The system of subdwarfs G89-14 is one of the most metal-poor multiple stars
with an atmospheric metal abundance [m/H]=β1.9. Speckle
interferometry at the 6-m BTA telescope has revealed that G89-14 consists of
four components. Measurements of the magnitude difference between the
components and published data have allowed their masses to be estimated:
MAββ0.67Mββ, MBββ0.24Mββ, MCββ0.33Mββ, and MDββ0.22Mββ. The ratio of the orbital periods
of the subsystems has been obtained, 0.52 yr : 3 000 yr : 650 000 yr
(1:5769:1250000), indicative of a high degree of hierarchy of G89-14 and its
internal dynamical stability. The calculated Galactic orbital elements and the
low metallicity of the quadruple system suggest that it belongs to the Galactic
halo.Comment: 5 pages, 3 figure