Magnetic activity and orbital dynamics of the K-dwarf triple system DH Leonis

Isik E.

Meeting on Spectroscopically and Spatially Resolving the Components of Close Binary Stars, Dubrovnik, Croatia, 20 - 24 October 2003, vol.318, pp.251-254 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 318
  • City: Dubrovnik
  • Country: Croatia
  • Page Numbers: pp.251-254
  • Akdeniz University Affiliated: No


DH Leo, a (K0OV+K7V)/K5V type spectroscopic triple system consisting of an active close binary (P-orb similar to 1.07 d) and a distant, slowly rotating tertiary has been observed spectroscopically in 2000 and 2002. The orbit of the tertiary has been estimated using long-term cross-correlation radial velocities and results from astrometric studies. Chromospheric activity patterns of the close binary components has been resolved using semi-empirically synthesized H-alpha spectra. Following a simple but statistically convenient method, the slowly-rotating tertiary has been found to be inactive within the errors of measurement.