![\"Asteroseismic](\"https:\/\/www.europesays.com\/ie\/wp-content\/uploads\/2026\/05\/Asteroseismic-Modelling.png\")
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\n Hertzsprung-Russell diagram of the stellar catalogue. The Sun is shown as a reference and the letters stand for the spectral type. The grey lines represent evolutionary tracks of the Spelaion grid selected by fixing the initial chemical composition to X0 = 0.72 and Z0 = 0.018, and setting \u03b1ov = 0. \u2013 astro-ph.SR <\/p>\n
We present detailed asteroseismic modelling of 95 main-sequence solar-like stars and Kepler exoplanet host stars using the FICO procedure, a three-step method that combines forward and inverse techniques that enables precise inference of fundamental stellar parameters such as mass, radius, age, and mean density.<\/p>\n
We applied the FICO procedure to a catalogue of stars with high-quality asteroseismic and classical observations, and compared its results against literature values. We also compared its performance with direct frequency fitting using semi-empirical surface corrections.<\/p>\n
The FICO procedure achieved statistical precisions of 2.3%, 0.82%, 6.9%, and 0.49% in mass, radius, age, and mean density, respectively on average, well within PLATO quality requirements.<\/p>\n
We reconfirmed that surface-independent methods more effectively mitigate biases inherent to semi-empirical surface corrections, particularly for stars more massive than 1.15 Msun or above 6050 K. Two regimes were identified: near-solar conditions, where both approaches perform similarly, and higher-mass stars, where surface-independent methods consistently outperform direct fitting methods.<\/p>\n
While our results are consistent with literature values, we observed age biases (~11.5% on average for the Kepler LEGACY sample) that are comparable to the PLATO accuracy requirement of 10% for a Sun-like star, and therefore not negligible in that context. The FICO procedure provides a robust framework for high-precision stellar characterisation in the PLATO era.<\/p>\n
Its hybrid architecture effectively addresses surface effects, making it a promising tool for the accurate determination of exoplanet host-star properties. Our findings also highlight the importance of carefully selecting and validating the physical assumptions embedded in stellar models, particularly in the context of next-generation space missions such as PLATO.<\/p>\n
J\u00e9r\u00f4me B\u00e9trisey, Daniel R. Reese, Camilla Pezzotti, Marie-Jo Goupil, Margarida S. Cunha<\/p>\n
Comments: Accepted for publication in Astronomy and Astrophysics Astrobiology, Stellar Cartography,<\/p>\n","protected":false},"excerpt":{"rendered":"Hertzsprung-Russell diagram of the stellar catalogue. The Sun is shown as a reference and the letters stand for…\n","protected":false},"author":2,"featured_media":464276,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[77],"tags":[203953,18,18060,203955,71388,11511,203954,203956,19,17,57790,203957,133,17097,184540,22916],"class_list":{"0":"post-464275","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-asteroseismology","9":"tag-eire","10":"tag-exoplanet","11":"tag-fico","12":"tag-habitability","13":"tag-heliophysics","14":"tag-https-astrobiology-com-2026-05-astronomy","15":"tag-https-astrobiology-com-2026-05-imaging","16":"tag-ie","17":"tag-ireland","18":"tag-kepler","19":"tag-main-sequence","20":"tag-science","21":"tag-spectroscopy","22":"tag-stellar-cartography","23":"tag-sun-like-star"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@ie\/116502764431525865","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts\/464275","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/comments?post=464275"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/posts\/464275\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/media\/464276"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/media?parent=464275"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/categories?post=464275"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ie\/wp-json\/wp\/v2\/tags?post=464275"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Subjects: Solar and Stellar Astrophysics (astro-ph.SR); Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2604.27842 [astro-ph.SR] (or arXiv:2604.27842v1 [astro-ph.SR] for this version)
https:\/\/doi.org\/10.48550\/arXiv.2604.27842<\/a>
Focus to learn more
Submission history
From: J\u00e9r\u00f4me B\u00e9trisey
[v1] Thu, 30 Apr 2026 13:28:30 UTC (1,939 KB)
https:\/\/arxiv.org\/abs\/2604.27842<\/a><\/p>\n