{"paper":{"title":"A compact multi-planet system transiting HIP 29442 (TOI-469) discovered by TESS and ESPRESSO. Radial velocities lead to the detection of transits with low signal-to-noise ratio","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Castro-Gonz\\'alez, A. Mehner, A. Sozzetti, A. Su\\'arez Mascare\\~no, A. W. Mann, B. Lavie, C. Allende Prieto, C. Brice\\~no, C. J. A. P. Martins, C. Lovis, C. Ziegler, D. Bossini, D. Ehrenreich, D. R. Ciardi, E. C. Matthews, E. Delgado Mena, E. J. Gonzales, E. Palle, E. Poretti, F. Bouchy, F. Pepe, G. Lo Curto, G. Micela, H. Osborn, J. A. Egger, J. Davoult, J. Dou, J. E. Owen, J. E. Schlieder, J. Faria, J. I. Gonz\\'alez Hern\\'andez, J. Lillo-Box, J. Rodrigues, M. Damasso, M. R. Zapatero Osorio, N. C. Santos, N. J. Nunes, N. Law, P. Di Marcantonio, P. Figueira, P. J. Carter, P. Molaro, P. Sossi, R. G\\'enova Santos, R. Rebolo, S. Benatti, S. C. C. Barros, S. Cristiani, S. G. Sousa, S. Udry, V. Adibekyan, V. D'Odorico, X. Dumusque, Y. Alibert, Z. Leinhardt","submitted_at":"2023-08-25T11:22:43Z","abstract_excerpt":"We followed-up with ESPRESSO the K0V star HIP 29442 (TOI-469), already known to host a validated sub-Neptune companion TOI-469.01. We aim to verify the planetary nature of TOI-469.01. We modelled radial velocity and photometric time series to measure the dynamical mass, radius, and ephemeris, and to characterise the internal structure and composition of TOI-469.01. We confirmed the planetary nature of TOI-469.01. Thanks to ESPRESSO we discovered two additional close-in companions. We also detected their low signal-to-noise transit signals in the TESS light curve. HIP 29442 is a compact multi-p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.13310","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/2308.13310/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"}