Mean vsini , orbital eccentricity and host-star metallicity as a function of planet mass for transiting planets with period <10 d. The error bars correspond to the standard error of the mean, the grey dots show the minima and maxima inside a mass bin, the numbers mark the number of planets in each bin, and the grey shaded area with a black contour line shows the parameter estimates with their uncertainty (or the 99% confidence upper limit at 0.064 for eccentricity). The dotted horizontal line with a grey error bar shows the average for planets with masses <5 M_Jup.