BSN: Photometric Light Curve Analysis of Two Contact Binary Systems LS Del and V997 Cyg

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dc.authoridPoro, Atila/0000-0002-0196-9732
dc.authoridZavvarei, Shayan/0009-0002-2937-9053
dc.authoridAzarara, Hossein/0009-0003-2631-6329
dc.authoridBaudart, Sabrina/0009-0004-8426-4114
dc.authoridSarvari, Elham/0009-0006-1033-5885
dc.contributor.authorPoro, Atila
dc.contributor.authorTanrıver, Mehmet
dc.contributor.authorSarvari, Elham
dc.contributor.authorZavvarei, Shayan
dc.contributor.authorAzarara, Hossein
dc.contributor.authorCorp, Laurent
dc.contributor.authorBaudart, Sabrina
dc.date.accessioned2025-01-27T20:14:09Z
dc.date.available2025-01-27T20:14:09Z
dc.date.issued2024
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe light curve analyses and orbital period variations for two contact binary stars, LS Del and V997 Cyg, were presented in this work which was conducted in the frame of the Binary Systems of South and North (BSN) Project. Ground-based photometric observations were performed at two observatories in France. We used the TESS (Transiting Exoplanet Survey Satellite) data for extracting times of minima and light curve analysis of the target systems. The O-C diagram for both systems displays a parabolic trend. LS Del and V997 Cyg's orbital periods are increasing at a rate of dP/dt = 7.20 x 10 (-08) d yr( -1) and dP/dt = 2.54 x 10 (-08) d yr (-1 ), respectively. Therefore, it can be concluded that the mass is being transferred from the less massive star to the more massive component with a rate of dM/dt = -1.96 x 10( -7) M- circle dot yr( -1) for the LS Del system, and dM/dt = -3.83 x 10 (-7) M- circle dot yr (-1) for V997 Cyg. The parameters of the third possible object in the system were also considered. 2 Poro et al. The PHysics Of Eclipsing BinariEs (PHOEBE) Python code was used to analyze the light curves. The light curve solutions needed a cold starspot due to the asymmetry in the LS Del system's light curve maxima. The mass ratio, fill-out factor, and star temperature all indicate that both systems are contact binary types in this investigation. Two methods were used to estimate the absolute parameters of the systems: one method used the parallax of Gaia DR3, and the other used a P - M relationship. The positions of the systems were also depicted on the M - L, M - R, q - L- ratio , and logM( tot) - logJ( 0) diagrams. We recommended that further observations and investigations be done on the existence of the fourth body in this system.
dc.description.sponsorshipScientific Research Projects Coordination Unit of Erciyes University [FBA-2022-11737]; NASA Explorer Program
dc.description.sponsorshipThis manuscript was prepared by the BSN project (https://bsnp.info/). This project was supported by the Scientific Research Projects Coordination Unit of Erciyes University (project number FBA-2022-11737). We have made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC). This work includes data from the TESS mission observations. Funding for the TESS mission is provided by the NASA Explorer Program. We thank Ehsan Paki for his comments on the orbital period variation section.
dc.identifier.doi10.1088/1674-4527/ad30b2
dc.identifier.issn1674-4527
dc.identifier.issn2397-6209
dc.identifier.issue4
dc.identifier.scopus2-s2.0-85190739051
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1088/1674-4527/ad30b2
dc.identifier.urihttps://hdl.handle.net/20.500.12428/20957
dc.identifier.volume24
dc.identifier.wosWOS:001204277600001
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherNatl Astronomical Observatories, Chin Acad Sciences
dc.relation.ispartofResearch in Astronomy and Astrophysics
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subject(stars:) binaries: eclipsing
dc.subjectmethods: observational
dc.subjectstars: individual (LS Del and V997 Cyg)
dc.titleBSN: Photometric Light Curve Analysis of Two Contact Binary Systems LS Del and V997 Cyg
dc.typeArticle

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