The identification of the electromagnetic (EM) counterpart candidate ZTF19abanrhr to the binary black hole merger GW190521 opens the possibility to infer cosmological parameters from this standard siren with a uniquely identified host galaxy. The distant merger allows for cosmological inference beyond the Hubble constant. Here, we show that the threedimensional spatial location of ZTF19abanrhr calculated from the EM data remains consistent with the latest sky localization of GW190521 provided by the LIGOVirgo Collaboration. If ZTF19abanrhr is associated with the GW190521 merger, and assuming a flat wCDM model, we find that $H_0=48^{+23}_{10}\, \mathrm{km} \, \mathrm{s}^{1}\, \mathrm{Mpc}^{1}$, $\Omega _m=0.35^{+0.41}_{0.26}$, and $w_0=1.31^{+0.61}_{0.48}$ (median and $68{{\ \rm per\ cent}}$ credible interval). If we use the Hubble constant value inferred from another gravitationalwave event, GW170817, as a prior for our analysis, together with assumption of a flat ΛCDM and the modelindependent constraint on the physical matter density ωm from Planck, we find $H_0=68.9^{+8.7}_{6.0}\, \mathrm{km} \, \mathrm{s}^{1}\, \mathrm{Mpc}^{1}$.
more » « less NSFPAR ID:
 10407158
 Publisher / Repository:
 Oxford University Press
 Date Published:
 Journal Name:
 Monthly Notices of the Royal Astronomical Society
 Volume:
 513
 Issue:
 2
 ISSN:
 00358711
 Page Range / eLocation ID:
 p. 21522157
 Format(s):
 Medium: X
 Sponsoring Org:
 National Science Foundation
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