Results 41 to 50 of about 3,761,627 (366)
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
doaj +1 more source
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
doaj +1 more source
An Update on Monitoring Stellar Orbits in the Galactic Center [PDF]
, 2016 Using 25 years of data from uninterrupted monitoring of stellar orbits in the Galactic Center, we present an update of the main results from this unique data set: a measurement of mass and distance to Sgr A*.
S. Gillessen +11 more
semanticscholar +1 more source
A Hidden Friend for the Galactic Center Black Hole, Sgr A* [PDF]
Astrophysical Journal, 2019 The hierarchical nature of galaxy formation suggests that a supermassive black hole binary could exist in our galactic center. We propose a new approach to constraining the possible orbital configuration of such a binary companion to the galactic center ...
S. Naoz +5 more
semanticscholar +1 more source
Symposium - International Astronomical Union, 1984 Infrared studies of the interstellar medium in the central ten parsecs of the Milky Way are reviewed. Far infrared (30 – 150μm) photometry gives the density distribution of the dust: the material is confined chiefly to the plane of the Galaxy, and there is a central cavity of two parsecs radius within which the density is extremely low (Av ≪ 1 ...
openaire +3 more sources
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 +3 more sources
Effect of Electromagnetic Interaction on Galactic Center Flare Components [PDF]
Astrophysical Journal, 2019 Recently, near-infrared GRAVITY@ESO observations at 2.2 μm announced the detection of three bright “flares” in the vicinity of the Galactic center supermassive black hole (SMBH) that exhibited orbital motion at a distance of about 6–11 gravitational ...
A. Tursunov +7 more
semanticscholar +1 more source
How many young star clusters exist in the Galactic center? [PDF]
, 2000 We study the evolution and observability of young compact star clusters within about 200pc of the Galactic center. Calculations are performed using direct N-body integration on the GRAPE-4, including the effects of both stellar and binary evolution and ...
Dutra C. M. +8 more
core +3 more sources
Gaia and the Galactic Center Origin of Hypervelocity Stars [PDF]
Astrophysical Journal, 2018 We use new Gaia measurements to explore the origin of the highest velocity stars in the hypervelocity star (HVS) survey. The measurements reveal a clear pattern in B-type stars.
Warren R. Brown +4 more
semanticscholar +1 more source
The Distance to the Galactic Center [PDF]
Publications of the Astronomical Society of the Pacific, 2000 AbstractThe Optical Gravitational Lensing Experiment (OGLE) data on high-amplitude δ Scuti Stars (HADS) and RR Lyrae stars have been analyzed to determine the distance to the galactic bulge. We find a mean value of 14.47 ± 0.08 mag for the bulge distance modulus.
J. B. Madsen +3 more
openaire +3 more sources