Detection of relativistic effects on the S2 orbit with GRAVITY

The second generation instrument of the VLTI, GRAVITY, is expected to reach an astrometric accuracy of about 10 μas. It will thus possible to probe the spacetime close to the compact source Sagittarius A* (Sgr A*) at the Galactic Center by using accurate astrometric observations of the second closes...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2016-07, Vol.11 (S322), p.25-30
Main Authors: Grould, Marion, Vincent, Frédéric H., Paumard, Thibaut, Perrin, Guy
Format: Article
Language:English
Subjects:
Astrology
Astronomical bodies
Astronomy
Contributed Papers
Gravitation
Gravity
Orbits
Relativistic effects
Spectrographs
Stars
Stars & galaxies
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Summary:The second generation instrument of the VLTI, GRAVITY, is expected to reach an astrometric accuracy of about 10 μas. It will thus possible to probe the spacetime close to the compact source Sagittarius A* (Sgr A*) at the Galactic Center by using accurate astrometric observations of the second closest star to the Galactic Center, S2. In particular, we show that combining GRAVITY and spectrograph instruments will allow us to detect several relativistic effects such as pericenter advance or the Lense-Thirring effect.
ISSN:1743-9213
1743-9221
DOI:10.1017/S174392131601245X