"p">,</span>
    <span class="n">merger_rate_density</span><span class="o">=</span><span class="s2">&quot;merger_rate_density_bbh_popI_II_oguri2018&quot;</span><span class="p">,</span>
    <span class="n">merger_rate_density_param</span><span class="o">=</span><span class="nb">dict</span><span class="p">(</span><span class="n">R0</span><span class="o">=</span><span class="mf">25.</span><span class="o">*</span><span class="mf">1e-9</span><span class="p">,</span> <span class="n">b2</span><span class="o">=</sp