Academic Journal
GRAVITY K -band spectroscopy of HD 206893 B
| العنوان: | GRAVITY K -band spectroscopy of HD 206893 B |
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| المؤلفون: | Kammerer, J., Lacour, S., Stolker, T., Mollière, P., Sing, D. K., Nasedkin, E., Kervella, P., Wang, J. J., Ward-Duong, K., Nowak, M., Abuter, R., Amorim, A., Asensio-Torres, R., Bauböck, M., Benisty, M., Berger, J.-P., Beust, H., Blunt, S., Boccaletti, A., Bohn, A., Bolzer, M.-L., Bonnefoy, M., Bonnet, H., 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., Haubois, X., Heißel, G., Henning, T., Hinkley, S., Hippler, S., Horrobin, M., Houllé, M., Hubert, Z., Jocou, L., Keppler, M., Kreidberg, L., Lagrange, A.-M., Lapeyrère, V., Le Bouquin, J.-B., Léna, P., Lutz, D., Maire, Anne-Lise, Mérand, A., Monnier, J. D., Mouillet, D., Muller, A., Ott, T., Otten, G. P. P. L., Paladini, C., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Pueyo, L., Rameau, J., Rodet, L., Rousset, G., Rustamkulov, Z., Shangguan, J., Shimizu, T., Stadler, J., Straub, O., Straubmeier, C., Sturm, E., Tacconi, L. J., Van Dishoeck, E. F., Vigan, A., Vincent, F., Von Fellenberg, S. D., Widmann, F., Wieprecht, E., Wiezorrek, E., Woillez, J., Yazici, S. |
| المصدر: | Astronomy and Astrophysics, 652, A57 (2021) |
| بيانات النشر: | EDP Sciences |
| سنة النشر: | 2021 |
| المجموعة: | University of Liège: ORBi (Open Repository and Bibliography) |
| مصطلحات موضوعية: | Planets and satellites: atmospheres, Planets and satellites: detection, Planets and satellites: gaseous planets, Techniques: interferometric, Color, Corundum, Dust, Infrared devices, Orbits, Signal to noise ratio, Water absorption, Absorption features, Atmospheric model, Atmospheric parameters, Eccentric orbits, Extinction curves, Group memberships, Orbital parameters, Parameter spaces, Gravitation, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique |
| الوصف: | peer reviewed ; Context. Near-infrared interferometry has become a powerful tool for studying the orbital and atmospheric parameters of substellar companions. Aims. We aim to reveal the nature of the reddest known substellar companion HD 206893 B by studying its near-infrared colors and spectral morphology and by investigating its orbital motion. Methods. We fit atmospheric models for giant planets and brown dwarfs and perform spectral retrievals with petitRADTRANS and ATMO on the observed GRAVITY, SPHERE, and GPI spectra of HD 206893 B. To recover its unusual spectral features, first and foremost its extremely red near-infrared color, we include additional extinction by high-altitude dust clouds made of enstatite grains in the atmospheric model fits. However, forsterite, corundum, and iron grains predict similar extinction curves for the grain sizes considered here. We also infer the orbital parameters of HD 206893 B by combining the ~100 μas precision astrometry from GRAVITY with data from the literature and constrain the mass and position of HD 206893 C based on the Gaia proper motion anomaly of the system. Results. The extremely red color and the very shallow 1.4 μm water absorption feature of HD 206893 B can be fit well with the adapted atmospheric models and spectral retrievals. By comparison with AMES-Cond evolutionary tracks, we find that only some atmosphericmodels predict physically plausible objects. Altogether, our analysis suggests an age of ~ 3-300 Myr and a mass of ~ 5-30 MJup for HD 206893 B, which is consistent with previous estimates but extends the parameter space to younger and lower-mass objects. The GRAVITY astrometry points to an eccentric orbit (e = 0.29-0.11+0.06) with a mutual inclination of <34.4 deg with respectto the debris disk of the system. Conclusions. While HD 206893 B could in principle be a planetary-mass companion, this possibility hinges on the unknown influence of the inner companion on the mass estimate of 10-4+5 MJup from radial velocity and Gaia as well as a ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0004-6361 1432-0746 |
| Relation: | urn:issn:0004-6361; urn:issn:1432-0746; https://orbi.uliege.be/handle/2268/267914; info:hdl:2268/267914 |
| DOI: | 10.1051/0004-6361/202140749 |
| الاتاحة: | https://orbi.uliege.be/handle/2268/267914 https://orbi.uliege.be/bitstream/2268/267914/1/aa40749-21.pdf https://doi.org/10.1051/0004-6361/202140749 |
| Rights: | open access ; http://purl.org/coar/access_right/c_abf2 ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.EE757442 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 00046361 14320746 |
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| DOI: | 10.1051/0004-6361/202140749 |