{"paper":{"title":"First JWST thermal phase curves of temperate terrestrial exoplanets reveal no thick atmosphere around TRAPPIST-1 b and c","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Aaron Householder, Achr\\`ene Dyrek, Aishwarya Iyer, Alexandre Revol, Alice Maurel, Andrew Lincowski, Benjamin Charnay, Billy Edwards, Brice-Olivier Demory, Chuanfei Dong, Daniel D.B. Koll, David Berardo, Elsa Ducrot, Emeline Bolmont, Eric Agol, Franck Selsis, Jacob Lustig-Yaeger, J\\'er\\'emy leconte, Julien de Wit, Laetita Delre, Laura Kreidberg, Martin Turbet, Micha\\\"el Gillon, Nicolas Iro, Pierre-Olivier Lagage, Renyu Hu, Sebastian Zieba, Taylor J. Bell, Thomas J. Fauchez, Thomas P. Greene, Victoria S. Meadows, Xintong Lyu, Ziyu Huang","submitted_at":"2025-09-02T09:23:03Z","abstract_excerpt":"We report JWST/MIRI 15 $\\mu$m phase curves of TRAPPIST-1 b and c, revealing thermal emission consistent with their irradiation levels, assuming no efficient heat redistribution. We find that TRAPPIST-1 b shows a high dayside brightness temperature (490 $\\pm$ 17 K), no significantly detectable nightside emission ($F_{\\rm b, Night, max}$ = $39_{-27}^{+55}$ ppm), and no phase offset -- features consistent with a low-albedo, airless ultramafic rocky surface. TRAPPIST-1 c exhibits a lower dayside brightness temperature (369 $\\pm$ 23 K), and a nightside flux statistically indistinguishable from that"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.02128","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/2509.02128/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"}