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Title: Improved Constraints on H0 from a Combined Analysis of Gravitational-wave and Electromagnetic Emission from GW170817

Journal Article · · The Astrophysical Journal. Letters (Online)
ORCiD logo [1]; ORCiD logo [2];  [3];  [4]; ORCiD logo [2]; ORCiD logo [5]; ORCiD logo [1]; ORCiD logo [6]; ORCiD logo [5];  [5];  [7];  [2];  [5];  [8]; ORCiD logo [9]; ORCiD logo [5]; ORCiD logo [10]; ORCiD logo [2]; ORCiD logo [5]; ORCiD logo [5]
  1. Univ. of Ferrara (Italy). Dept. of Physics and Earth Science
  2. Northwestern Univ., Evanston, IL (United States). Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Dept. of Physics and Astronomy
  3. Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. of Physics and Astronomy
  4. Univ. of Chicago, IL (United States). Enrico Fermi Inst., Dept. of Physics, Dept. of Astronomy and Astrophysics
  5. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  6. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  7. Ohio Univ., Athens, OH (United States). Astrophysical Inst., Dept. of Physics and Astronomy
  8. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Univ. of Chicago, IL (United States). Dept. of Astronomy and Astrophysics
  9. Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  10. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States); Brandeis Univ., Waltham, MA (United States). Dept. of Physics

The luminosity distance measurement of GW170817 derived from gravitational-wave analysis in Abbott et al. (2017a, hereafter A17:H0) is highly correlated with the measured inclination of the NS–NS system. To improve the precision of the distance measurement, we attempt to constrain the inclination by modeling the broadband X-ray-to-radio emission from GW170817, which is dominated by the interaction of the jet with the environment. We update our previous analysis and we consider the radio and X-ray data obtained at t < 40 days since merger. We find that the afterglow emission from GW170817 is consistent with an off-axis relativistic jet with energy Ek~1048 -3 × 1050 erg propagating into an environment with density n ~ 10-2–10-4 cm-3, with preference for wider jets (opening angle θ j = 15°). For these jets, our modeling indicates an off-axis angle θ obs ~25°–50°. We combine our constraints on θ obs with the joint distance–inclination constraint from LIGO. Using the same ~170 km s-1 peculiar velocity uncertainty assumed in A17:H0 but with an inclination constraint from the afterglow data, we get a value of H0 =74.0 ± $$\frac{11.5}{7.5}$$ km s-1 Mpc-1, which is higher than the value of H0 70.0 ± $$\frac{12.0}{8.0}$$ km s-1 Mpc-1 found in A17:H0. Further, using a more realistic peculiar velocity uncertainty of 250 km s-1 derived from previous work, we find km s-1 Mpc-1 for H0 from this system. This is in modestly better agreement with the local distance ladder than the Planck cosmic microwave background, though such a significant discrimination will require ~50 such events. Finally, measurements at t > 100 days of the X-ray and radio emission will lead to tighter constraints.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-07CH11359; SC0007859
OSTI ID:
1434943
Alternate ID(s):
OSTI ID: 1645477
Report Number(s):
FERMILAB-PUB-17-469-A; arXiv:1710.06426; 1631149; TRN: US1802825
Journal Information:
The Astrophysical Journal. Letters (Online), Vol. 851, Issue 2; ISSN 2041-8213
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 67 works
Citation information provided by
Web of Science

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Cited By (37)

A Hubble constant measurement from superluminal motion of the jet in GW170817 journal July 2019
Calibrating gravitational-wave detectors with GW170817 journal May 2019
Theoretical cosmology journal November 2019
H 0 from cosmic chronometers and Type Ia supernovae, with Gaussian Processes and the novel Weighted Polynomial Regression method journal April 2018
Limits on the number of spacetime dimensions from GW170817 journal July 2018
Prospects of the local Hubble parameter measurement using gravitational waves from double neutron stars journal January 2018
First cosmological results using Type Ia supernovae from the Dark Energy Survey: measurement of the Hubble constant journal April 2019
Observational evidence for extended emission to GW170817 journal September 2018
Unbiased Hubble constant estimation from binary neutron star mergers journal November 2019
Modified gravitational-wave propagation and standard sirens journal July 2018
Primordial gravitational waves and the H 0 -tension problem journal February 2019
Dark energy in Horndeski theories after GW170817: A review journal April 2019
Dark Energy in Light of Multi-Messenger Gravitational-Wave Astronomy journal December 2018
Binary Neutron Star (BNS) Merger: What We Learned from Relativistic Ejecta of GW/GRB 170817A journal July 2019
Measuring the Value of the Hubble Constant “à la Refsdal” journal June 2018
LSST Target-of-opportunity Observations of Gravitational-wave Events: Essential and Efficient journal March 2019
Constraining the Inclinations of Binary Mergers from Gravitational-wave Observations journal May 2019
Low-latency Gravitational-wave Alerts for Multimessenger Astronomy during the Second Advanced LIGO and Virgo Observing Run journal April 2019
Brightening X-Ray Emission from GW170817/GRB 170817A: Further Evidence for an Outflow journal January 2018
Inverse Compton Scattered Merger-nova: Late X-Ray Counterpart of Gravitational-wave Signals from NS–NS/BH Mergers journal January 2018
The Orbit of GW170817 Was Inclined by Less Than 28° to the Line of Sight journal January 2018
A Precise Distance to the Host Galaxy of the Binary Neutron Star Merger GW170817 Using Surface Brightness Fluctuations journal February 2018
The Binary Neutron Star Event LIGO/Virgo GW170817 160 Days after Merger: Synchrotron Emission across the Electromagnetic Spectrum journal March 2018
Evolution of Dark Energy Reconstructed from the Latest Observations journal December 2018
Multi-messenger Extended Emission from the Compact Remnant in GW170817 journal April 2019
Low-latency Gravitational-wave Alerts for Multimessenger Astronomy during the Second Advanced LIGO and Virgo Observing Run other January 2019
Properties of the Binary Neutron Star Merger GW170817 text January 2019
Brightening X-ray Emission from GW170817/GRB170817A: Further Evidence for an Outflow text January 2017
$H_0$ from cosmic chronometers and Type Ia supernovae, with Gaussian Processes and the novel Weighted Polynomial Regression method text January 2018
Observational evidence for Extended Emission to GW170817 text January 2018
A Hubble constant measurement from superluminal motion of the jet in GW170817 preprint January 2018
Dark energy in Horndeski theories after GW170817: A review text January 2018
Unbiased Hubble constant estimation from binary neutron star mergers text January 2018
Low-Latency Gravitational Wave Alerts for Multi-Messenger Astronomy During the Second Advanced LIGO and Virgo Observing Run text January 2019
Calibrating gravitational-wave detectors with GW170817 text January 2019
Theoretical Cosmology text January 2019
A Summary of Multimessenger Science with Neutron Star Mergers preprint January 2019

Figures / Tables (4)