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Figure 1:
Comparison spectra for two stars: solid line - a
planet-host star HD 217014
(51 Peg), and dotted line - a non-planet star HD 5294.
Within the limits of the errors, both stars have identical
temperatures (5778 and 5779 K, respectively), but different
metallicities. Spectral lines used in temperature
calibrations are identified at the bottom with their
wavelength, element, and lower excitation potentials ![]() |
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Figure 2: Our final calibrations of temperature versus line depth ratios r=R1/R2. The temperatures are shown as the average value derived from all calibrations available for a given star. The errors in temperature are less than the symbol size. The typical error in line ratio is 0.02-0.05. Position of the Sun is marked by the standard symbol. |
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Figure 3: Comparison between the temperatures derived in the present work and those derived by AAMR96 - squares, BLG98 - circles, and DB98 - triangles. The dashed line represents the linear fit to the data, and the solid line represents the one-to-one correlation. |
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Figure 4: Standard error of the mean versus effective temperature averaged over all available line ratios. |
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