[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-269030-105":3,"detail-sidebar-cat-0-en-105":81,"doc-detail-269030-en":131},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":74,"head_meta":76,"extra_data":78,"updated_unix":80},105,"en","numerical-simulations-of-dark-matter-admixed-neutron-star-binaries","Numerical Simulations of Dark Matter Admixed Neutron Star Binaries","","Multi-messenger observations of compact binary mergers offer a route to constraining dark matter that could accumulate inside and around neutron stars. The study extends a numerical-relativity framework (BAM) to simulate neutron stars with an additional mirror dark matter component, validating the approach via single-star tests and first binary neutron-star runs. The results show dark matter shortens the merger remnant lifetime, promotes prompt black-hole collapse, alters merger times at fixed mass and mass ratio, and makes electromagnetic counterparts dim compared with dark-matter-free cases, supporting future multi-messenger probing.",{"@graph":14,"@context":73},[15,34,56],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/numerical-simulations-of-dark-matter-admixed-neutron-star-binaries/269030/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/numerical-simulations-of-dark-matter-admixed-neutron-star-binaries/269030.png","ImageObject",300,407,{"name":42,"@type":43},"Bintang","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-24","2026-09-15",true,{"@type":52,"interactionType":53,"userInteractionCount":55},"InteractionCounter",{"@type":54},"ViewAction",14,{"@type":57,"mainEntity":58},"FAQPage",[59,65,69],{"name":60,"@type":61,"acceptedAnswer":62},"What is the main goal of the study on dark matter–admixed neutron star binaries?","Question",{"text":63,"@type":64},"To extend numerical-relativity simulations to include a mirror dark matter component in neutron stars and assess how that affects merger dynamics and observables.","Answer",{"name":66,"@type":61,"acceptedAnswer":67},"How does the presence of dark matter influence the merger remnant’s fate?",{"text":68,"@type":64},"It reduces the lifetime of the merger remnant and favors a prompt collapse to a black hole.",{"name":70,"@type":61,"acceptedAnswer":71},"Do dark matter–admixed mergers produce electromagnetic signals comparable to dark-matter-free systems?",{"text":72,"@type":64},"They are very unlikely to be as bright as counterparts without dark matter, implying weaker electromagnetic signatures.","https://schema.org",{"og:url":32,"og:type":75,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":77,"canonical":32},"index,follow",{"doc_id":79,"site_id":7},269030,1789442345,{"code":4,"msg":82,"data":83},"success",[84,88,92,96,101,106,111,115,120,123,127],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":85,"show_sort_weight":86,"slug":87},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":89,"show_sort_weight":90,"slug":91},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":93,"show_sort_weight":94,"slug":95},"Exam",70,"exam",{"id":97,"doc_module":4,"doc_module_name":25,"category_name":98,"show_sort_weight":99,"slug":100},5,"Comic",60,"comic",{"id":102,"doc_module":4,"doc_module_name":25,"category_name":103,"show_sort_weight":104,"slug":105},6,"Technology",50,"technology",{"id":107,"doc_module":4,"doc_module_name":25,"category_name":108,"show_sort_weight":109,"slug":110},7,"Healthcare",40,"healthcare",{"id":112,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":113,"slug":114},8,30,"research-report",{"id":116,"doc_module":4,"doc_module_name":25,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":25,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":124,"doc_module":4,"doc_module_name":25,"category_name":125,"show_sort_weight":124,"slug":126},10,"Lifestyle","lifestyle",{"id":128,"doc_module":4,"doc_module_name":25,"category_name":129,"show_sort_weight":97,"slug":130},19,"General","general",{"code":4,"msg":82,"data":132},{"doc_id":79,"user_id":133,"nickname":42,"user_avatar":134,"doc_module":4,"category_id":112,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":135,"file_id":136,"file_url":137,"file_type":138,"file_size":139,"view_count":55,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":55,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":80,"read_time":144,"preview_page_count":4},962085564381,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","Article  \nNumerical Simulations of Dark Matter Admixed Neutron Star Binaries  \nMattia Emma 1, *, Federico Schianchi 1, Francesco Pannarale 2,3, Violetta Sagun 4 and Tim Dietrich 1,5  \nCitation: Emma, M.; Schainchi, F.; Pannarale, F.; Sagun, V.; Dietrich, T. Numerical Simulations of Dark Matter Admixed Neutron Star Binaries. Particles 2022, 5, 273–286 .  \n[https://doi.org/10.3390/](https://doi.org/10.3390/)[ ](https://doi.org/10.3390/)particles5030024  \nAcademic Editors: Valery E. Lyubovitskij, Dmitry V. Kirpichnikovand Alexey S. Zhevlakov  \nReceived: 21 June 2022  \nAccepted: 17 July 2022  \nPublished: 22 July 2022  \nPublisher's Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.  \nCopyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ([https://](https://)[ ](https://)[creativecommons.org/licenses/by/](creativecommons.org/licenses/by/)[ ](creativecommons.org/licenses/by/)[4.0/](4.0/)) .  \n1 Institut für Physik und Astronomie, Universität Potsdam, Haus 28, 14476 Potsdam, Germany;  \nfederico.schianchi@uni-potsdam.de (F.S.); [tim.dietrich@uni-potsdam.de](tim.dietrich@uni-potsdam.de) (T.D.)  \n2 Dipartimento di Fisica, Università di Roma “Sapienza”, Piazzale A. Moro 5, I-00185 Roma, Italy; [francesco.pannarale@uniroma1.it](francesco.pannarale@uniroma1.it)  \n3 INFN Sezione di Roma, Piazzale A. Moro 5, I-00185 Roma, Italy  \n4 CFisUC, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal; [violettasagun@tecnico.ulisboa.pt](violettasagun@tecnico.ulisboa.pt)  \n5 Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Am Mühlenberg 1,  \n14476 Potsdam, Germany  \n* Correspondence: mattia.emma@uni-potsdam.de  \nAbstract: Multi-messenger observations of compact binary mergers provide a new way to constrainthe nature of dark matter that may accumulate in and around neutron stars. In this article, we extend the infrastructure of our numerical-relativity code BAM to enable the simulation of neutron stars that contain an additional mirror dark matter component. We perform single star tests to verify our code and the first binary neutron star simulations of this kind. We find that the presence of dark matter reduces the lifetime of the merger remnant and favors a prompt collapse to a black hole. Furthermore, we find differences in the merger time for systems with the same total mass and mass ratio, but different amounts of dark matter. Finally, we find that electromagnetic signals produced by the merger of binary neutron stars admixed with dark matter are very unlikely to be as bright as their dark matter-free counterparts. Given the increased sensitivity of multi-messenger facilities, our analysis gives a new perspective on how to probe the presence of dark matter.  \nKeywords: numerical relativity; dark matter; neutron stars; equation of state; gravitational-wave astronomy; multi-messenger astrophysics  \n1. Introduction  \nNeutron stars, which are among the densest and most compact astrophysical objects, enable studies of the properties of strongly interacting matter under extreme conditions. In this regard, the first detection of the gravitational-wave (GW) signal emitted by a binary neutron star coalescence [1] and of its associated electromagnetic counterparts [2,3] mark anew era in GW and multi-messenger astronomy, disciplines that will further improve our understanding of matter at supranuclear densities.  \nExtracting the source properties of the binary from the observational data requires accurate theoretical models of the last stages of the binary coalescence. Due to the complexity of the equations governing general relativity and relativistic fluids, these can only be achieved with the aid of numerical-relativity simulations; cf. [4–6] for textbook discussions and further references. While these simulations have und","cbCaipIuhkPJkWAG","https://ap.wps.com/l/cbCaipIuhkPJkWAG","pdf",1984030,"English","# Introduction\n## Motivation: multi-messenger constraints on dark matter\n## Why numerical-relativity simulations are needed\n## How dark matter may affect merger dynamics\n## Impact on gravitational-wave and electromagnetic observables","[{\"question\":\"What is the main goal of the study on dark matter–admixed neutron star binaries?\",\"answer\":\"To extend numerical-relativity simulations to include a mirror dark matter component in neutron stars and assess how that affects merger dynamics and observables.\"},{\"question\":\"How does the presence of dark matter influence the merger remnant’s fate?\",\"answer\":\"It reduces the lifetime of the merger remnant and favors a prompt collapse to a black hole.\"},{\"question\":\"Do dark matter–admixed mergers produce electromagnetic signals comparable to dark-matter-free systems?\",\"answer\":\"They are very unlikely to be as bright as counterparts without dark matter, implying weaker electromagnetic signatures.\"}]","Numerical Simulations of Dark Matter Admixed Neutron Star Binaries | PDF",35]