Astrometry of the ABDoradus system

Details Astrometry of the ABDoradus system Astrometry of the ABDoradus system

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006atnf.prop..462g&link_type=abstract

ATNF proposal V186, Semester: October, 2006

Astronomy and Astrophysics

Astronomy

Stellar, Lba

Scientific paper

The radio stars ABDorA and Rst137B are the main components of the system ABDoradus. Both stars are double, making a quadruple system. VLBI astrometric monitoring of the orbital motion of the two radio stars may provide precise estimates of their low-mass companions. We propose sensitive VLBI phase-referenced observations of ABDoradus to follow-up both the reflex orbital motion of ABDorA and the long-term relative orbit of Rst137B. These observations will refine the mass estimate of ABDorC, the low-mass companion to ABDorA, which serves as benchmark for calibration of theoretical evolutionary models of low-mass young stars. Bounds to the pair in Rst137B will result in calibration points for larger masses.

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