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Figure 2: Spectra of seven objects observed with the ESO NTT. The spectra are flux calibrated, normalised at 7500 Å and vertically shifted by integer constants. The positions of the main absorption lines are marked at the top, whereas telluric absorption bands and lines are marked at the bottom. |
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Figure 3: Red spectral region used for radial velocity measurements. Shown are the locations of the KI, NaI, FeI and CaII lines which were measured with respect to telluric absorption lines marked at the bottom. |
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Figure 4: New version of the CaH2+CaH3 versus TiO5 diagram, used by Lépine et al. (2003b,c) to discriminate between three different object classes (M, sdM, esdM) according to the classification scheme of Gizis (1997). Included are all known subdwarfs, with the coolest (smallest CaH2+CaH3) labeled by their names. The three new subdwarfs are marked as filled squares. The new nearby M 5.5 dwarf is marked by a filled circle. For more details on the samples and individual objects shown in this plot, see text. |
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Figure 1:
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