A Statistical Standard Siren Measurement of the Hubble Constant from the LIGO/Virgo Gravitational Wave Compact Object Merger GW190814 and Dark Energy Survey Galaxies

A. Palmese, J. Devicente, M. E.S. Pereira, J. Annis, W. Hartley, K. Herner, M. Soares-Santos, M. Crocce, D. Huterer, I. Magaa Hernandez, A. Garcia, J. Garcia-Bellido, J. Gschwend, D. E. Holz, R. Kessler, O. Lahav, R. Morgan, C. Nicolaou, C. Conselice, R. J. FoleyM. S.S. Gill, T. M.C. Abbott, M. Aguena, S. Allam, S. Avila, K. Bechtol, E. Bertin, S. Bhargava, D. Brooks, E. Buckley-Geer, D. L. Burke, M. Carrasco Kind, J. Carretero, F. J. Castander, C. Chang, M. Costanzi, L. N.Da Costa, T. M. Davis, S. Desai, H. T. Diehl, P. Doel, A. Drlica-Wagner, J. Estrada, S. Everett, A. E. Evrard, E. Fernandez, D. A. Finley, B. Flaugher, P. Fosalba, J. Frieman, E. Gaztanaga, D. W. Gerdes, D. Gruen, R. A. Gruendl, G. Gutierrez, S. R. Hinton, D. L. Hollowood, K. Honscheid, D. J. James, S. Kent, E. Krause, K. Kuehn, H. Lin, M. A.G. Maia, M. March, J. L. Marshall, P. Melchior, F. Menanteau, R. Miquel, R. L.C. Ogando, F. Paz-Chinchón, A. A. Plazas, A. Roodman, M. Sako, E. Sanchez, V. Scarpine, M. Schubnell, S. Serrano, I. Sevilla-Noarbe, J. Allyn Smith, M. Smith, E. Suchyta, G. Tarle, M. A. Troxel, D. L. Tucker, A. R. Walker, W. Wester, R. D. Wilkinson, J. Zuntz

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15 Scopus citations

Abstract

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 o˙ black hole with a 2.6 M o˙ 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 uniform between. The addition of GW190814 and GW170814 to GW170817 improves the 68% HDI from GW170817 alone by ∼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.

Original languageEnglish (US)
Article numberL33
JournalAstrophysical Journal Letters
Volume900
Issue number2
DOIs
StatePublished - Sep 10 2020

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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