Speaker
Ran Ding
Description
In this talk, we focus on the radio detection of a high-frequency gravitational-wave background and dark matter annihilation. Based on existing and projected data from the Hongmeng radio survey, we systematically study two processes:
1）High-frequency gravitational waves, generated by phase transitions and other new physics, are converted into radio photons via the inverse Gertsenshtein effect in the strong magnetic fields of Galactic compact objects such as neutron stars and white dwarfs.
2）High-energy electron–positron pairs from dark matter annihilation produce radio signals through synchrotron radiation in the Galactic magnetic field.