Results 61 to 70 of about 81,755 (239)
Chemodynamical evolution of the Milky Way disk - I. The solar vicinity [PDF]
, 2012 [Abridged] In this first paper of this series, we present a new approach for studying the chemo-dynamical evolution in disk galaxies, which consists of fusing disk chemical evolution models with compatible numerical simulations of galactic disks.
I. Minchev, C. Chiappini, M. Martig
semanticscholar +1 more source
The Flattening Metallicity Gradient in the Milky Way’s Thin Disk [PDF]
The Astrophysical Journal, 2021 Abstract We calculate the ages, orbits and phase-space coordinates for a sample of ∼4 million LAMOST and Gaia stars. The ages are cross-matched and compared with values from two other popular age catalogs, which derive the ages using different methods.
John J. Vickers, Juntai Shen, Zhao-Yu Li
openaire +3 more sources
Modelling the HI halo of the Milky Way [PDF]
, 2010 Aims: we studied the global distribution and kinematics of the extra-planar neutral gas in the Milky Way. Methods: we built 3D models for a series of Galactic HI layers, projected them for an inside view, and compared them with the Leiden-Argentina-Bonn ...
A. Marasco +58 more
core +2 more sources
METALLICITY GRADIENTS IN THE MILKY WAY DISK AS OBSERVED BY THE SEGUE SURVEY [PDF]
, 2011 The observed radial and vertical metallicity distribution of old stars in the Milky Way disk provides a powerful constraint on the chemical enrichment and dynamical history of the disk system.
Judy Y. Cheng +8 more
semanticscholar +1 more source
A Bayesian Approach to the Vertical Structure of the Disk of the Milky Way [PDF]
The Open Journal of Astrophysics, 2020 This work investigates the vertical profile of the stars in the disk of the Milky Way. The models investigated are of the form $sech^{2/n}(nz/(2H))$ where, setting $ = 2/n$, the three functions of the sequence $ = 0,1,2$ correspond to exponential, $sech$, $sech^2$ functions.
Phillip S. Dobbie, Stephen J. Warren
openaire +8 more sources
Disentangling Stellar Age Estimates from Galactic Chemodynamical Evolution
The Astrophysical Journal, 2023 Stellar ages are key for determining the formation history of the Milky Way, but are difficult to measure precisely. Furthermore, methods that use chemical abundances to infer ages may entangle the intrinsic evolution of stars with the chemodynamical ...
Jeff Shen +4 more
doaj +1 more source
Mapping the Northern Galactic Disk Warp with Classical Cepheids [PDF]
, 2019 We present an updated three dimensional map of the Milky Way based on a sample of 2431 classical Cepheid variable stars, supplemented with about 200 newly detected classical Cepheids from the OGLE survey.
Gromadzki, M. +13 more
core +2 more sources
Cold Dark Matter Substructure and Galactic Disks I: Morphological Signatures of Hierarchical Satellite Accretion [PDF]
, 2007 (Abridged) We conduct a series of high-resolution, dissipationless N-body simulations to investigate the cumulative effect of substructure mergers onto thin disk galaxies in the context of the LCDM paradigm of structure formation. Our simulation campaign
Bullock, James S. +4 more
core +3 more sources
Are disk galaxies the progenitors of giant ellipticals? [PDF]
, 2007 A popular formation scenario for giant elliptical galaxies proposes that they might have formed from binary mergers of disk galaxies. Difficulties with the scenario that emerged from earlier studies included providing the necessary stellar mass and ...
Barden +69 more
core +4 more sources
Substructure in CDM Halos and the Heating of Stellar Disks [PDF]
, 2001 Numerical simulations have revealed the presence of long-lived substructure in Cold Dark Matter (CDM) halos. These surviving cores of past merger and accretion events vastly outnumber the known satellites of the Milky Way.
Navarro, Julio F.
core +3 more sources