{"paper":{"title":"GRAVITY K-band spectroscopy of HD 206893 B: brown dwarf or exoplanet","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. Amorim, A. Boccaletti, A. Bohn, A. Cridland, A. Drescher, A. Eckart, A.-L. Maire, A. M\\'erand, A.-M. Lagrange, A. M\\\"uller, A. Vigan, B. Charnay, C. Paladini, C. Straubmeier, D. K. Sing, D. Lutz, D. Mouillet, E. Choquet, E.F. van Dishoeck, E. Gendron, E. Nasedkin, E. Sturm, E. Wieprecht, E. Wiezorrek, F. Cantalloube, F. Eisenhauer, F. Gao, F. Vincent, F. Widmann, G. Chauvin, G. Duvert, G. Hei{\\ss}el, G. Perrin, G. P. P. L. Otten, GRAVITY Collaboration, G. Rousset, H. Beust, H. Bonnet, J.-B. Le Bouquin, J. Dexter, J. D. Monnier, J. Girard, J. J. Wang, J. Kammerer, J.-P. Berger, J. Rameau, J. Shangguan, J. Stadler, J. Woillez, K. Perraut, K. Ward-Duong, L. Jocou, L. J. Tacconi, L. Kreidberg, L. Pueyo, L. Rodet, M. Baub\\\"ock, M. Benisty, M. Bonnefoy, M. Horrobin, M. Houll\\'e, M. Keppler, M.-L. Bolzer, M. Nowak, O. Pfuhl, O. Straub, P. Caselli, P. Garcia, P. Kervella, P. L\\'ena, P. Molli\\`ere, P. T. de Zeeuw, R. Abuter, R. Asensio-Torres, R. Dembet, R. Garcia Lopez, R. Genzel, S. Blunt, S. D. von Fellenberg, S. Gillessen, S. Hinkley, S. Hippler, S. Lacour, S. Yazici, T. Henning, T. Ott, T. Paumard, T. Shimizu, T. Stolker, V. Christiaens, V. Coud\\'e du Foresto, V. Lapeyr\\`ere, W. Brandner, X. Haubois, Y. Cl\\'enet, Z. Hubert, Z. Rustamkulov","submitted_at":"2021-06-15T15:59:37Z","abstract_excerpt":"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. 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, we include additional extinction by high-altitude dust clouds made of enstatite grains in the atmospheric model fits. We also infer the orbital parameters of HD 206893 B by combining the $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2106.08249","kind":"arxiv","version":1},"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/2106.08249/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"}