The Hubble constant H0 tension is a well-known issue of the cosmology This problem stems from the inconsistency between the value of H0 fitted after the cosmological model is constrained by the CMB an

The Hubble constant (H0) is a fundamental parameter in cosmology that describes the rate at which the universe is expanding. However, there is currently a discrepancy between the value of H0 obtained from measurements of the cosmic microwave background (CMB) radiation and other astrophysical data, and the value obtained from direct measurements of distance using the cosmic distance ladder. This is known as the H0 tension.

To resolve this tension, new cosmological probes are needed to provide independent measurements of H0. One such probe is the gravitational-wave (GW) dark standard siren, which uses the gravitational waves emitted by merging neutron stars or black holes to measure cosmic distances.

In this presentation, the speaker will discuss their recent work using a mock galaxy catalog from the China Space Station Telescope (CSST) combined with simulated dark standard siren data from the next generation of ground-based GW detectors to constrain H0. The results show that this approach can provide an accurate measurement of H0 with an error of less than 1%, providing an independent arbitration for the H0 tension.

Overall, this work demonstrates the potential of combining multiple cosmological probes to obtain more precise and reliable measurements of fundamental parameters in cosmology