Results 1 to 10 of about 157,868 (337)
Proceedings of the International Astronomical Union, 2007 In the past decade high resolution measurements in the infrared employing adaptive optics imaging on 10m telescopes have allowed determining the three dimensional orbits stars within ten light hours of the compact radio source at the center of the Milky ...
Genzel, R., Karas, V.
core +3 more sources
The Galactic Center Weather Forecast [PDF]
The Astrophysical Journal, 2012 In accretion-based models for Sgr A* the X-ray, infrared, and millimeter emission arise in a hot, geometrically thick accretion flow close to the black hole.
Dolence, Joshua C. +3 more
core +2 more sources
The Interaction between Stars and Past AGN Disk: Possible Explanation for the Kinematic Distributions of S-stars in the Galactic Center [PDF]
The Astrophysical JournalThe presence of young stars, aged around several million years and situated within the range of ∼0.04–1 pc from our Galactic center raises a question about their origins and dynamical evolutions.
Xiao Fan +5 more
doaj +2 more sources
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
doaj +1 more source
Symposium - International Astronomical Union, 1981 Recent infrared and radio observations of the Galactic Center are reviewed. For the region between 1 and 100 pc most of the observed phenomena can be explained by a large density of late-type stars, a ring of molecular material, and a number of regions of active star formation. The central parsec (Sgr A) appears to be a unique region of activity in the
Ian Gatley, E. E. Becklin
openaire +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.
Renaud, Florent +2 more
openaire +2 more sources
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 +4 more sources
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
The origin of IRS 16: dynamically driven inspiral of a dense star cluster to the Galactic center? [PDF]
, 2003 We use direct N-body simulations to study the inspiral and internal evolution of dense star clusters near the Galactic center. These clusters sink toward the center due to dynamical friction with the stellar background, and may go into core collapse ...
Gerhard, Ortwin +2 more
core +8 more sources