Search for the radiative decays D⁺→ γρ⁺ and D⁺→ γK^*+

We search for the radiative decays D⁺ → γρ⁺ and D⁺ → γK^*+ using 20.3 fb⁻¹ of e⁺e⁻ annihilation data collected at the center-of-mass energy s = 3.773 GeV by the BESIII detector operating at the BEPCII collider. No significant signals are observed, and the upper limits on the branching fractions of D⁺→ γρ⁺ and D⁺→ γK^*+ at 90% confidence level are set to be 1.3 × 10⁻⁵ and 1.8 × 10⁻⁵, respectively.