The First Photometric Study of AH Mic Contact Binary System  

作　　者：Atila Poro M.G.Blackford S.Ranjbar Salehian E.Jahangiri M.Samiei Dastjerdi M.Gozarandi R.Karimi T.Madayen E.Bakhshi F.Hedayati 

机构地区：[1]Astronomy Department of the Raderon Lab.,BC,Bumaby,Canada [2]Variable Stars South(VSS),Congarinni Observatory,Congarinni,NSW,2447,Australia [3]Binary Systems of South and North(BSN)Project,Contact Systems Department,Iran [4]Department of Physics,Kharazmi University,Tehran,Iran [5]Astronomy and Astrophysics Department,University of Toronto,Toronto,Canada [6]Department of Physics,Institute for Advanced Studies in Basic Sciences(IASBS),Zanjan,Iran

出　　处：《Research in Astronomy and Astrophysics》2022年第5期182-189,共8页天文和天体物理学研究（英文版）

基　　金：funded in part by the National Science Foundation(NSF 1517474,1909109);the National Aeronautics and Space Administration(NASA 17-ADAP17-68)。

摘　　要：The first multi-color light curve analysis of the AH Mic binary system is presented.This system has very few past observations from the southern hemisphere.We extracted the minima times from the light curves based on the Markov Chain Monte Carlo(MCMC)approach and obtained a new ephemeris.To provide modern photometric light curve solutions,we used the Physics of Eclipsing Binaries(PHOEBE)software package and the MCMC approach.Light curve solutions yielded a system temperature ratio of 0.950,and we assumed a cold starspot for the hotter star based on the O’Connell effect.This analysis reveals that AH Mic is a W-subtype W UMa contact system with a fill-out factor of 21.3%and a mass ratio of 2.32.The absolute physical parameters of the components are estimated by using the Gaia Early Data Release 3(EDR3)parallax method to be M_(h)(M_(⊙))=0.702(26),M_(c)(M_(⊙))=1.629(104),R_(h)(R_(⊙))=0.852(21),R_(c)(R_(⊙))=1.240(28),L_(h)(L_(⊙))=0.618(3)and L_(c)(L_(⊙))=1.067(7).The orbital angular momentum of the AH Mic binary system was found to be 51.866(35).The components’positions of this system are plotted in the Hertzsprung-Russell diagram.

关 键 词：photometry-binary stars-individual (AH Mic) 

分 类 号：P153[天文地球—天文学]