On the structure of $D_{sJ}^{\ast }(2317)$ and $D_{sJ}(2460)$

We discuss the structure of the narrow mesons with charm and strangeness $D_{sJ}^{\ast }(2317)$ and $D_{sJ}(2460)$, stressing the role of the radiative decay modes in shedding light on the quark content of these states. We argue that present experimental data favour the interpretation of the two states as ordinary $\bar{c}s$ mesons. We suggest the existence of resonances with similar properties and well predicted masses in the $\bar{b}s$ sector.