A preliminary forecast for cosmological parameter estimation with gravitational-wave standard sirens from TianQin

Understand

TianQin is a space-based gravitational-wave observatory scheduled to be launched in the 2030s.

• In this work, we make a preliminary forecast for the cosmological parameter estimation with the gravitational-wave standard siren observation from TianQin.
• We simulate the standard siren data of TianQin based on its 5-year observation after the completion of construction.
• In the simulation, three models for the population of massive black hole binary (MBHB), i.e., pop III, Q3nod, and Q3d, are considered to predict the event numbers of MBHB mergers.