On the dynamics of the AB Doradus system
Loading...
Publication date
2006
Reading date
Advisors
Journal Title
Journal ISSN
Volume Title
Publisher
Metrics
Export
Abstract
We present an astrometric analysis of the binary systems AB DorA/ABDor C and ABDor Ba /AB Dor Bb. These two systems of well-known late-type stars are gravitationally associated and they constitute the quadruple ABDoradus system. From the astrometric data available at different wavelengths, we report: (i) a determination of the orbit of ABDor C, the very low mass companion to ABDorA, which confirms the mass estimate of 0.090 Mo reported in previous works; (ii) a measurement of the parallax of ABDorBa, which unambiguously confirms the long-suspected physical association between this star and ABDor A; and (iii) evidence of orbital motion of ABDor Ba around ABDorA, which places an upper bound of 0.4 Mo on the mass of the pair ABDorBa /ABDor Bb (50% probability). Further astrometric monitoring of the system at all possible wavelengths would determine with extraordinary precision the dynamical mass of its four components.
Description
Bibliographic reference
GUIRADO PUERTA, Jose Carlos ; Marti Vidal, Ivan ; Marcaide Osoro, Juan María ; Close, L.M. ; Algaba, J.C. ; Brandner, W. ; Lestrade, J.-F. ; Jauncey, D.L. ; Jones, D.L. ; Preston, R.A. ; Reynolds, J.E., 2006, On the dynamics of the AB Doradus system, Astronomy and Astrophysics, vol. 442, no. 2, p. 733-738