Parametric Study of Proton-Capture Nucleosynthesis of 27Al via the Extended Ne – Al Chain

Parametric Study of Proton-Capture Nucleosynthesis of 27Al via the Extended Ne – Al Chain | 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 Parametric Study of Proton-Capture Nucleosynthesis of 27 Al via the Extended Ne – Al Chain Deva Pratim Mahanta, Apurba Talukdar, Swapnajyoti Sarma, Mrinmay Medhi, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9495756/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 6 You are reading this latest preprint version Abstract We present a parametric investigation of proton-capture reactions within the extended Neon–Sodium–Magnesium–Aluminum (Ne–Al) nuclear reaction network, with particular emphasis on the production of 27 Al. The study explores the sensitivity of aluminum synthesis to temperature conditions in the range T 9 = 0.02–0.10 at a fixed density of 100 g cm -3 . The calculations are performed using a single-zone nuclear reaction network with simplified initial abundance assumptions, including an idealized uniform distribution of selected isotopes to probe reaction pathways. The nuclear network is solved numerically to obtain the evolution and quasi-equilibrium mass fractions of the involved species. The results demonstrate that the extended chain Ne - Al can efficiently produce 27 Al within the temperature range explored, with the final abundances showing a systematic dependence on the temperature and reaction flow characteristics. A statistical comparison with representative observational abundance datasets yields a correlation coefficient exceeding 0.85 and a mean absolute deviation (MAD) of 0.40 dex, indicating that the model captures general abundance trends despite its simplified assumptions. This work does not incorporate a full stellar evolution model or transport processes such as mixing and diffusion. Therefore, the results should be interpreted as indicative of nuclear reaction pathways and sensitivities,rather than direct predictions of stellar surface abundances. The study provides insight into the role of proton-capture processes in shaping intermediate-mass element synthesis under controlled thermodynamic conditions. Nucleosynthesis H- burning Metallicity Abundances Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 29 Apr, 2026 Reviewers agreed at journal 29 Apr, 2026 Reviewers invited by journal 27 Apr, 2026 Editor assigned by journal 27 Apr, 2026 Submission checks completed at journal 25 Apr, 2026 First submitted to journal 22 Apr, 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-9495756","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":630367373,"identity":"c2e13a37-bc97-4cb4-8f77-b88a355ec269","order_by":0,"name":"Deva Pratim 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Chain\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"astrophysics-and-space-science","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"astr","sideBox":"Learn more about [Astrophysics and Space Science](https://www.springer.com/journal/10509)","snPcode":"10509","submissionUrl":"https://submission.nature.com/new-submission/10509/3","title":"Astrophysics and Space Science","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Nucleosynthesis, H- burning, Metallicity, Abundances","lastPublishedDoi":"10.21203/rs.3.rs-9495756/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9495756/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eWe present a parametric investigation of proton-capture reactions within the extended Neon–Sodium–Magnesium–Aluminum (Ne–Al) nuclear reaction network, with particular emphasis on the production of \u003csup\u003e27\u003c/sup\u003eAl. The study explores the sensitivity of aluminum synthesis to temperature conditions in the range T\u003csub\u003e9\u003c/sub\u003e = 0.02–0.10 at a fixed density of 100 g cm\u003csup\u003e-3\u003c/sup\u003e. The calculations are performed using a single-zone nuclear reaction network with simplified initial abundance assumptions, including an idealized uniform distribution of selected isotopes to probe reaction pathways. The nuclear network is solved numerically to obtain the evolution and quasi-equilibrium mass fractions of the involved species. The results demonstrate that the extended chain Ne - Al can efficiently produce \u003csup\u003e27\u003c/sup\u003eAl within the temperature range explored, with the final abundances showing a systematic dependence on the temperature and reaction flow characteristics. 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