In a 2D density plot estimated by a Gaussian kernel $K(x,y) = \frac{1}{2\pi h^2} \exp\left(-\frac{x^2+y^2}{2h^2}\right)$, if the bandwidth parameter $h$ is reduced by a factor of $k=2$, how does the peak density $f(x,y)$ change for a concentrated point mass?