{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/simulations-of-astrometric-planet-detection","title":"Simulations of astrometric planet detection in Alpha Centauri by intensity interferometry","arxiv_id":"2205.06517","date":"2022-05-13","proceeding":null,"authors":["Km Nitu Rai","Subrata Sarangi","Prasenjit Saha","Soumen Basak"],"abstract":"Recent dynamical studies indicate that the possibility of an Earth-like planet around $\\alpha\\;$Cen A or B should be taken seriously. Such a planet, if it exists, would perturb the orbital astrometry by $<10 \\ {\\mu}\\rm as$, which is $10^{-6}$ of the separation between the two stars. We assess the feasibility of detecting such perturbations using ground-based intensity interferometry. We simulate a dedicated setup consisting of four 40-cm telescopes equipped with photon counters and correlators with time resolution $0.1\\,\\rm ns$, and a sort of matched filter implemented through an aperture mask. The astrometric error from one night of observing $\\alpha\\;$Cen AB is $\\approx0.5\\,\\rm mas$. The error decreases if longer observing times and multiple spectral channels are used, as $(\\hbox{channels}\\times\\hbox{nights})^{-1/2}$.","url_abs":"https://arxiv.org/abs/2205.06517v2","url_pdf":"https://arxiv.org/pdf/2205.06517v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"simulations-of-astrometric-planet-detection","repo_url":"https://github.com/niturai/AlphaCentauri","is_official":1,"mentioned_in_paper":0,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}