Institute of Astronomy

First science results of the ExoGRAVITY Large Program

SpeakerTalk DateTalk Series
Mathias Nowak10 November 2021Institute of Astronomy Seminars


After the detection of the giant planet HR 8799 e with VLTI/GRAVITY and the characterization of the atmosphere of beta Pictoris b two years ago, it became apparent that long-baseline interferometry could play a major role in the characterization of giant planets. The ExoGRAVITY Large Program was granted 14 nights on the 4 UTs of the VLT, with the aim of observing all the directly imaged planets.
We are now half-way through the program, and a number of exciting results have already came out: from the characterization of the HR8799 system to the direct detection of the radial-velocity planet beta Pic c, and the measurement of its mass through its effect on the orbit of its sister planet beta Pic b.
I will give a general overview of the program: the science goals, the instrument, the observing strategy, etc. I will also dive into some of the most exciting results obtained so far.


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