A preliminary forecast for cosmological parameter estimation with gravitational-wave standard sirens from TianQin. (arXiv:1907.01838v1 [astro-ph.CO])
<a href="http://arxiv.org/find/astro-ph/1/au:+Wang_L/0/1/0/all/0/1">Ling-Feng Wang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhao_Z/0/1/0/all/0/1">Ze-Wei Zhao</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_J/0/1/0/all/0/1">Jing-Fei Zhang</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Zhang_X/0/1/0/all/0/1">Xin Zhang</a>
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.
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.
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