The multiple nature of CC Com: One of the ultra-short orbital period late-type contact binary systems

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dc.authorid0000-0002-3000-9829
dc.contributor.authorKocak, Dolunay
dc.date.accessioned2025-05-07T12:53:15Z
dc.date.available2025-05-07T12:53:15Z
dc.date.issued2024
dc.departmentEge Üniversitesi, Fen Fakültesi, Astronomi ve Uzay Bilimleri Bölümü
dc.description.abstractThe study of very short-period contact binaries provides an important laboratory in which the most important and problematic astrophysical processes of stellar evolution take place. Short-period contact systems, such as CC Com, are particularly important for binary evolution. Close binary systems, especially those with multiple system members, have significant period variations, angular momentum loss mechanisms predominance, and pre-merger stellar evolution, making them valuable astrophysical laboratories. In this study, observations of CC Com, previously reported as a binary system, and new observations from the T & Uuml;B & Idot;TAK National Observatory (TUG) and the space-based telescope TESS have revealed that there is a third object with a period of about eight years and a fourth object with a period of about a century orbiting the binary system. From simultaneous analysis of all available light curves and radial velocities, the sensitive orbital and physical parameters of the system components are derived. The orbital parameters of the components are PA=0.2206868 +/- 0.0000002 days,P-B=7.9 +/- 0.1 yr, P-C=98 +/- 5yr,e3=0.06,e4=0.44 and the physical parameters as M-A1=0.712 +/- 0.009 M-circle dot,M-A2=0.372 +/- 0.005 M-circle dot,m(B;i ')=90 degrees=0.074 M-circle dot,m(C;i ')=90 degrees=0.18 M-circle dot,R-A1=0.693 +/- 0.006 R-circle dot,R-A2=0.514 +/- 0.005 R-circle dot,L-A1=0.103 L-circle dot,L-A2=0.081 L-circle dot. Finally, theevolutionary status of the multiple system CC Com and its component stars is discussed
dc.identifier.citationKocak, D. (2024). The multiple nature of CC com: One of the ultra-short orbital period late-type contact binary systems. Publications of the Astronomical Society of Australia, 41
dc.identifier.doi10.1017/pasa.2024.78
dc.identifier.endpage7
dc.identifier.issn1323-3580
dc.identifier.issueSep
dc.identifier.scopus2-s2.0-85206314135
dc.identifier.scopusqualityQ1
dc.identifier.startpage1
dc.identifier.urihttps://doi.org/10.1017/pasa.2024.78
dc.identifier.urihttps://hdl.handle.net/11454/117213
dc.identifier.volume41
dc.identifier.wosWOS:001321117200001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorKocak, Dolunay
dc.institutionauthorid0000-0002-3000-9829
dc.language.isoen
dc.publisherCambridge University Press
dc.relation.ispartofPublications of the Astronomical Society of Australia
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subject(stars:) Binaries (including multiple): close
dc.subjectmethods: observational
dc.subjectstars: evolution
dc.subjecttechniques: photometric
dc.subjecttechniques: radial velocities
dc.titleThe multiple nature of CC Com: One of the ultra-short orbital period late-type contact binary systems
dc.typeArticle

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