estimate of the pre-infall halo mass, M200, for satellite galaxies. To achieve this, we abundance match with the mean star formation rate, averaged over the time when a ...
J. Read, D. Erkal
semanticscholar +1 more source
Untangling the Galaxy. I. Local Structure and Star Formation History of the Milky Way [PDF]
Astronomical Journal, 2019 Gaia DR2 provides unprecedented precision in measurements of the distance and kinematics of stars in the solar neighborhood. Through applying unsupervised machine learning on DR2's 5D data set (3D position + 2D velocity), we identify a number of clusters,
M. Kounkel, K. Covey
semanticscholar +1 more source
The metallicity distribution of the halo and the satellites of the Milky way in the hierarchical merging paradigm [PDF]
, 2008 To account for the observed differential metallicity distribution (DMD) of the Milky Way halo, a semi-analytical model is presented in the framework of the hierarchical merging paradigm for structure formation.
Bekki +36 more
core +1 more source