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Atomic Data Needs in Astrophysics: The Galactic Center “Scandium Mystery”
Atoms, 2020 Investigating the Galactic center offers unique insights into the buildup and history of our Galaxy and is a stepping stone to understand galaxies in a larger context.
Brian Thorsbro
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The Astrophysical Journal Letters, 2023 Sgr A* is the variable electromagnetic source associated with accretion onto the Galactic center supermassive black hole. While the near-infrared (NIR) variability of Sgr A* was shown to be consistent over two decades, unprecedented activity in 2019 ...
Grant C. Weldon +12 more
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HCO+ Clouds in the SGR b2 Region [PDF]
Journal of Astronomy and Space Sciences, 2004 The HCO^+ 1--0 transition line was observed toward the Sgr B2 region in our Galactic center. We found that there exist two large-scale velocity structures of vlsr ˜50 and ˜100 km/s, which are thought to interact with each other.
Y. C. Minh
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A GeV-TeV particle component and the barrier of cosmic-ray sea in the Central Molecular Zone
Nature Communications, 2021 Galactic center is one of the most important cosmic-ray sources. Here, the authors show GeV-TeV cosmic ray density in the central molecular zone is lower than the cosmic ray sea component, suggesting presence of high energy particle accelerator at the ...
Xiaoyuan Huang, Qiang Yuan, Yi-Zhong Fan
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The Far Side of the Galactic Bar/Bulge Revealed through Semi-regular Variables
The Astronomical Journal, 2023 The Galactic bulge is critical to our understanding of the Milky Way. However, due to the lack of reliable stellar distances, the structure and kinematics of the bulge/bar beyond the Galactic center have remained largely unexplored.
Daniel R. Hey +10 more
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The Galactic Center Region Imaged by VERITAS from 2010{2012
Acta Polytechnica CTU Proceedings, 2014 The galactic center has long been a region of interest for high-energy and very-high-energy observations. Many potential sources of GeV/TeV gamma-ray emission are located in this region, e.g.
Matthias Beilicke
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Kinematics of the Local Spiral Structure Revealed by Young Stars in Gaia DR3
The Astrophysical Journal Supplement Series, 2023 Using young open clusters and O–B2-type stars in Gaia Data Release 3, we investigate the kinematics of the local spiral structure. In general, the young sources in the outer spiral arms may present larger peculiar motions than those in the inner spiral ...
Dejian Liu +6 more
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X-ray Insight into High-Energy Processes in Extreme Galactic Nuclear Environment
Universe, 2022 Nuclear regions of galaxies apparently play a disproportionately large role in regulating their formation and evolution. How this regulation works, however, remains very uncertain.
Q. Daniel Wang
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Are Supernovae Responsible for the Gamma Ray Spectrum from the Galactic Center?
Acta Polytechnica CTU Proceedings, 2014 We discuss the supernova remnants distribution as a function of the galactic longitude and compare their positions to that of the detected TeV gamma ray sources. A large fraction of these sources either coincide or a close by known supernova remnants. If
Todor Stanev
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Sources and Radiations of the Fermi Bubbles
UniverseTwo enigmatic gamma-ray features in the galactic central region, known as Fermi Bubbles (FBs), were found from Fermi-LAT data. An energy release, (e.g., by tidal disruption events in the Galactic Center, GC), generates a cavity with a shock that expands ...
Vladimir A. Dogiel, Chung-Ming Ko
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