Astrophysics and Space Science

, Volume 304, Issue 1, pp 243–246

A Three Body Solution for the DI Her System

  • Keith Hsuan
  • Rosemary A. Mardling
Original Article

DOI: 10.1007/s10509-006-9121-0

Cite this article as:
Hsuan, K. & Mardling, R.A. Astrophys Space Sci (2006) 304: 243. doi:10.1007/s10509-006-9121-0


The DI Herculis system has been extensively studied over the past few decades because its observed rate of apsidal advance is less than a quarter of that which is expected from its physical and orbital properties. Work by Khaliullin et al. (1991) proposed that this slow rate of apsidal advance is a result of the presence of a third (stellar mass) body orbiting the system, however, observations by Guinan et al. (1994) severely restrict the orbital properties of such a solution. We show that a planetary mass object in a highly inclined orbit relative to the binary is capable of producing the observed apsidal motion, while remaining within the bounds of the most recent set of observations. A wide range of stable solutions are possible.


Planetary systems Stars: binaries: eclipsing Celestial mechanics 

Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • Keith Hsuan
    • 1
  • Rosemary A. Mardling
    • 1
  1. 1.Centre for Stellar and Planetary AstrophysicsMonash UniversityClaytonAustralia