Results 41 to 50 of about 43,519 (315)
Chemistry of the Most Metal-poor Stars in the Bulge and the z > 10 Universe [PDF]
, 2014 Metal-poor stars in the Milky Way are local relics of the epoch of the first stars and the first galaxies. However, a low metallicity does not prove that a star formed in this ancient era, as metal-poor stars form over a range of redshift in different ...
Casey, Andrew R., Schlaufman, Kevin C.
core +2 more sources
On the Interpretation of the l-v Features in the Milky Way Galaxy [PDF]
, 2000 We model the gas dynamics of barred galaxies using a three-dimensional, high-resolution, $N$-body+hydrodynamical simulation and apply it to the Milky Way in an attempt to reproduce both the large-scale structure and the clumpy morphology observed in ...
Baba, Junichi +2 more
core +4 more sources
Stream Fanning and Bifurcations: Observable Signatures of Resonances in Stellar Stream Morphology
The Astrophysical Journal, 2023 Recent observations have revealed a trove of unexpected morphological features in many of the Milky Way’s stellar streams. Explanations for such features include time-dependent deformations of the Galactic gravitational potential, local disruptions ...
Tomer D. Yavetz +4 more
doaj +1 more source
On the Migration Origin of the Hercules Moving Group with GAIA, LAMOST, APOGEE, and GALAH Surveys
The Astrophysical Journal, 2023 Using Gaia DR3 data and the wavelet transformation technique, we study the substructures of the Hercules moving group (HMG): Hercules 1 (H1) and Hercules 2 (H2).
Xilong Liang +5 more
doaj +1 more source
Locally Cold Flows from Large-Scale Structure
, 2011 We show that the "cold" Hubble flow observed for galaxies around the Milky Way does not represent a problem in cosmology but is due to the particular geometry and dynamics of our local wall.
A. S. Szalay +40 more
core +1 more source
Advanced Materials Interfaces, EarlyView., 2023 This review discusses the use of Surface‐Enhanced Raman Spectroscopy (SERS) combined with Artificial Intelligence (AI) for detecting antimicrobial resistance (AMR). Various SERS studies used with AI techniques, including machine learning and deep learning, are analyzed for their advantages and limitations.
Zakarya Al‐Shaebi +4 more
wiley +1 more source
A Severe Challenge to the Modified Newtonian Dynamics Phenomenology in Our Galaxy
The Astrophysical Journal, 2023 Modified Newtonian dynamics (MOND) is one of the most popular alternative theories of dark matter to explain the missing mass problem in galaxies. Although it remains controversial regarding MOND as a fundamental theory, MOND phenomenology has been shown
Man Ho Chan, Ka Chung Law
doaj +1 more source
Dynamical Modeling of the Milky Way Bugle [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractBulges are commonly believed to form in the dynamical violence of galaxy collisions and mergers. We model the stellar kinematics of the Bulge Radial Velocity Assay (BRAVA) and find no sign that the Milky Way contains a classical bulge formed by scrambling pre-existing disks of stars in major mergers.
openaire +2 more sources
A census of the expected properties of classical Milky Way dwarfs in Milgromian dynamics
, 2014 Prompted by the recent successful predictions of the internal dynamics of Andromeda's satellite galaxies (McGaugh & Milgrom 2013a,b), we revisit the classical Milky Way dwarf spheroidal satellites Draco, Sculptor, Sextans, Carina, and Fornax in the ...
Famaey, Benoit +2 more
core +2 more sources
Finding r-II Sibling Stars in the Milky Way with the Greedy Optimistic Clustering Algorithm
The Astrophysical Journal, 2023 R -process enhanced stars with [Eu/Fe] ≥ +0.7 (so-called r -II stars) are believed to have formed in an extremely neutron-rich environment in which a rare astrophysical event (e.g., a neutron-star merger) occurred.
Kohei Hattori +2 more
doaj +1 more source