Rica, F. M.; Barrena, R.; Henríquez, J. A.; Pérez, F. M.; Vargas, P.
Bibliographical reference
Publications of the Astronomical Society of Australia, Volume 34, id.e004 14 pp.
Advertised on:
1
2017
Citations
4
Refereed citations
3
Description
HD 106515 AB (STF1619 AB) is a high common proper motion and common
radial velocity binary star system composed of two G-type bright stars
located at 35 pc and separated by about 7 arcsec. This system was
observed by the Hipparcos satellite with a precision in distance and
proper motion of 3 and 2%, respectively. The system includes a
circumprimary planet of nearly 10 Jupiter masses and a semimajor axis of
4.59 AU, discovered using the radial velocity method. The observational
arc of 21° shows a small curvature that evidences HD 106515 AB is a
gravitationally bound system. This work determines the dynamical
parameters for this system which reinforce the bound status of both
stellar components. We determine orbital solutions from instantaneous
position and velocity vectors. In addition, we provide a very
preliminary orbital solution and a distribution of the orbital
parameters, obtained from the line of sight (z). Our results show that
HD 106515 AB presents an orbital period of about 4 800 years, a
semimajor axis of 345 AU and an eccentricity of about 0.42. Finally, we
use an N-body numerical code to perform simulations and reproduce the
longer term octupole perturbations on the inner orbit.