{"paper":{"title":"First VLTI/GRAVITY Observations of HIP 65426 b: Evidence for a Low or Moderate Orbital Eccentricity","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Amorim, A. Boccaletti, A. Bohn, A. Chavez, A. Cridland, A. Drescher, A. Eckart, A.-L. Maire, A. M\\'erand, A.-M. Lagrange, A. Vigan, A. Young, B. Charnay, C. Mordasini, C. Paladini, C. Straubmeier, D. Lutz, D. Mouillet, D. Sing, E. Choquet, E.F. van Dishoeck, E. Gendron, E. Nasedkin, E. Rickman, E. Sturm, E. Wieprecht, E. Wiezorrek, F. Cantalloube, F. Eisenhauer, F. Mang, F. Vincent, F. Widmann, G. Bourdarot, G. Chauvin, G.-D. Marleau, G. Duvert, G. Hei{\\ss}el, G. Perrin, G. P. P. L. Otten, H. Beust, H. Bonnet, H. Feuchtgruber, J.-B. Le Bouquin, J. D. Monnier, J. H. Girard, J. J. Wang, J. Kammerer, J.-P. Berger, J. Rameau, J. Shangguan, J. Woillez, K. Perraut, K. Ward-Duong, L. Jocou, L. J. Tacconi, L. Kreidberg, L. Pueyo, L. Rodet, M. Benisty, M. Bonnefoy, M. Horrobin, M. Houll\\'e, M. Keppler, M. Nowak, N. Pourr\\'e, O. Pfuhl, P. Caselli, P. Garcia, P. Kervella, P. L\\'ena, P. Molli\\`ere, R. Abuter, R. Asensio-Torres, R. Dembet, R. Garcia Lopez, R. Genzel, S. Blunt, S. Gillessen, S. Hinkley, S. Hippler, S. Lacour, S. Petrus, S. Yazici, Th. Henning, T. Ott, T. Paumard, T. Shimizu, T. Stolker, T. Winterhalder, V. Christiaens, V. Coud\\'e du Foresto, V. Lapeyr\\`ere, W. Brandner, W. O. Balmer, X. Haubois, Y. Cl\\'enet, Z. Hubert, Z. Rustamkulov","submitted_at":"2023-09-29T21:13:47Z","abstract_excerpt":"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"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.00148","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2310.00148/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}