An effective double-layer stellar structure

An effective double-layer stellar structure | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article An effective double-layer stellar structure K. Campos, J. Andrade, O. F. Bustos, D. Santana This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8713983/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 7 You are reading this latest preprint version Abstract A physically viable anisotropic double-layer structure compatible with the description of an effective double-layer stellar structure is constructed. For this aim, Einstein’s field equations of gravity for an anisotropic fluid joined to a linear equation of state related to quark matter and a quadratic equation of state related to exotic matter have been used to model the core and the envelope, respectively. Our findings reveal that this structure satisfies the dominant and strong energy conditions for an acceptable gravitational source, as well as having high stability with respect to the Harrison–Zeldovich–Novikov criterion, convection motion, gravitational cracking, and anti-collapse criteria. In this sense, this model can serve as a basis for later theoretical extensions, such as including electric charge, or, why not,the influence of the cosmological constant. Stellar layer core envelope interior solution Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 18 Mar, 2026 Reviews received at journal 17 Mar, 2026 Reviewers agreed at journal 23 Feb, 2026 Reviewers invited by journal 10 Feb, 2026 Editor assigned by journal 06 Feb, 2026 Submission checks completed at journal 06 Feb, 2026 First submitted to journal 27 Jan, 2026 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-8713983","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":588861450,"identity":"da6c21e2-564d-4e48-a0f1-e19f3874ad7b","order_by":0,"name":"K. Campos","email":"","orcid":"","institution":"Escuela Superior Politécnica de Chimborazo","correspondingAuthor":false,"prefix":"","firstName":"K.","middleName":"","lastName":"Campos","suffix":""},{"id":588861451,"identity":"bb624cff-d182-4684-b5da-a1b4c18c6bf4","order_by":1,"name":"J. 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