Vol 21, No 5

The stellar system HIP 101227: is it a binary, a triple or a quadruple system?

Zahra Talal Yousef, Adlyka Annuar, Abdallah Mohammad Hussein, Hamid Al-Naimiy, Mashoor Al-Wardat, Nurul Shazana Abdul Hamid, Mohamad Fadil Talafha


Abstract In this paper, we present the analysis of the stellar system HIP 101227 to determine the actual number of components in the system, and their properties. We use dynamical modeling and complex spectrophotometric (involving atmospheric modeling) techniques with recent data, to determine the physical properties and orbital solution for the system, respectively, with better accuracy than past studies. Based on our analysis, we found that the system is more consistent with being a quadruple rather than a binary or a triple system as suggested by previous studies. The total mass of the system determined from our SED analysis is \(3.42 \pm 0.20 M_{\odot}\), which is distributed almost equally between the four stars. The stars are found to be zero-age main sequence stars; i.e., at the last stage of pre-main sequence, with age less than 200 Myr and spectral types K0. All four stars have very similar physical characteristics, suggesting that the fragmentation process is the most likely theory for the formation and evolution of the system.


Keywords stars: binaries: close — stars: binaries: visual — stars: individual: HIP 101227

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