Results 11 to 20 of about 153,252 (195)
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.
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The stars of the galactic center
The Astrophysical Journal, 2005 We consider the origin of the so-called S stars orbiting the supermassive black hole at the very center of the Galaxy. These are usually assumed to be massive main-sequence stars.
Andrew King, Eckart A., Melvyn B. Davies
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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
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Galactic Center Pulsars with the ngVLA
, 2018 Pulsars in the Galactic Center (GC) are important probes of General Relativity, star formation, stellar dynamics, stellar evolution, and the interstellar medium. Despite years of searching, only a handful of pulsars in the central 0.5 deg are known.
Bower, Geoffrey C. +11 more
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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
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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
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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
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The Young Stars in the Galactic Center
The Astrophysical Journal Letters, 2022 Abstract We present a large ∼30″ × 30″ spectroscopic survey of the Galactic Center using the SINFONI IFU at the VLT. Combining observations of the last two decades we compile spectra of over 2800 stars. Using the Bracket-γ absorption lines, we identify 195 young stars, extending the list of known young stars by 79.
Sebastiano D. von Fellenberg +13 more
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The distance to the Galactic Center [PDF]
Proceedings of the International Astronomical Union, 2012 AbstractOne of the Milky Way's fundamental parameters is the distance of the Sun from the Galactic Center, R0. This article reviews the various ways of estimating R0, placing special emphasis on methods that have become possible recently. In particular, we focus on the geometric distance estimate made possible thanks to observations of individual ...
Gillessen, S. +5 more
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A Disk in the Galactic Center in the Past? [PDF]
, 2006 We raise the question whether in the past a disk could have existed in our Galactic Center which has disappeared now. Our model for the interaction of a cool disk and a hot corona above (Liu et al. 2004) allows to estimate an upper limit for the mass that might have been present in a putative accretion disk after a last star forming event, but would ...
Meyer-Hofmeister, E., Meyer, F., Liu, B.
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