Sunyaev-Zeldovich effect-derived distances to the high-redshift clusters MS 0451.6-0305 and Cl 0016+16

Erik D. Reese, Joseph J. Mohr, John E. Carlstrom, Marshall Joy, Laura Greco, Gilbert P. Holder, William L. Holzapfel, John P. Hughes, Sandeep K. Patel, Megan Donahue

Research output: Contribution to journalArticlepeer-review


We determine the distances to the z ≃ 0.55 galaxy clusters MS 0451.6-0305 and Cl 0016+16 from a maximum-likelihood joint fit to interferometric Sunyaev-Zeldovich effect (SZE) and X-ray observations. We model the intracluster medium (ICM) using a spherical isothermal β model. We quantify the statistical and systematic uncertainties inherent to these direct distance measurements, and we determine constraints on the Hubble parameter for three different cosmologies. For an ΩM = 0.3, ΩΛ = 0.7 cosmology, these distances imply a Hubble constant of 63+12+21-9 -21 km s-1 Mpc-1, where the uncertainties correspond to statistical followed by systematic at 68% confidence. The best-fit H0 is 57 km s-1 Mpc-1 for an open (ΩM = 0.3) universe and 52 km s-1 Mpc-1 for a flat (ΩM = 1) universe.

Original languageEnglish (US)
Pages (from-to)38-49
Number of pages12
JournalAstrophysical Journal
Issue number1 PART 1
StatePublished - Apr 10 2000


  • Cosmic microwave background
  • Cosmology: observations
  • Distance scale
  • Techniques: interferometric

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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