Detection of Galactic Center source G2 at 3.8 μm during periapse passage

@article{Witzel2014DetectionOG,
title={Detection of Galactic Center source G2 at 3.8 $\mu$m during periapse passage},
author={Gunther Witzel and Andrea M. Ghez and Mark R. Morris and Breann N. Sitarski and Anna Boehle and Smadar Naoz and Randall D. Campbell and Eric Edward Becklin and Gabriela Canalizo and Samantha Chappell and Tuan Do and Jessica R. Lu and Keith Y. Matthews and Leonhard Meyer and Alan N. Stockton and Peter Wizinowich and Sylvana Yelda},
journal={The Astrophysical Journal},
year={2014},
volume={796}
}
We report new observations of the Galactic Center source G2 from the W. M. Keck Observatory. G2 is a dusty red object associated with gas that shows tidal interactions as it nears closest approach with the Galaxy’s central black hole. Our observations, conducted as G2 passed through periapse, were designed to test the proposal that G2 is a 3 earth mass gas cloud. Such a cloud should be tidally disrupted during periapse passage. The data were obtained using the Keck II laser guide star adaptive… Expand
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References

SHOWING 1-10 OF 45 REFERENCES
KECK OBSERVATIONS OF THE GALACTIC CENTER SOURCE G2: GAS CLOUD OR STAR?
We present new observations and analysis of G2—the intriguing red emission-line object which is quickly approaching the Galaxy's central black hole. The observations were obtained with the laserExpand
The Keplerian orbit of G2
• L. Meyer, +8 authors E. Becklin
• Physics
• Proceedings of the International Astronomical Union
• 2013
Abstract We give an update of the observations and analysis of G2 – the gaseous red emission-line object that is on a very eccentric orbit around the Galaxy's central black hole and predicted to comeExpand
THE GALACTIC CENTER CLOUD G2 AND ITS GAS STREAMER
We present new, deep near-infrared SINFONI @ VLT integral field spectroscopy of the gas cloud G2 in the Galactic Center, from late 2013 August, 2014 April, and 2014 July. G2 is visible inExpand
The Supermassive Black Hole at the Center of the Milky Way
We report the detection of a variable point source, imaged at L' (3.8 μm) with the Keck II 10 m telescope's adaptive optics system, that is coincident to within 18 mas (1 σ) of the Galaxy's centralExpand
New Observations of the Gas Cloud G2 in the Galactic Center
We present new observations of the recently discovered gas cloud G2 currently falling toward the massive black hole in the Galactic Center. The new data confirm that G2 is on a highly ellipticalExpand
Pericenter passage of the gas cloud G2 in the galactic center
We have further followed the evolution of the orbital and physical properties of G2, the object currently falling toward the massive black hole in the Galactic Center on a near-radial orbit. New,Expand
Near-infrared flares from accreting gas around the supermassive black hole at the Galactic Centre
High-resolution infrared observations of Sagittarius A* reveal ‘quiescent’ emission and several flares, and traces very energetic electrons or moderately hot gas within the innermost accretion region. Expand
A gas cloud on its way towards the supermassive black hole at the Galactic Centre
The presence of a dense gas cloud approximately three times the mass of Earth that is falling into the accretion zone of Sagittarius A*, a compact radio source at the Galactic Centre, is reported. Expand
Physics of the Galactic Center Cloud G2, on Its Way toward the Supermassive Black Hole
We investigate the origin, structure, and evolution of the small gas cloud G2, which is on an orbit almost straight into the Galactic central supermassive black hole (SMBH). G2 is a sensitive probeExpand
High Proper-Motion Stars in the Vicinity of Sagittarius A*: Evidence for a Supermassive Black Hole at the Center of Our Galaxy
• Physics
• 1998
Over a 2 year period we have conducted a di†raction-limited imaging study at 2.2 km of the inner 6A ) 6A of the central stellar cluster of the Galaxy using the W. M. Keck 10 m telescope. The K-bandExpand