首页|Photometric Studies of EV Cnc and AH Cnc in the Open Cluster M67

Photometric Studies of EV Cnc and AH Cnc in the Open Cluster M67

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Contact binaries at various stages of evolution unveil various operating mechanisms that drive them.We report the photometric and period variation analysis of two contact binaries EV Cnc and AH Cnc in open cluster M67.We observed the cluster from the JCBT 1.3 m telescope and utilized TESS and Kepler observations.The photometric solutions of EV Cnc and AH Cnc revealed a mass ratio of q～0.41 and～0.15 with an inclination of i=42° and 87° respectively.These solutions suggest that EV Cnc is probably a semi-detached and AH Cnc is a deep low-mass ratio contact binary.The study of O-C variation analysis indicates that for both systems,the period is increasing which suggests the mass transfer is occurring from secondary to primary.In the case of AH Cnc and based on simulations by randomly varying the time of minima to fit the LITE solution,we noted the third body orbital period to be around P3=26.82±2.54 yr,which is different from earlier reported values and conclude that future observations are required to confirm this scenario.We compare these two systems with other similar contact binaries to get an estimate of the final configuration of the respective systems.

(stars:)binaries(including multiple):close(stars:)binaries:eclipsingstars:activity

Mamatha Rani G.、K.Sriram、Deblina Lahiri、Vijaya A.

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Department of Astronomy,Osmania University,Hyderabad 500007,India

SRF INSPIRE fellowship program,Government of IndiaSERB Core Research Grant project,the Government of IndiaNASA Explorer ProgramNASA Science Mission DirectorateAssociation of Universities for Research in Astronomy,Incnational institutionsinstitutions participating in the Gaia Multilateral Agreement(MLA)

IF 170314NAS 5-26555

2024

10.1088/1674-4527/ad634e

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子：0.406
ISSN：1674-4527
年,卷(期)：2024.24(8)