Results 41 to 50 of about 155,710 (341)
Heavy element evolution in the inner regions of the Milky Way [PDF]
, 2020 We present results for the evolution of the abundances of heavy elements (O, Mg, Al, Si, K, Ca, Cr, Mn, Ni and Fe) in the inner Galactic regions ($R_{GC} < 4$kpc).
F. Matteucci +3 more
semanticscholar +1 more source
The Rapid Onset of Stellar Bars in the Baryon-dominated Centers of Disk Galaxies
The Astrophysical Journal, 2023 Recent observations of high-redshift galactic disks ( z ≈ 1–3) show a strong negative trend in the dark-matter (DM) fraction f _DM with increasing baryon surface density.
Joss Bland-Hawthorn +3 more
doaj +1 more source
Stellar migrations and metal flows – Chemical evolution of the thin disc of a simulated Milky Way analogous galaxy [PDF]
, 2020 This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, Volume 496, Issue 1, July 2020, Pages 80–94 ©: 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
F. Vincenzo, C. Kobayashi
semanticscholar +1 more source
Revisiting long-standing puzzles of the Milky Way: the Sun and its vicinity as typical outer disk chemical evolution [PDF]
Astronomy & Astrophysics, 2019 We present a scenario of the chemical enrichment of the solar neighborhood that solves the G-dwarf problem by taking into account constraints on a larger scale.
M. Haywood +4 more
semanticscholar +1 more source
On the chemical evolution of the Milky Way [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractI discuss three different topics concerning the chemical evolution of the Milky Way (MW). 1) The metallicity distribution of the MW halo; it is shown that this distribution can be analytically derived in the framework of the hierarchical merging scenario for galaxy formation, assuming that the component sub-haloes had chemical properties ...
openaire +3 more sources
The Imprint of Clump Formation at High Redshift. II. The Chemistry of the Bulge
The Astrophysical Journal, 2023 In Paper I, we showed that clumps in high-redshift galaxies, having a high star formation rate density (Σ _SFR ), produce disks with two tracks in the [Fe/H]–[ α /Fe] chemical space, similar to that of the Milky Way’s (MW’s) thin+thick disks.
Victor P. Debattista +13 more
doaj +1 more source
Rapid disc settling and the transition from bursty to steady star formation in Milky Way-mass galaxies [PDF]
Monthly notices of the Royal Astronomical Society, 2022 Recent observations and simulations indicate substantial evolution in the properties of galaxies with time, wherein rotationally-supported and steady thin discs (like those frequently observed in the local universe) emerge from galaxies that are clumpy,
Alex Gurvich +8 more
semanticscholar +1 more source
The Tilt of the Velocity Ellipsoid of Different Galactic Disk Populations
The Astrophysical Journal, 2023 The tilt of the velocity ellipsoid is a helpful tracer of the gravitational potential of the Milky Way. In this paper, we use nearly 140,000 red clump (RC) stars selected from LAMOST and Gaia to make a detailed analysis of the tilt of the velocity ...
Weixiang Sun, Han Shen, Xiaowei Liu
doaj +1 more source
The chemical evolution of barium and europium in the Milky Way [PDF]
Astronomy & Astrophysics, 2006 We compute the evolution of the abundances of barium and europium in the Milky Way and we compare our results with the observed abundances from the recent UVES Large Program "First Stars". We use a chemical evolution model which already reproduces the majority of observational constraints.
CESCUTTI G +4 more
openaire +6 more sources
The Astrophysical Journal, 2023 Orbital characteristics based on Gaia Early Data Release 3 astrometric parameters are analyzed for ∼1700 r -process-enhanced (RPE; [Eu/Fe] > +0.3) metal-poor stars ([Fe/H] ≤ −0.8) compiled from the R -Process Alliance, the GALactic Archaeology with ...
Derek Shank +10 more
doaj +1 more source