Figure 1: [X/Fe] vs. and [X/Fe] vs. . Triangles and asterisks are planet host and comparison sample stars, respectively. Dotted lines represent the solar value. The slopes represent linear least-squares fits to both planet-hosts and comparison stars. | |
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Figure 2: Distributions of planet-host stars and non-planet-host stars as functions of . The planet-host stars and the comparison sample are represented with solid and dotted lines, respectively. | |
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Figure 3: [X/H] distributions for Ti, V and Co for the two subsamples of planet host (solid line) and comparison sample (dotted lines) stars with the same distributions. | |
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Figure 4: Comparison of the abundances of nine refractory elements calculated with EW values measured from spectra taken with different instruments. Along the x-asis are results from FEROS spectra, while along the y-axis we represent abundance values for the same objects, calculated using other spectra. UVES, CORALIE and SARG results are respectively represented with rhombi (HD 16141, HD 27442), triangles (HD 83443, HD 92788, HD 106252, HD 114386) and asterisks (HD 114783, HD 147513). | |
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Figure 5: [X/H] vs. [Fe/H] for Si, Ca, Ti ( left), for Sc, Mn and V ( centre), for Cr, Co and Ni ( right). Triangles and asterisks represent stars with planetary-mass companion and "single'' field stars, respectively. The intersection of the dotted lines indicates solar value. | |
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Figure 6: [X/H] distribution for each element. The planet-host stars and the comparison sample are represented with solid and dotted lines, respectively. | |
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Figure 7: [X/Fe] vs. [Fe/H](in dex) for elements (Si, Ca, Ti, Sc) and for iron-peak elements (Cr, Co, Ni, Mn, V). [V/Fe] vs. [Fe/H] for K objects only ( below right panel). The triangles and asterisks represent stars with planets and "single'' stars, respectively. The intersection of the dotted lines indicates the solar value. | |
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Figure 8: [X/Fe] vs. [Fe/H] trends using binned average values. The bins are 0.2 dex wide, centred on [Fe/H ] =-0.6, -0.4,-0.2,0,0.2 and 0.4 for both samples. Triangles are planet-hosts while rhombi are stars without a planetary-mass companion. The error bars represent the standard deviation about the mean value. | |
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Figure 9: Same as Fig. 6 but for the Na, Mg and Al distributions. | |
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Figure 10: [X/Fe] vs. [Fe/H] (in dex). Results by Beirão et al. (2005) with the addition of abundances from new comparison sample spectra. On the left are the plots for Na, Mg and Al, and on the right the same plots only for K objects. Triangles and asterisks represent stars with planetary-mass companions and "single'' field stars, respectively. The intersection of the dotted lines indicates the solar value. | |
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Figure 11: The same as Fig. 8 but for Na, Mg and Al. | |
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