دورية أكاديمية
First VLTI/GRAVITY Observations of HIP 65426 b: Evidence for a Low or Moderate Orbital Eccentricity
| العنوان: | First VLTI/GRAVITY Observations of HIP 65426 b: Evidence for a Low or Moderate Orbital Eccentricity |
|---|---|
| المؤلفون: | Blunt, Sarah, Balmer, W.O., Wang, J.J., Lacour, S., Petrus, S., Bourdarot, G., Kammerer, J., Pourré, N., Rickman, E., Shangguan, J., Winterhalder, T., Abuter, R., Amorim, A., Asensio-Torres, R., Benisty, M., Berger, J.-P., Beust, H., Boccaletti, A., Bohn, A., Bonnefoy, M., Bonnet, H., Brandner, W., Cantalloube, Faustine, Caselli, P., Charnay, B., Chauvin, G., Chavez, A., Choquet, E., Christiaens, Valentin, Clénet, Y., du Foresto, V. Coudé, Cridland, A., Dembet, R., Drescher, A., Duvert, G., Eckart, A., Eisenhauer, F., Feuchtgruber, H., 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., Houllé, M., Hubert, Z., Jocou, L., Keppler, M., Kervella, P., Kreidberg, L., Lagrange, A.-M., Lapeyrère, V., Le Bouquin, J.-B., Léna, P., Lutz, D., Maire, A.-L., Mang, F., Marleau, G.-D., Mérand, A., Mollière, P., Monnier, J.D., Mordasini, C., Mouillet, D., Nasedkin, E., Nowak, M., Ott, T., Otten, G.P.P.L., Paladini, C., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Pueyo, L., Rameau, J., Rodet, L., Rustamkulov, Z., Shimizu, T., Sing, D., Stolker, T., Straubmeier, C., Sturm, E., Tacconi, L.J., van Dishoeck, E.F., Vigan, A., Vincent, F., Ward-Duong, K., Widmann, F., Wieprecht, E., Wiezorrek, E., Woillez, J., Yazici, S., Young, A., The exoGRAVITY collaboration |
| المصدر: | Astronomical Journal, 6 (257), 257 (2023-12) |
| بيانات النشر: | American Astronomical Society |
| سنة النشر: | 2023 |
| المجموعة: | University of Liège: ORBi (Open Repository and Bibliography) |
| مصطلحات موضوعية: | Astronomy and Astrophysics, Space and Planetary Science, Physical, chemical, mathematical & earth Sciences, Space science, astronomy & astrophysics, Physique, chimie, mathématiques & sciences de la terre, Aérospatiale, astronomie & astrophysique |
| الوصف: | peer reviewed ; Giant exoplanets have been directly imaged over orders of magnitude of orbital separations, prompting theoretical and observational investigations of their formation pathways. In this paper, we present new VLTI/GRAVITY astrometric data of HIP 65426 b, a cold, giant exoplanet which is a particular challenge for most formation theories at a projected separation of 92 au from its primary. Leveraging GRAVITY’s astrometric precision, we present an updated eccentricity posterior that disfavors large eccentricities. The eccentricity posterior is still prior dependent, and we extensively interpret and discuss the limits of the posterior constraints presented here. We also perform updated spectral comparisons with self-consistent forward-modeled spectra, finding a best-fit ExoREM model with solar metallicity and C/O = 0.6. An important caveat is that it is difficult to estimate robust errors on these values, which are subject to interpolation errors as well as potentially missing model physics. Taken together, the orbital and atmospheric constraints paint a preliminary picture of formation inconsistent with scattering after disk dispersal. Further work is needed to validate this interpretation. Analysis code used to perform this work is available on GitHub: https://github.com/sblunt/hip65426Test. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0004-6256 1538-3881 |
| العلاقة: | https://iopscience.iop.org/article/10.3847/1538-3881/ad06b7Test; urn:issn:0004-6256; urn:issn:1538-3881; https://orbi.uliege.be/handle/2268/310948Test; info:hdl:2268/310948; https://orbi.uliege.be/bitstream/2268/310948/1/Blunt-2023-First%20VLTI-GRAVITY%20Observations%20of%20HIP%2065426%20b%20Evidence%20for%20a%20Low%20or%20Moderate%20Orbital.pdfTest; scopus-id:2-s2.0-85178241888 |
| DOI: | 10.3847/1538-3881/ad06b7 |
| الإتاحة: | https://doi.org/10.3847/1538-3881/ad06b7Test https://orbi.uliege.be/handle/2268/310948Test https://orbi.uliege.be/bitstream/2268/310948/1/Blunt-2023-First%20VLTI-GRAVITY%20Observations%20of%20HIP%2065426%20b%20Evidence%20for%20a%20Low%20or%20Moderate%20Orbital.pdfTest |
| حقوق: | open access ; http://purl.org/coar/access_right/c_abf2Test ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.7E1FFB20 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 00046256 15383881 |
|---|---|
| DOI: | 10.3847/1538-3881/ad06b7 |