http://arxiv.org/abs/1907.01838
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 from its five-year observation after its completion of construction. In the simulation, three models of growth history of massive black holes, i.e., pop III, Q3nod, and Q3d, are considered in the prediction for the event numbers of massive black hole binary mergers. We find that: (i) among the three black hole growth models, the TianQin’s data simulated based on the Q3nod model can provide the tightest constraints on the cosmological parameters; (ii) although the cost of TianQin is less than that of LISA, their capabilities on constraining cosmological parameters using the standard siren observation are actually similar; and (iii) the standard siren observation from TianQin can actually provide important helps in the cosmological estimation in the future.
L. Wang, Z. Zhao, J. Zhang, et. al.
Thu, 4 Jul 19
45/46
Comments: 10 pages, 4 figures
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