Astrometric Detection of a Low Mass Companion Orbiting the Star AB Doradus

Soderhjelm, S.; Guirado, J. C.; Reynolds, J. E.; Lestrade, J. F.; Preston, R. A.; Jauncey, D. L.; Jones, D. L.; Tzioumis, A. K.; Ferris, R. H.; King, E. A.; Lowell, J. E. J.; McCulloch, P. M.; Johnston, K. J.; Kingham, K. A.

Astrometric Detection of a Low Mass Companion Orbiting the Star AB Doradus

Soderhjelm, S.; Guirado, J. C.; Reynolds, J. E.; Lestrade, J. F.; Preston, R. A.; Jauncey, D. L.; Jones, D. L.; Tzioumis, A. K.; Ferris, R. H.; King, E. A.; Lowell, J. E. J.; McCulloch, P. M.; Johnston, K. J.; Kingham, K. A.

URI: http://hdl.handle.net/2014/22401

Date: 1997

Citation: USA

Abstract:

We report submilliarsecond-precise astrometric measurement for the late-type star AB Doradus via a combination of VLBI (very long baseline interferometry) and Hipparos satellite data. Our astrometric analysis results in the precise determination of the kinematics of this star, that reveals an orbital motion readily explained as caused by the gravitational interaction with a low-mass companion.

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