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Does Matter Matter? Using the Mass Distribution to Distinguish Neutron Stars and Black Holes

  • Authors: Maya Fishbach, Reed Essick, and Daniel E. Holz

2020 The Astrophysical Journal Letters 899 L8.

  • Provider: AAS Journals

Caption: Figure 2.

Corner plot (Foreman-Mackey 2016) comparing (orange) the power-law fit to the 10 BBHs and (blue) the fit to all 11 events. Contours show 50% and 90% credible regions. The main effect of adding the BNS event GW170817 to the power-law fit is on the ﹩{m}_{\min }﹩ constraints (first column), particularly the joint α–﹩{m}_{\min }﹩ constraints (first column, third row). The low mass of GW170817 forces ﹩{m}_{\min }\lesssim 1.3﹩ but prefers a relatively steeper power-law slope compared to the BBH-only joint fit for α–﹩{m}_{\min }﹩. However, the power-law fit to all 11 events remains consistent with the BBH-only fit within the 90% level.

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