The ExoGRAVITY project: using single mode interferometry to characterize exoplanets
Abstract
Combining adaptive optics and interferometric observations results in a considerable contrast gain compared to single-telescope, extreme AO systems. Taking advantage of this, the ExoGRAVITY project is a survey of known young giant exoplanets located in the range of 0.1'' to 2'' from their stars. The observations provide astrometric data of unprecedented accuracy, being crucial for refining the orbital parameters of planets and illuminating their dynamical histories. Furthermore, GRAVITY will measure non-Keplerian perturbations due to planet-planet interactions in multi-planet systems and measure dynamical masses. Over time, repetitive observations of the exoplanets at medium resolution () will provide a catalogue of K-band spectra of unprecedented quality, for a number of exoplanets. The K-band has the unique properties that it contains many molecular signatures (CO, HO, CH, CO). This allows constraining precisely surface gravity, metallicity, and temperature, if used in conjunction with self-consistent models like Exo-REM. Further, we will use the parameter-retrieval algorithm petitRADTRANS to constrain the C/O ratio of the planets. Ultimately, we plan to produce the first C/O survey of exoplanets, kick-starting the difficult process of linking planetary formation with measured atomic abundances.
Cite
@article{arxiv.2101.07098,
title = {The ExoGRAVITY project: using single mode interferometry to characterize exoplanets},
author = {S. Lacour and J. J. Wang and M. Nowak and L. Pueyo and F. Eisenhauer and A. -M. Lagrange and P. Mollière and R. Abuter and A. Amorim and R. Asensio-Torres and M. Bauböck and M. Benisty and J. P. Berger and H. Beust and S. Blunt and A. Boccaletti and A. Bohn and M. Bonnefoy and H. Bonnet and W. Brandner and F. Cantalloube and P. Caselli and B. Charnay and G. Chauvin and E. Choquet and V. Christiaens and Y. Clénet and A. Cridland and P. T. de Zeeuw and R. Dembet and J. Dexter and A. Drescher and G. Duvert and F. Gao and P. Garcia and R. Garcia Lopez and T. Gardner and E. Gendron and R. Genzel and S. Gillessen and J. H. Girard and X. Haubois and G. Heissel and T. Henning and S. Hinkley and S. Hippler and M. Horrobin and M. Houllé and Z. Hubert and A. Jiménez-Rosales and L. Jocou and J. Kammerer and M. Keppler and P. Kervella and L. Kreidberg and V. Lapeyrère and J. -B. Le Bouquin and P. Léna and D. Lutz and A. -L. Maire and A. Mérand and J. D. Monnier and D. Mouillet and A. Muller and E. Nasedkin and T. Ott and G. P. P. L. Otten and C. Paladini and T. Paumard and K. Perraut and G. Perrin and O. Pfuhl and J. Rameau and L. Rodet and G. Rodriguez-Coira and G. Rousset and J. Shangguan and T. Shimizu and J. Stadler and O. Straub and C. Straubmeier and E. Sturm and T. Stolker and E. F. van Dishoeck and A. Vigan and F. Vincent and S. D. von Fellenberg and K. Ward-Duong and F. Widmann and E. Wieprecht and E. Wiezorrek and J. Woillez},
journal= {arXiv preprint arXiv:2101.07098},
year = {2021}
}
Comments
SPIE 2020, invited talk