A statistical standard siren measurement of the Hubble constant from the LIGO/Virgo gravitational wave compact object merger GW190814 and Dark Energy Survey galaxies
Creators: name: Palmese, A.
name: deVicente, J.
name: Pereira, M. E. S.
name: Annis, J.
name: Hartley, W.
name: Herner, K.
name: Soares-Santos, M.
name: Crocce, M.
name: Huterer, D.
name: Hernandez, I. Magana
name: Davis, T. M.
name: Garcia, A.
name: Garcia-Bellido, J.
name: Gschwend, J.
name: Holz, D. E.
name: Kessler, R.
name: Lahav, O.
name: Morgan, R.
name: Nicolaou, C.
name: Conselice, C.
name: Foley, R. J.
name: Gill, M. S. S.
name: Abbott, T. M. C.
name: Aguena, M.
name: Allam, S.
name: Avila, S.
name: Bechtol, K.
name: Bertin, E.
name: Bhargava, S.
name: Brooks, D.
name: Buckley-Geer, E.
name: Burke, D. L.
name: Kind, M. Carrasco
name: Carretero, J.
name: Castander, F. J.
name: Chang, C.
name: Costanzi, M.
name: da Costa, L. N.
name: Desai, S.
name: Diehl, H. T.
name: Doel, P.
name: Estrada, J.
name: Everett, S.
name: Evrard, A. E.
name: Fernandez, E.
name: Finley, D. A.
name: Flaugher, B.
name: Fosalba, P.
name: Frieman, J.
name: Gaztanaga, E.
name: Gerdes, D. W.
name: Gruen, D.
name: Gruendl, R. A.
name: Gutierrez, G.
name: Hinton, S. R.
name: Hollowood, D. L.
name: Honscheid, K.
name: James, D. J.
name: Kent, S.
name: Krause, E.
name: Kuehn, K.
name: Lin, H.
name: Maia, M. A. G.
name: March, M.
name: Marshall, J. L.
name: Melchior, P.
name: Menanteau, F.
name: Miquel, R.
name: Ogando, R. L. C.
name: Paz-Chinchon, F.
name: Plazas, A. A.
name: Roodman, A.
name: Sako, M.
name: Sanchez, E.
name: Scarpine, V.
name: Schubnell, M.
name: Serrano, S.
name: Sevilla-Noarbe, I.
name: Smith, J. Allyn
name: Smith, M.
name: Suchyta, E.
name: Tarle, G.
name: Troxel, M. A.
name: Tucker, D. L.
name: Walker, A. R.
name: Wester, W.
name: Wilkinson, R. D.
name: Zuntz, J.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present a measurement of the Hubble constant $H_0$ using the gravitational wave (GW) event GW190814, which resulted from the coalescence of a 23 $M_\odot$ black hole with a 2.6 $M_\odot$ compact object, as a standard siren. No compelling electromagnetic counterpart has been identified for this event, thus our analysis accounts for thousands of potential host galaxies within a statistical framework. The redshift information is obtained from the photometric redshift (photo-$z$) catalog from the Dark Energy Survey. The luminosity distance is provided by the LIGO/Virgo gravitational wave sky map. Since this GW event has the second-smallest localization volume after GW170817, GW190814 is likely to provide the best constraint on cosmology from a single standard siren without identifying an electromagnetic counterpart. Our analysis uses photo-$z$ probability distribution functions and corrects for photo-$z$ biases. We also reanalyze the binary-black hole GW170814 within this updated framework. We explore how our findings impact the $H_0$ constraints from GW170817, the only GW merger associated with a unique host galaxy. From a combination of GW190814, GW170814 and GW170817, our analysis yields $H_0 = 72.0^{+ 12}_{- 8.2 }~{\rm km~s^{-1}~Mpc^{-1}}$ (68\% Highest Density Interval, HDI) for a prior in $H_0$ uniform between $[20,140]~{\rm km~s^{-1}~Mpc^{-1}}$. The addition of GW190814 and GW170814 to GW170817 improves the 68\% HDI from GW170817 alone by $\sim 18\%$, showing how well-localized mergers without counterparts can provide a significant contribution to standard siren measurements, provided that a complete galaxy catalog is available at the location of the event.
description: 12 pages, 3 figures, replacement reflects published version