1997/11/30 by Henk Hoekstra, H. Hoekstra, Marijn Franx +4 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Cluster (spacecraft) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gravitational lens #Hubble's law #Mass distribution #Physics #RADIUS #Redshift #Stellar, planetary, and galactic studies #Strong gravitational lensing #Weak gravitational lensing #astro-ph
paper · pdf · doi:10.1016/s1387-6473(98)00035-9
published as New Astron.Rev. 42 (1998) 137-140 · 22 pages, with 21 figures (3 plots omitted). Revised velocity dispersion and M/L. Accepted for publication in the ApJ. Full version available at http://www.astro.rug.nl/~hoekstra/papers.html
arxiv created 1998/04/07 · openalex publication_date 1998/08/01 · arxiv updated 2009/12/01 · openalex created_date 2017/10/20 · openalex updated_date 2026/08/05
We report on the detection of weak gravitational lensing of faint, distant background galaxies by Cl 1358+62, a cluster of galaxies at a redshift of z=0.33. The observations were made using the HST. The measured shear is consistent with a velocity dispersion of 780+-50 km/s. The weak lensing mass is slightly lower than dynamical estimates and agrees well with X-ray mass estimates. The mass distribution is elongated similar to the light. The axis ratio of 0.30+-0.15 and position angle of -21+-8 degrees were measured directly from the observed shear and agree very well with a previous strong lensing analysis. We estimate the mass-to-light ratio to be 90+-13 h50 Msun/LVsun. The HST point spread function is highly anisotropic at the edges of the individual chips. This systematically perturbs the shapes of objects and we present a method for applying the appropriate correction.