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27 April 2024 |
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On the dynamics of the ABDoradus system | | J.C. Guirado
; I. Marti-Vidal
; J.M. Marcaide
; L.M. Close
; J.C. Algaba
; W. Brandner
; J.-F. Lestrade
; D.L. Jauncey
; D.L. Jones
; R.A. Preston
; J.E. Reynolds
; | | Date: |
6 Oct 2005 | | Abstract: | We present an astrometric analysis of the binary systems ABDorA /ABDorC and ABDorBa / ABDorBb. 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 ABDorC, the very low mass companion to ABDorA, which confirms the mass estimate of 0.090Msun reported in previous works; (ii) a measurement of the parallax of ABDorBa, which unambiguously confirms the long-suspected physical association between this star and ABDorA; and (iii) evidence of orbital motion of ABDorBa around ABDorA, which places an upper bound of 0.4Msun on the mass of the pair ABDorBa / ABDorBb (50% probability). Further astrometric monitoring of the system at all possible wavelengths would determine with extraordinary precision the dynamical mass of its four components. | | Source: | arXiv, astro-ph/0510199 | | Services: | Forum | Review | PDF | Favorites | |
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