Results 121 to 130 of about 200,659 (240)

Accurate, Precise, and Physically Self-consistent Ages and Metallicities for 400,000 Solar Neighborhood Subgiant Branch Stars

The Astrophysical Journal
Age is the most difficult fundamental stellar parameter to infer for isolated stars. While isochrone-based ages are in general imprecise for both main-sequence dwarfs and red giants, precise isochrone-based ages can be obtained for stars on the subgiant ...
David M. Nataf, Kevin C. Schlaufman, Henrique Reggiani, Isabel Hahn   +3 more
doaj   +1 more source

Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. III. Dynamically Tagged Groups and Chemodynamical Properties

The Astrophysical Journal
Very metal-poor (VMP) stars record the signatures of early accreted galaxies, making them essential tools for unraveling the early stages of Galaxy formation.
Ruizhi Zhang, Tadafumi Matsuno, Haining Li, Wako Aoki, Xiang-Xiang Xue, Takuma Suda, Gang Zhao, Yuqin Chen, Miho N. Ishigaki, Jianrong Shi, Qianfan Xing, Jingkun Zhao   +11 more
doaj   +1 more source

Structure and dynamics of the Milky Way disk as revealed from the radial velocity distributions of APOGEE red clump stars [PDF]

, 2016
Daisuke Toyouchi, Masashi Chiba
openalex   +1 more source

Formation of the Two-armed Phase Spiral from Multiple External Perturbations

The Astrophysical Journal
Recent studies using the Gaia DR3 data have revealed a two-armed phase spiral in the Z – V _Z phase space in the inner disk. In this study, we present new features of the two-armed phase spiral revealed by the Gaia data and a new mechanism to explain ...
Junxian Lin, Zhao-Yu Li, Rui Guo, Jason A. S. Hunt, T. Antoja, Chengye Cao   +5 more
doaj   +1 more source

SALSA is an ICT based educational tool for Astrophysics students to study structure and dynamics of Milky Way Galaxy

, 2022
Mir Sakhawat Hossain
openalex   +1 more source

The Rotating Bulge and Halo in the Milky Way: Evidence of Angular Momentum Transferred from the Decelerating Bar

The Astrophysical Journal
Recent observations indicate that both the Milky Way bulge and inner halo exhibit angular momentum, although the origin and evolution of this prograde signature remain ambiguous.
Zhuohan Li, Chengdong Li, Gang Zhao, Ruizhi Zhang, Xiang-Xiang Xue   +4 more
doaj   +1 more source

Dynamical modelling of the Milky Way Bar/Bulge

, 2018
I review the recent progresses on the properties of the Galactic bar and bulge, and the major theoretical models and techniques to understand the Milky Way bulge. Despite these recent advances, a complete bulge formation model that explains the full kinematics and metallicity distribution is still not fully understood.
openaire   +2 more sources

He Awa Whiria: The Tidal Streams of Interstellar Objects

The Astrophysical Journal
Upcoming surveys are likely to discover a new sample of interstellar objects (ISOs) within the solar system, but questions remain about the origin and distribution of this population within the Galaxy.
John C. Forbes, Michele T. Bannister, Chris Lintott, Angus Forrest, Simon Portegies Zwart, Rosemary C. Dorsey, Leah Albrow, Matthew J. Hopkins   +7 more
doaj   +1 more source

Bar-driven Streaming Motions Mimic a Massive Bulge in the Inner Milky Way

The Astrophysical Journal
The circular speed curve of the Milky Way provides a key constraint on its mass distribution, reflecting the axisymmetric component of the gravitational potential.
Junichi Baba
doaj   +1 more source

The dynamic Milky Way in the Gaia era

The Milky Way is a relatively typical galaxy, and we are in the middle of it. That allows astronomers to observe an enormous amount of individual stars and their properties. With the success of the Gaia mission, the amount of catalogued stars is reaching into the billions.
openaire   +1 more source