The AB Doradus system revisited: The dynamical mass of AB Dor A

Chapter · December 2009with8 Reads
DOI: 10.1007/978-3-642-11250-8_13
In book: Highlights of Spanish Astrophysics V, pp.139-145


    We report new radio interferometric observations of the quadruple pre-main-sequence (PMS) system ABD oradus. From these observations,
    combined with existing VLT near-infrared relative astrometry, we have refined the estimates of the dynamical masses of the
    system. In particular, we find component masses of 0.86 ± 0.09M⊙ and 0.090 ± 0.003M⊙ for ABD or A and ABD or C, respectively. These dynamical masses, coupled with temperatures and luminosities, allow for comparison
    with theoretical stellar models. The case of ABDorC, in terms of calibration of evolutionary models of low-mass young stars
    has been widely reported in previous studies. In this contribution, we compare the measured properties of ABDorA with several
    solar-composition models for PMS stars. The models used in this comparison predict the dynamical mass to within the quoted