دورية أكاديمية
The mass of β Pictoris c from β Pictoris b orbital motion
| العنوان: | The mass of β Pictoris c from β Pictoris b orbital motion |
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| المؤلفون: | 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, Valentin, Clénet, Y., Coudé Du Foresto, V., Cridland, A., Dembet, R., Dexter, J., De Zeeuw, P. 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, T., Hinkley, S., Hippler, S., Horrobin, M., Houllé, M., Hubert, Z., Jocou, L., Kammerer, J., Keppler, M., Kervella, P., Kreidberg, L., Lapeyrère, V., Le Bouquin, J.-B., Léna, P., Lutz, D., Maire, Anne-Lise, Mérand, A., Mollière, 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. |
| المصدر: | Astronomy and Astrophysics, 654, L2 (2021) |
| بيانات النشر: | EDP Sciences |
| سنة النشر: | 2021 |
| المجموعة: | University of Liège: ORBi (Open Repository and Bibliography) |
| مصطلحات موضوعية: | Astrometry, Instrumentation: high angular resolution, Instrumentation: interferometers, Planets and satellites: detection, Extrasolar planets, Intelligent systems, Interferometers, Markov processes, Orbits, Satellites, Exo-planets, Instrumentation:high angular resolution, Jacobi coordinates, Markov chain monte carlo simulation, Orbital motions, Orbital parameters, Pictoris, Planets and satellites: detections, Monte Carlo methods, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique |
| الوصف: | peer reviewed ; 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 MJup. If one adds the astrometry of β Pictoris c, the mass is narrowed down to 9.15-1.06+1.08 MJup. 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 MJup. 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. © 2021 S. Lacour et al. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0004-6361 1432-0746 |
| العلاقة: | urn:issn:0004-6361; urn:issn:1432-0746; https://orbi.uliege.be/handle/2268/267919Test; info:hdl:2268/267919; https://orbi.uliege.be/bitstream/2268/267919/1/aa41889-21.pdfTest; scopus-id:2-s2.0-85117070383 |
| DOI: | 10.1051/0004-6361/202141889 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/202141889Test https://orbi.uliege.be/handle/2268/267919Test https://orbi.uliege.be/bitstream/2268/267919/1/aa41889-21.pdfTest |
| حقوق: | open access ; http://purl.org/coar/access_right/c_abf2Test ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.90C408FF |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 00046361 14320746 |
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| DOI: | 10.1051/0004-6361/202141889 |