CN Andromedae: a shallow contact binary with a possible tertiary component

Basit Öğe Kaydı
dc.authoridSoydugan, Faruk/0000-0002-5141-7645
dc.contributor.authorYildirim, Muhammed Faruk
dc.contributor.authorAlicavus, Fahri
dc.contributor.authorSoydugan, Faruk
dc.date.accessioned2025-01-27T20:51:52Z
dc.date.available2025-01-27T20:51:52Z
dc.date.issued2019
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractIn this study, new photometric observations of shallow contact binary CN Andromedae (CN And) were performed and multi-color (BV R) CCD light curves (LCs) were obtained. Simultaneous analysis of new LCs and published radial velocity (RV) data reveals that the system is an early contact binary in which both components have recently filled their inner Roche lobes. Asymmetric LCs were modeled by a dark spot on the primary component and a hot spot on the secondary component that probably resulted from magnetic activity and mass transfer, respectively. Modeling of LCs and RV data allows us to estimate the following absolute parameters: M-1= 1.40 +/- 0.02 M-circle dot, M-2 = 0.55 +/- 0.01 M-circle dot, R-1 = 1.45 +/- 0.02 R-circle dot and R-2 = 0.94 +/- 0.02 R-circle dot. A decreasing orbital period with a rate of dP/dt = -1.5 x 10(-7) d yr(-1) can be seen as evidence that the system is evolving into a contact binary with higher contact degree. Cyclic oscillation of the O - C data was interpreted by the Applegate mechanism and light-time effect due to an unseen component around the close binary system. The hypothetical third component is probably a fully convective red dwarf star with a minimal mass of 0.1 M-circle dot. CN And is at the early phase of the contact stage of its evolution and is an interesting example for studying the formation and evolution of close binaries.
dc.description.sponsorshipScientific Research Fund of Canakkale Onsekiz Mart University, Turkey [FDK-2018-2458]; Astrophysics Research Centre; Ulupinar Observatory of Canakkale Onsekiz Mart University; Robert Martin Ayers Sciences Fund
dc.description.sponsorshipThe authors thank the anonymous referee for the substantial suggestions and comments that enabled us to improve the manuscript. This study was supported by the Scientific Research Fund of Canakkale Onsekiz Mart University, Turkey (Project No. FDK-2018-2458). We thank the Astrophysics Research Centre and Ulupinar Observatory of Canakkale Onsekiz Mart University for their support and allowing use of their T30 telescope. The current research forms part of the PhD thesis of M.F. Yildirim. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. This research has made use of the APASS database, located at the AAVSO web site. Funding for APASS has been provided by the Robert Martin Ayers Sciences Fund. This research made use of VIZIER and SIMBAD databases at CDS, Strasbourg, France.
dc.identifier.doi10.1088/1674-4527/19/1/10
dc.identifier.issn1674-4527
dc.identifier.issn2397-6209
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85062456577
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.1088/1674-4527/19/1/10
dc.identifier.urihttps://hdl.handle.net/20.500.12428/25554
dc.identifier.volume19
dc.identifier.wosWOS:000456345900010
dc.identifier.wosqualityQ3
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.subjectbinaries: eclipsing
dc.subjectstars: fundamental parameters
dc.subjectstars: individual (CN And)
dc.titleCN Andromedae: a shallow contact binary with a possible tertiary component
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu