{"paper":{"title":"Ariel stellar characterisation IV. Fundamental parameters of 18 hot stars in the Ariel mission candidate sample","license":"http://creativecommons.org/licenses/by/4.0/","headline":"A uniform determination of fundamental parameters for 18 hot stars extends mass-metallicity-planetary radius correlations to early-type hosts for the Ariel mission.","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"A. Lehtmets, C. Danielski, C. P. Folsom, D. Bossini, D. Turrini, E. Siimon, H. Ramler, K. Biazzo, K. G. He{\\l}miniak, L. Magrini, M. Benito, M. Kama, M. Rainer, M. Tsantaki, N. Moedas, R. Da Silva, S. Benatti, S. P. D. Borthakur, V. Mitrokhina","submitted_at":"2026-05-12T18:32:34Z","abstract_excerpt":"The characterisation of exoplanetary systems depends on the accurate determination of host star parameters. The Ariel mission will probe the atmospheres of a statistically significant sample of exoplanets, and so requires a precise characterisation of the stellar properties well before its launch in 2029. The homogeneous determination of stellar parameters for Ariel will enable both the optimisation of the final target list and set roots for a reliable interpretation of the formation and evolution of planetary systems. Such a homogeneous characterisation has thus far only been carried out for "},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We derived effective temperatures, surface gravities, projected rotational velocities, microturbulent velocities, overall metallicities, iron abundances, stellar masses, and radii for our sample of 18 hot stars. Building on our previous work on FGK host stars, we show that correlations between stellar mass, metallicity, and planetary radii also extend to early-type stars.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The iterative spectro-trigonometric approach optimised for high-temperature stars produces accurate parameters when model atmospheres and evolutionary tracks are combined with photometry-based radii.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Uniform spectro-trigonometric parameters for 18 hot Ariel candidate stars show that mass-metallicity-planetary radius correlations extend to early-type hosts.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A uniform determination of fundamental parameters for 18 hot stars extends mass-metallicity-planetary radius correlations to early-type hosts for the Ariel mission.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"f43ed7328479f0ee4eca297bb4c023260e49c853e2882f6218814738db6b33b0"},"source":{"id":"2605.12644","kind":"arxiv","version":1},"verdict":{"id":"31ab9181-27d9-42c2-8051-4ed2063a3a37","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T20:12:54.498283Z","strongest_claim":"We derived effective temperatures, surface gravities, projected rotational velocities, microturbulent velocities, overall metallicities, iron abundances, stellar masses, and radii for our sample of 18 hot stars. Building on our previous work on FGK host stars, we show that correlations between stellar mass, metallicity, and planetary radii also extend to early-type stars.","one_line_summary":"Uniform spectro-trigonometric parameters for 18 hot Ariel candidate stars show that mass-metallicity-planetary radius correlations extend to early-type hosts.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The iterative spectro-trigonometric approach optimised for high-temperature stars produces accurate parameters when model atmospheres and evolutionary tracks are combined with photometry-based radii.","pith_extraction_headline":"A uniform determination of fundamental parameters for 18 hot stars extends mass-metallicity-planetary radius correlations to early-type hosts for the Ariel mission."},"references":{"count":16,"sample":[{"doi":"","year":2021,"title":"arXiv , author =:1809.04897 , file =","work_id":"de266348-19c4-4267-94f2-14db0a381a03","ref_index":1,"cited_arxiv_id":"1809.04897","is_internal_anchor":true},{"doi":"","year":2023,"title":"A dominant subsolar–antisolar wind circula- tion pattern has been suggested","work_id":"e2b35271-d452-42a3-870a-2b8da79d421d","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2061,"title":"HATS-70 b 0.0363±0.0007 12.9±1.8 1.38±0.08 2730±160 - HATS-70 b is more likely a brown dwarf than a planet. (Zhou et al. 2019a) HD 2685 b 0.0568±0.0006 1.17±0.12 1.44±0.05 2061 – The coolest host star","work_id":"809ff425-8b05-40fb-8f6c-3face7ba2ca0","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2087,"title":"The planetary orbit is strongly misaligned (projected spin–orbit angleλ∼84 ◦)","work_id":"d92f5f65-0492-455f-8bd7-923c927e6578","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2017,"title":"The system exhibits a near-perfect spin–orbit alignment (3.4◦ ±2.1 ◦)","work_id":"530acf0e-9e98-4efe-ab1e-09f5274d6fd5","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":16,"snapshot_sha256":"1c1755f0f7d3d7bc7d89f9adef969ed46b77c89697c7aed040fded2ad4b4b4ce","internal_anchors":1},"formal_canon":{"evidence_count":2,"snapshot_sha256":"5f16f82a014d5647c1134cb9c69ce3a4fca3a3b7550cabee19b85da1d9df8517"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}