Multi-color light curves and orbital period research of eclipsing binary V1073 Cyg

• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2018,（2）
• 页码范围: 83-92
• 页数: 10页
• 语种: 英文
• DOI: 10.1088/1674-4527/18/2/20

摘要

New multi-color BVRcIc photometric observations are presented for the W UMa type eclipsing binary V 1073 Cyg.The multi-color light curve analysis with the Wilson-Devinney procedure yielded the absolute parameters of this system,showing that V 1073 Cyg is a shallow contact binary system with a fill-out factor f =0.124(±0.011).We collected all available times of light minima spanning 119yr,including CCD data to construct the O-C curve,and performed detailed O-C analysis.The O-Cdiagram shows that the period change is complex.A long-term continuous decrease and a cyclic variation exist.The period is decreasing at a rate of(P) =-1.04(±0.18) × 10-10 d cycle-1 and,with the period decrease,V1073 Cyg will evolve to the deep contact stage.The cyclic variation with a period of P3 =82.7(±3.6) yr and an amplitude of A =0.028(±0.002) d may be explained by magnetic activity of one or both components or the light travel time effect caused by a distant third companion with M3(i'=90°) =0.511 M☉.