6533b831fe1ef96bd129868a
RESEARCH PRODUCT
On the dynamics of the AB Doradus system
D. L. JonesIvan Marti-vidalJ.-f. LestradeJ. M. MarcaideD. L. JaunceyWolfgang BrandnerJ. C. GuiradoJohn ReynoldsLaird M. CloseJ. C. AlgabaRobert A. Prestonsubject
KinematicsAB DorFOS: Physical sciencesBinary numberIndividualAstrophysicsLate-typeStar (graph theory)AstrophysicsUNESCO::ASTRONOMÍA Y ASTROFÍSICAUpper and lower boundsAstrometry ; Stars ; Kinematics ; Binaries ; Close ; Late-type ; Individual ; Rst 137 B ; AB DorRst 137 BPhysicsAstrophysics (astro-ph)BinariesAstronomy and AstrophysicsAstrometryStars:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]Stars[SDU]Sciences of the Universe [physics]Space and Planetary ScienceOrbital motionOrbit (dynamics)UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Low MassParallaxClose:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]description
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-01-01 | Astronomy & Astrophysics |