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A Precise Distance to the Host Galaxy of the Binary Neutron Star Merger GW170817 Using Surface Brightness Fluctuations

Michele Cantiello, J. B. Jensen, J. P. Blakeslee, E. Berger, A. J. Levan, N. R. Tanvir, G. Raimondo, E. Brocato, K. D. Alexander, P. K. Blanchard, M. Branchesi, Z. Cano (+16 others)
2018 Astrophysical Journal Letters  

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2018 accepted
arXiv:1801.06080v2 fatcat:lbkrquxwt5cznfvvbsngvfi2ju
2018 pre-print
arXiv:1801.06080v1 fatcat:zqcqxrmkjbewvn66ylvlbwfr5y
The joint detection of gravitational waves and electromagnetic radiation from the binary neutron star (BNS) merger GW170817 has provided unprecedented insight into a wide range of physical processes: heavy element synthesis via the r-process; the production of relativistic ejecta; the equation of state of neutron stars and the nature of the merger remnant; the binary coalescence timescale; and a measurement of the Hubble constant via the "standard siren" technique. In detail, all of these
more » ... s depend on the distance to the host galaxy of the merger event, NGC4993. In this paper we measure the surface brightness fluctuation (SBF) distance to NGC4993 in the F110W and F160W passbands of the Wide Field Camera 3 Infrared Channel on the Hubble Space Telescope (HST). For the preferred F110W passband we derive a distance modulus of m-M=33.05±0.08±0.10 mag, or a linear distance d=40.7±1.4±1.9 Mpc (random and systematic errors, respectively); a virtually identical result is obtained from the F160W data. This is the most precise distance to NGC4993 available to date. Combining our distance measurement with the corrected recession velocity of NGC4993 implies a Hubble constant H_0=71.9± 7.1 km s^-1 Mpc^-1. A comparison of our result to the GW-inferred value of H_0 indicates a binary orbital inclination of i ≳ 137 . The SBF technique can be applied to early-type host galaxies of BNS mergers to ∼ 100 Mpc with HST and possibly as far as ∼ 300 Mpc with the James Webb Space Telescope, thereby helping to break the inherent distance-inclination degeneracy of the GW signals at distances where many future BNS mergers are likely to be detected.
doi:10.3847/2041-8213/aaad64 fatcat:fmndoawyffhe5hp6k27xbrgjty
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Michele Cantiello, J. B. Jensen, J. P. Blakeslee, E. Berger, A. J. Levan, N. R. Tanvir, G. Raimondo, E. Brocato, K. D. Alexander, P. K. Blanchard, M. Branchesi, Z. Cano, R. Chornock, S. Covino, P. S. Cowperthwaite, P. D'Avanzo, T. Eftekhari, W. Fong, A. S. Fruchter, A. Grado, J. Hjorth, D. E. Holz, J. D. Lyman, I. Mandel, R. Margutti, M. Nicholl, V. A. Villar, P. K. G. Williams. "A Precise Distance to the Host Galaxy of the Binary Neutron Star Merger GW170817 Using Surface Brightness Fluctuations." Astrophysical Journal Letters 854.2 (2018) L31