Hertzsprung-Russell diagram showing a subset of the δ Scuti stars in the CoRoT catalog that have an absolute magnitude and effective temperature in Gaia DR3. In the side plots of each axis, a kernel density estimation (KDE) of the corresponding variable is shown. This is an approximation of the underlying probability density function that generated the data. However, unlike a histogram, which bins and counts the observations, a KDE plot smooths the observations with a Gaussian kernel, producing a continuous density estimate.