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Figure 1: NACO observations of AB Dor B in H and Ks broad-band and the NB3.74 narrow-band filter. The components of this close binary are resolved in H and Ks. North is up, east is to the left. |
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Figure 2: Color-magnitude diagram with AB Dor Ba (upper circle) and AB Dor Bb (lower circle), a Pleiades sample from Steele & Jameson (1995, triangles), and an IC 2391 sample from Barrado y Navascués (2004, stars). Two isochrones from BCAH 98 are also plotted - 50 Myr (dashed line), and 100 Myr (solid line). |
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Figure 3:
Luminosity versus temperature for AB Dor Ba and AB Dor Bb (solid boxes). and the three M3-stars from the AB Dor moving group (circles). Left: comparison with the IC 2391 sample (stars). Right: comparison with the Pleiades sample (triangles). Also plotted in both panels are mass tracks (units of
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Figure 4:
Equivalent width of the H![]() |
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Figure 5: Motions of AB Dor and the Pleiades (mean motion) assuming constant velocities. AB Dor is denoted by "A'', and the Pleiades are denoted by "P''. ru, rv and rw are the coordinates corresponding to U, V and W. The dotted lines are the spatial tracks relative to the sun over time. The circle at origin is the sun. |
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Figure 6:
Comparison of the measured and estimated quantities of AB Dor C to the Chabrier et al. (2000) model predictions. While there is an overlap between the measured brightness and the mass tracks for the given age, most of the parameter space implies that AB Dor C is fainter than what is predicted by the models. The solid box corresponds to the
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