Results 111 to 120 of about 200,659 (240)

Masses, luminosities and dynamics of galactic molecular clouds [PDF]

Star formation in galaxies takes place in molecular clouds and the Milky Way is the only galaxy in which it is possible to resolve and study the physical properties and star formation activity of individual clouds. The masses, luminosities, dynamics, and
Barrett, J. W., Mooney, T. J., Rivolo, A. R., Sage, L. J., Solomon, P. M.   +4 more
core   +1 more source

Synthetic Gaia DR3 Surveys from the FIRE Cosmological Simulations of Milky Way-mass Galaxies

The Astrophysical Journal
The third data release (DR3) of Gaia has provided a fivefold increase in the number of radial velocity measurements of stars, as well as a stark improvement in parallax and proper motion measurements.
Tri Nguyen, Xiaowei Ou, Nondh Panithanpaisal, Nora Shipp, Lina Necib, Robyn Sanderson, Andrew Wetzel   +6 more
doaj   +1 more source

Dynamical effects of the long bar in the Milky Way

, 2008
5 pages, 3 figures. To appear in the online proceedings of IAU symposium 254 - The Galaxy Disk in Cosmological Context. Uses iaus.cls.
Gardner, Esko, Innanen, Kimmo A., Flynn, Chris   +2 more
openaire   +2 more sources

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

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

Enlighten the dark in the Milky Way with dynamical models

, 2015
Since the first studies of galactic rotation curves we have seen evidence of a dark mass component in the halos of galaxies we can not observe directly. As the motion of astronomical objects are sensitive to the underlying gravitational potential, we can use dynamical models to infer the distribution of dark matter in galaxies including the Milky Way ...
openaire   +3 more sources

The Influence of the Bar on the Dynamics of Globular Clusters in the Central Region of the Milky Way. Frequency Analysis of Orbits According to Gaia EDR3 Data [PDF]

, 2023
A. T. Bajkova, Anton A Smirnov, В. В. Бобылев   +2 more
openalex   +3 more sources

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

The Chemo-Dynamical History of the Milky Way as Revealed by SDSS/SEGUE [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractAlthough originally conceived as primarily an extragalactic survey, the Sloan Digital Sky Survey (SDSS-I), and its extensions SDSS-II and SDSS-III, continue to have a major impact on our understanding of the formation and evolution of our host galaxy, the Milky Way.
openaire   +3 more sources

The Chemo-Dynamical Evolution Of The Milky Way Disc

, 2016
The kinematic properties of the stellar subpopulations in the Milky Way disc are linked to their radial and vertical scale lengths. On the other hand, element abundances and abundance ratios are a signature of the evolution history of the stellar components.
openaire   +2 more sources