Results 21 to 30 of about 3,761,627 (366)
The Hills Mechanism and the Galactic Center S-stars [PDF]
Astrophysical Journal, 2020 Our Galactic center contains young stars, including the few million year-old clockwise disk between 0.05 and 0.5 pc from the Galactic center and the S-star cluster of B-type stars at a galactocentric distance of 0.01 pc. Recent observations suggest the S-
A. Generozov, A. Madigan
semanticscholar +1 more source
THE GALACTIC CENTER: NOT AN ACTIVE GALACTIC NUCLEUS [PDF]
The Astrophysical Journal Supplement Series, 2013 AbstractWe present 10 μm – 35μm Spitzer spectra of the interstellar medium in the central molecular zone (CMZ), the central 210 pc × 60 pc of the Galactic center (GC). We present maps of the CMZ in ionic and H2 emission, covering a more extensive area than earlier spectroscopic surveys in this region.
An, Deokkeun +2 more
openaire +7 more sources
WIMPs at the galactic center [PDF]
Journal of Cosmology and Astroparticle Physics, 2015 Simple models of weakly interacting massive particles (WIMPs) predict dark matter annihilations into pairs of electroweak gauge bosons, Higgses or tops, which through their subsequent cascade decays produce a spectrum of gamma rays. Intriguingly, an excess in gamma rays coming from near the Galactic center has been consistently observed in Fermi data ...
Agrawal, Prateek +3 more
openaire +3 more sources
Kinematic Structure of the Galactic Center S Cluster [PDF]
Astrophysical Journal, 2020 We present a detailed analysis of the kinematics of 112 stars that mostly comprise the high-velocity S cluster and orbit the supermassive black hole Sgr A* at the center of the Milky Way.
B. Ali +9 more
semanticscholar +1 more source
The Stars of the Galactic Center [PDF]
The Astrophysical Journal, 2005 9 pages, 1 figure, ApJ Letters, in ...
Davies, MB, King, A
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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
doaj +1 more source
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
doaj +1 more source
Relativistic redshift of the star S0-2 orbiting the Galactic Center supermassive black hole [PDF]
Science, 2019 Gravitational redshift in the Galactic Center General relativity predicts that light emitted by an object in a strong gravitational field—for example, close to a black hole—should be shifted to longer wavelengths.
T. Do +28 more
semanticscholar +1 more source
Galactic dynamics feeding the Galactic center [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractWe present the hierarchical structure of the gas and its rapid evolution in the central region of a simulation of the entire Milky Way, run at subparsec resolution. We emphasize the coupling between the kpc-scale dynamics, the molecular ring and the central 5 pc disk feeding the supermassive black hole.
Eric Emsellem +2 more
openaire +2 more sources
Primordial Black Holes as a Dark Matter Candidate Are Severely Constrained by the Galactic Center 511 keV γ-Ray Line. [PDF]
Physical Review Letters, 2019 We derive the strongest constraint on the fraction of dark matter that can be composed of low mass primordial black holes by using the observation of the Galactic Center 511 keV γ-ray line.
Ranjan Laha
semanticscholar +1 more source