{"paper":{"title":"Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of $\\alpha$ Cen A. I. Observations, Orbital and Physical Properties, and Exozodi Upper Limits","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Aniket Sanghi, Anthony Boccaletti, Billy Quarles, Charles Beichman, Dean Hines, Dimitri Mawet, Edward Fomalont, Elodie Choquet, Eugene Serabyn, Jack J. Lissauer, James Mang, Jarron Leisenring, Jonathan Aguilar, Jorge Llop-Sayson, Kevin Wagner, Laurent Pueyo, Mantas Zilinskas, Marie Ygouf, Mark Wyatt, Max Sommer, Michael Ressler, Nicolas Godoy, Pascal Tremblin, Pierre Kervella, Pierre-Olivier Lagage, Rachel Akeson, Renyu Hu, Ruslan Belikov, Thomas Henning, William O. Balmer","submitted_at":"2025-08-05T18:01:46Z","abstract_excerpt":"We report on coronagraphic observations of the nearest solar-type star, $\\alpha$ Cen A, using the MIRI instrument on the James Webb Space Telescope. With three epochs of observation (August 2024, February 2025, and April 2025), we achieve a sensitivity sufficient to detect $T_{\\rm eff}\\approx$ 225-250 K (1-1.2 $R_{\\rm Jup}$) planets between 1\"-2\" and exozodiacal dust emission at the level of $>$5-8$\\times$ the brightness of our own zodiacal cloud. The lack of exozodiacal dust emission sets an unprecedented limit of a few times the brightness of our own zodiacal cloud$-$a factor of $\\gtrsim$10 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.03814","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/2508.03814/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"}