The mass of beta Pictoris c from beta Pictoris b orbital motion
- Lacour, S.
- Wang, J. J.
- Rodet, L.
- Nowak, M.
- Shangguan, J.
- Beust, H.
- Lagrange, A-M
- Abuter, R.
- Amorim, A.
- Asensio-Torres, R.
- Benisty, M.
- Berger, J-P
- Blunt, S.
- Boccaletti, A.
- Bohn, A.
- Bolzer, M-L
- Bonnefoy, M.
- Bonnet, H.
- Bourdarot, G.
- Brandner, W.
- Cantalloube, F.
- Caselli, P.
- Charnay, B.
- Chauvin, G.
- Choquet, E.
- Christiaens, V
- Clenet, Y.
- du Foresto, V. Coude
- Cridland, A.
- Dembet, R.
- Dexter, J.
- de Zeeuw, T.
- Drescher, A.
- Duvert, G.
- Eckart, A.
- Eisenhauer, F.
- Gao, F.
- Garcia, P.
- Lopez, R. Garcia
- Gendron, E.
- Genzel, R.
- Gillessen, S.
- Girard, J. H.
- Haubois, X.
- Heissel, G.
- Henning, Th
- Hinkley, S.
- Hippler, S.
- Horrobin, M.
- Houlle, M.
- Hubert, Z.
- Jocou, L.
- Kammerer, J.
- Keppler, M.
- Kervella, P.
- Kreidberg, L.
- Lapeyrere, V
- Le Bouquin, J-B
- Lena, P.
- Lutz, D.
- Maire, A-L
- Merand, A.
- Molliere, P.
- Monnier, J. D.
- Mouillet, D.
- Nasedkin, E.
- Ott, T.
- Otten, G. P. P. L.
- Paladini, C.
- Paumard, T.
- Perraut, K.
- Perrin, G.
- Pfuhl, O.
- Rickman, E.
- Pueyo, L.
- Rameau, J.
- Rousset, G.
- Rustamkulov, Z.
- Samland, M.
- Shimizu, T.
- Sing, D.
- Stadler, J.
- Stolker, T.
- Straub, O.
- Straubmeier, C.
- Sturm, E.
- Tacconi, L. J.
- van Dishoeck, E. F.
- Vigan, A.
- Vincent, F.
- von Fellenberg, S. D.
- Ward-Duong, K.
- Widmann, F.
- Wieprecht, E.
- Wiezorrek, E.
- Woillez, J.
- Yazici, S.
- Young, A.
DOIAbstract
Aims. We aim to demonstrate that the presence and mass of an exoplanet can now be effectively derived from the astrometry of another exoplanet. Methods. We combined previous astrometry of beta Pictoris b with a new set of observations from the GRAVITY interferometer. The orbital motion of beta Pictoris b is fit using Markov chain Monte Carlo simulations in Jacobi coordinates. The inner planet, beta Pictoris c, was also reobserved at a separation of 96 mas, confirming the previous orbital estimations. Results. From the astrometry of planet b only, we can (i) detect the presence of beta Pictoris c and (ii) constrain its mass to 10.04(-3.10)(+4.53) M-Jup . If one adds the astrometry of beta Pictoris c, the mass is narrowed down to 9.15(-1.06)(...
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