Results 61 to 70 of about 8,688,256 (155)

Main-sequence Turnoff Stars as Probes of the Ancient Galactic Relic: Chemo-dynamical Analysis of a Pilot Sample

The Astrophysical Journal
The main-sequence turnoff (MSTO) stars well preserve the chemical properties where they were born, making them ideal tracers for studying the stellar population. We perform a detailed chemo-dynamical analysis on moderately metal-poor (−2.0 
Renjing Xie, Haining Li, Ruizhi Zhang, Yin Wu, Xiang-Xiang Xue, Gang Zhao, Shi-Lin Zhang, Xiao-Jin Xie   +7 more
doaj   +1 more source

Disentangling the Distant Stellar Halo Using K Giants in DESI Year 3 Data

The Astrophysical Journal
We present a sample of 88,959 K giants from Dark Energy Spectroscopic Instrument Milky Way Survey Year 3 data, which we use to characterize the chemo-dynamical properties of the stellar halo at Galactocentric distances of 12 to ∼100 kpc.
Namitha Kizhuprakkat, Andrew P. Cooper, Wenting Wang, Amanda Byström, Joan Najita, Sergey E. Koposov, Guillaume Thomas, Songting Li, Ruizhi Zhang, Carlos Allende Prieto, Mika Lambert, Oleg Y. Gnedin, Alexander H. Riley, Jessica N. Aguilar, Steven Ahlen, Davide Bianchi, David Brooks, Todd Claybaugh, Axel de la Macorra, Peter Doel, Enrique Gaztañaga, Satya Gontcho A Gontcho, Gaston Gutierrez, Dick Joyce, Robert Kehoe, Theodore Kisner, Anthony Kremin, Martin Landriau, Laurent Le Guillou, Marc Manera, Aaron Meisner, Ramon Miquel, Will Percival, Francisco Prada, Ignasi Pérez-Ràfols, Graziano Rossi, Eusebio Sanchez, David Schlegel, Michael Schubnell, Ray Sharples, Joseph H. Silber, David Sprayberry, Gregory Tarlé, Benjamin A. Weaver, Hu Zou   +44 more
doaj   +1 more source

Milky Way Dairies

, 1951
Three unidentified executives stand outside the Milky Way Building.
Douglass, Neal
core  

Milky Way mass profile

, 2020
Python code that implements the dark matter halo contraction given in Cautun et al (2020) and the best fitting Milky Way mass profile given the latest Gaia DR2 rotation curve of our ...
Thomas M. Callingham, Marius Cautun
core   +1 more source

The Extremely Metal-rich Knot of Stars at the Heart of the Galaxy

The Astrophysical Journal
We show with Gaia XP spectroscopy that extremely metal-rich (EMR) stars in the Milky Way ([M/H] _XP ≳ 0.5) are largely confined to a tight “knot” at the center of the Galaxy. This EMR knot is round in projection, has a fairly abrupt edge near R _GC,proj ∼
Hans-Walter Rix, Vedant Chandra, Gail Zasowski, Annalisa Pillepich, Sergey Khoperskov, Sofia Feltzing, Rosemary F. G. Wyse, Neige Frankel, Danny Horta, Juna Kollmeier, Keivan Stassun, Melissa K. Ness, Jonathan C. Bird, David Nidever, José G. Fernández-Trincado, João A. S. Amarante, Chervin F. P. Laporte, Jianhui Lian   +17 more
doaj   +1 more source

Dynamics and history of the Milky Way

Our understanding of the Milky Way and its constituents is undergoing a revolutionary change driven primarily by the Gaia space mission, and which is further reinforced when combined with spectroscopic surveys from the ground.
Helmi, Amina
core  

Measuring the Milky Way Vertical Potential with the Phase Snail in a Model-independent Way

The Astrophysical Journal
The vertical phase-space spiral (snail) is a direct sign of disequilibrium of the Milky Way’s disk. Nevertheless, the wrapping of the phase snail contains information on the vertical potential.
Rui Guo, Zhao-Yu Li, Juntai Shen, Shude Mao, Chao Liu   +4 more
doaj   +1 more source

Decoding the Galactic Twirl: The Downfall of Milky Way–Mass Galaxy Rotation Curves in the FIRE Simulations

The Astrophysical Journal
Recent measurements of the Milky Way rotation curve found a sharp decline at around 15–20 kpc from the center of the Galaxy, suggesting that the Galactic dark matter halo is much less massive than predicted by other dynamical tracers.
Xiaowei Ou, Lina Necib, Andrew Wetzel, Anna Frebel, Jeremy Bailin, Micah Oeur   +5 more
doaj   +1 more source

The Milky Way Model

, 2008
In this article, I describe constructing a scale model of our galaxy—the Milky Way—and using this model to teach modern astronomy. The Milky Way model expands on concepts usually explored in the more common solar system model.
Friedman, Robert B.
core  

Milky Way versus Andromeda: a tale of two disks

, 2009
Aims. We study the chemical evolution of the disks of the Milky Way (MW) and of Andromeda (M31), to identify the common properties and differences between the two major galaxies of the Local ...
J. L. Hou, S. Boissier, N. Prantzos, Prantzos, N., R. X. Chang, Yin, J., Hou, J. L., S. Y. Shen, Chang, R. X., B. Zhang, Boissier, S., Zhang, B., Shen, S. Y., J. Yin   +13 more
core   +1 more source