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The mass of β Pictoris c from β Pictoris b orbital motion
- Lacour, S. (author)
- Wang, J. J. (author)
- Rodet, L. (author)
- show more...
- Nowak, M. (author)
- Shangguan, J. (author)
- Beust, H. (author)
- Lagrange, A.-M. (author)
- Abuter, R. (author)
- Amorim, A. (author)
- Asensio-Torres, R. (author)
- Benisty, M. (author)
- Berger, J.-P. (author)
- Blunt, S. (author)
- Boccaletti, A. (author)
- Bohn, A. (author)
- Bolzer, M.-L. (author)
- Bonnefoy, M. (author)
- Bonnet, H. (author)
- Bourdarot, G. (author)
- Brandner, W. (author)
- Cantalloube, F. (author)
- Caselli, P. (author)
- Charnay, B. (author)
- Chauvin, G. (author)
- Choquet, E. (author)
- Christiaens, V. (author)
- Clenet, Y. (author)
- du Foresto, V. Coude (author)
- Cridland, A. (author)
- Dembet, R. (author)
- Dexter, J. (author)
- de Zeeuw, T. (author)
- Drescher, A. (author)
- Duvert, G. (author)
- Eckart, A. (author)
- Eisenhauer, F. (author)
- Gao, F. (author)
- Garcia, P. (author)
- Garcia Lopez, R. (author)
- Gendron, E. (author)
- Genzel, R. (author)
- Gillessen, S. (author)
- Girard, J. H. (author)
- Haubois, X. (author)
- Heissel, G. (author)
- Henning, Th. (author)
- Hinkley, S. (author)
- Hippler, S. (author)
- Horrobin, M. (author)
- Houlle, M. (author)
- Hubert, Z. (author)
- Jocou, L. (author)
- Kammerer, J. (author)
- Keppler, M. (author)
- Kervella, P. (author)
- Kreidberg, L. (author)
- Lapeyrere, V. (author)
- Le Bouquin, J.-B. (author)
- Lena, P. (author)
- Lutz, D. (author)
- Maire, A.-L. (author)
- Merand, A. (author)
- Molliere, P. (author)
- Monnier, J. D. (author)
- Mouillet, D. (author)
- Nasedkin, E. (author)
- Ott, T. (author)
- Otten, G. P. P. L. (author)
- Paladini, C. (author)
- Paumard, T. (author)
- Perraut, K. (author)
- Perrin, G. (author)
- Pfuhl, O. (author)
- Rickman, E. (author)
- Pueyo, L. (author)
- Rameau, J. (author)
- Rousset, G. (author)
- Rustamkulov, Z. (author)
- Shimizu, T. (author)
- Sing, D. (author)
- Stadler, J. (author)
- Stolker, T. (author)
- Straub, O. (author)
- Straubmeier, C. (author)
- Sturm, E. (author)
- Tacconi, L. J. (author)
- van Dishoeck, E. F. (author)
- Vigan, A. (author)
- Vincent, F. (author)
- von Fellenberg, S. D. (author)
- Ward-Duong, K. (author)
- Widmann, F. (author)
- Wieprecht, E. (author)
- Wiezorrek, E. (author)
- Woillez, J. (author)
- Yazici, S. (author)
- Young, A. (author)
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- (creator_code:org_t)
- 2021-10-08
- 2021
- English.
- In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 654
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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 β Pictoris b with a new set of observations from the GRAVITY interferometer. The orbital motion of β Pictoris b is fit using Markov chain Monte Carlo simulations in Jacobi coordinates. The inner planet, β 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 β Pictoris c and (ii) constrain its mass to 10.04(-3.10)(+4.53) M-Jup. If one adds the astrometry of β Pictoris c, the mass is narrowed down to 9.15(-1.06)(+1.08) M-Jup. The inclusion of radial velocity measurements does not affect the orbital parameters significantly, but it does slightly decrease the mass estimate to 8.89(-0.75)(+0.75) M-Jup. With a semimajor axis of 2.68 +/- 0.02 au, a period of 1221 +/- 15 days, and an eccentricity of 0.32 +/- 0.02, the orbital parameters of β Pictoris c are now constrained as precisely as those of β Pictoris b. The orbital configuration is compatible with a high-order mean-motion resonance (7:1). The impact of the resonance on the planets' dynamics would then be negligible with respect to the secular perturbations, which might have played an important role in the eccentricity excitation of the outer planet.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- planets and satellites: detection
- astrometry
- instrumentation: interferometers
- instrumentation: high angular resolution
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Lacour, S.
- Wang, J. J.
- Rodet, L.
- Nowak, M.
- Shangguan, J.
- Beust, H.
- show more...
- Lagrange, A.-M.
- Abuter, R.
- Amorim, A.
- Asensio-Torres, ...
- 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. C ...
- Cridland, A.
- Dembet, R.
- Dexter, J.
- de Zeeuw, T.
- Drescher, A.
- Duvert, G.
- Eckart, A.
- Eisenhauer, F.
- Gao, F.
- Garcia, P.
- Garcia Lopez, R.
- 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. ...
- Paladini, C.
- Paumard, T.
- Perraut, K.
- Perrin, G.
- Pfuhl, O.
- Rickman, E.
- Pueyo, L.
- Rameau, J.
- Rousset, G.
- Rustamkulov, Z.
- Samland, Matthia ...
- Shimizu, T.
- Sing, D.
- Stadler, J.
- Stolker, T.
- Straub, O.
- Straubmeier, C.
- Sturm, E.
- Tacconi, L. J.
- van Dishoeck, E. ...
- Vigan, A.
- Vincent, F.
- von Fellenberg, ...
- Ward-Duong, K.
- Widmann, F.
- Wieprecht, E.
- Wiezorrek, E.
- Woillez, J.
- Yazici, S.
- Young, A.
- show less...
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- Stockholm University
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