Results 41 to 50 of about 220,363 (170)
Mapping the Chemodynamics of the Galactic Disk Using the LAMOST and APOGEE Red Clump Stars
The Astrophysical Journal Supplement SeriesA detailed measurement is made of the metallicity distributions, kinematics, and dynamics of the thin and thick disks across a large disk volume (5.0 ≤ R ≤ 15.0 kpc and ∣ Z ∣ ≤ 3.0 kpc) by using the LAMOST–APOGEE red clump stars.
Weixiang Sun +3 more
doaj +1 more source
A Tale of Two Disks: Mapping the Milky Way with the Final Data Release of APOGEE
The Astrophysical Journal, 2023 We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), α -element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant stars from the final data release (DR17) of the Apache Point Observatory ...
Julie Imig +26 more
doaj +1 more source
A small slice of the Milky Way disk in SDSS [PDF]
arXiv, 2012 The present-day state of the Milky Way disk can tell us much about the history of our Galaxy and provide insights into its formation. We have constructed a high-precision catalogue of disk stars using data from the Sloan Digital Sky Survey (SDSS) and use these stars to probe the heating history as well as investigating the detailed phase-space ...
arxiv
Spurious Radial Migration from Relativistic Effects in the Milky-Way Disk [PDF]
arXiv, 2022 The gradient of the gravitational redshift in the potential of the Milky-Way induces an apparent spurious radial migration. I show that this effect is simply related to the local acceleration, which was measured recently by Gaia eDR3, implying a spectroscopic shift of $[-2.4x10^{-2}/(r/8kpc)] km/s/kpc.
arxiv
A Wave-corrected Assessment of the Local Midplane
The Astrophysical JournalAs the number of known Galactic structures mounts thanks to the Gaia Space Telescope, it is now pertinent to study methods for disentangling structures occupying the same regions of the Milky Way. Indeed, understanding the precise form of each individual
Ziyuan Yin, Austin Hinkel
doaj +1 more source
Role of Gaseous Disk in the Formation of the Spiral Structure of the Milky Way Galaxy
Open Astronomy, 2016 We use observational gaseous and stellar density distributions in the disk of the Milky Way (MW) galaxy together with the disk rotation curve and measured disk velocity dispersion to build collisionless and combined collisionless-gaseous equilibrium ...
Korchagin V. I. +2 more
doaj +1 more source
Observational Constraints of Radial Migration in the Galactic Disk Driven by the Slowing Bar
The Astrophysical Journal LettersRadial migration is an important dynamical effect that has reshaped the Galactic disk, but its origin has yet to be elucidated. In this work, we present evidence that resonant dragging by the corotation of a decelerating bar could be the main driver of ...
HanYuan Zhang +9 more
doaj +1 more source
Milky Way's Thick and Thin disk: Is there distinct thick disk? [PDF]
, 2016 This article is based on our discussion session on Milky Way models at the 592 WE-Heraeus Seminar, Reconstructing the Milky Way's History: Spectroscopic Surveys, Asteroseismology and Chemodynamical models. The discussion focused on the following question: "Are there distinct thick and thin disks?".
arxiv +1 more source
The Milky Way and other spiral galaxies
EPJ Web of Conferences, 2012 Cosmologists have often considered the Milky Way as a typical spiral galaxy, and its properties have considerably influenced the current scheme of galaxy formation.
Wang J.L. +5 more
doaj +1 more source
Structure and Evolution of the Milky Way [PDF]
, 2011 This review discusses the structure and evolution of the Milky Way, in the context of opportunities provided by asteroseismology of red giants. The review is structured according to the main Galactic components: the thin disk, thick disk, stellar halo, and the Galactic bar/bulge.
arxiv +1 more source