![\"The](\"https:\/\/www.newsbeep.com\/ie\/wp-content\/uploads\/2026\/04\/The-CARMENES-Search-For-Exoplanets.jpg\")
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\n Planet orbiting a red dwarf \u2014 Grok via Astrobiology.com\n <\/p>\n
Stellar rotation is closely linked to both age and magnetic activity. Through gyrochronology, it provides a means to estimate stellar ages and trace the evolution of planetary systems, and it is also crucial to constrain and correct stellar activity effects for robust exoplanet detection and characterisation.<\/p>\n
CARMENES is a dual-channel, high-resolution (R > 80000) spectrograph that has been highly successful in detecting exoplanets around M-dwarf stars using the radial-velocity technique, and it also enables precise measurements of the projected rotational velocity (vsini) from spectral line broadening.<\/p>\n
We present an oversampled convolution method incorporating a realistic limb-darkening model to determine vsini from CARMENES spectra by comparing observed spectra with that of a template star.<\/p>\n
The advantages over existing methods in the literature have been assessed using high-resolution synthetic spectra spanning effective temperatures of 2500-4000 K and projected rotational velocities of up to 50 km\/s. Applied to 392 M dwarfs observed with CARMENES, our method yields vsini measurements (or upper limits at 2 km\/s) with a median relative uncertainty of 6.8%, substantially smaller than the 15.4% reported in the literature.<\/p>\n
This work provides the largest uniform catalogue of vsini measurements for M dwarfs, including significantly updated values for several targets, along with 36 new targets.<\/p>\n
R. Varas, G. Morello, M. Zechmeister, P. J. Amado, F. J. Pozuelos, J. A. Caballero, A. Claret, C. Cifuentes, R. Morales, A. Quirrenbach, A. Reiners, I. Ribas, V. J. S. B\u00e9jar, M. Cort\u00e9s-Contreras, A. P. Hatzes, Th. Henning, I. Hermelo, H. L. Ruh, A. Schweitzer, H. M. Tabernero, M. R. Zapatero Osorio<\/p>\n
Comments: 12 pages, 16 figures, 4 tables. Accepted for publication in A&A Astrobiology, Exoplanet,<\/p>\n","protected":false},"excerpt":{"rendered":"Planet orbiting a red dwarf \u2014 Grok via Astrobiology.com Stellar rotation is closely linked to both age and…\n","protected":false},"author":2,"featured_media":412197,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[145160,180903,910,180904,179282,179283,61,60,148631,82,180905],"class_list":{"0":"post-412196","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-astro-ph-ep","9":"tag-carmenes","10":"tag-exoplanet","11":"tag-gyrochronology","12":"tag-https-astrobiology-com-2026-04-astronomy","13":"tag-https-astrobiology-com-2026-04-imaging","14":"tag-ie","15":"tag-ireland","16":"tag-m-dwarf","17":"tag-science","18":"tag-spectorscopy"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/412196","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/comments?post=412196"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/posts\/412196\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media\/412197"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/media?parent=412196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/categories?post=412196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ie\/wp-json\/wp\/v2\/tags?post=412196"}],"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:2604.15428 [astro-ph.SR] (or arXiv:2604.15428v1 [astro-ph.SR] for this version)
https:\/\/doi.org\/10.48550\/arXiv.2604.15428<\/a>
Focus to learn more
Submission history
From: Roberto Varas Gonz\u00e1lez
[v1] Thu, 16 Apr 2026 18:00:01 UTC (317 KB)
https:\/\/arxiv.org\/abs\/2604.15428<\/a><\/p>\n