{"paper":{"title":"Are these planets or brown dwarfs? Broadly solar compositions from high-resolution atmospheric retrievals of ~10-30 $M_\\textrm{Jup}$ companions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Andrew Skemer, Ashley Baker, Benjamin Calvin, Ben Sappey, Chih-Chun Hsu, Daniel Echeverri, Dimitri Mawet, Eric E. Mamajek, Evan Morris, Geoffrey A. Blake, Greg Doppmann, Heather A. Knutson, Jacklyn Pezzato, Jacques-Robert Delorme, James K. Wallace, Jason J. Wang, Jean-Baptiste Ruffio, Jerry W. Xuan, Ji Wang, Joshua Liberman, Julie Inglis, Katelyn Horstman, Luke Finnerty, Marta L. Bryan, Michael P. Fitzgerald, Neda Hejazi, Nemanja Jovanovic, Nicole L. Wallack, Paul Molli\\`ere, Randall Bartos, Ronald A. L\\'opez, Shubh Agrawal, Sylvain Cetre, Tobias Schofield, Yapeng Zhang","submitted_at":"2024-05-21T18:02:40Z","abstract_excerpt":"Using Keck Planet Imager and Characterizer (KPIC) high-resolution ($R$~35000) spectroscopy from 2.29-2.49 $\\mu$m, we present uniform atmospheric retrievals for eight young substellar companions with masses of ~10-30 $M_\\textrm{Jup}$, orbital separations spanning ~50-360 au, and $T_\\textrm{eff}$ between ~1500-2600 K. We find that all companions have solar C/O ratios, and metallicities, to within the 1-2$\\sigma$ level, with the measurements clustered around solar composition. Stars in the same stellar associations as our systems have near-solar abundances, so these results indicate that this pop"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2405.13128","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/2405.13128/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"}