HIP 10090 periodograms. Shown from top to bottom: RVs, model residuals, FWHM, BIS, and window function. FAP lines for 0.1, 1, and 10%, in dashed red, dotted purple, and dotted blue, respectively. Circle markers show the periods with greatest power, coloured by FAP region. Green and orange vertical regions show P₁ = ${2960}_{-100}^{+120}$ d and P₂ = ${321.82}_{-0.56}^{+0.32}$ d, respectively. On the right side, a table summary with the highest powers.