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arXiv:astro-ph/0002011 (astro-ph)
[Submitted on 1 Feb 2000 (v1), last revised 1 Nov 2000 (this version, v2)]

Title:Gravitational lens magnification by Abell 1689: Distortion of the background galaxy luminosity function

Authors:S. Dye, A.N. Taylor, E.M. Thommes, K. Meisenheimer, C. Wolf, J.A. Peacock
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Abstract: Gravitational lensing magnifies the luminosity of galaxies behind the lens. We use this effect to constrain the total mass in the cluster Abell 1689 by comparing the lensed luminosities of background galaxies with the luminosity function of an undistorted field. Since galaxies are assumed to be a random sampling of luminosity space, this method is not limited by clustering noise. We use photometric redshift information to estimate galaxy distance and intrinsic luminosity. Knowing the redshift distribution of the background population allows us to lift the mass/background degeneracy common to lensing analysis. In this paper we use 9 filters observed over 12 hours with the Calar Alto 3.5m telescope to determine the redshifts of 1000 galaxies in the field of Abell 1689. Using a complete sample of 151 background galaxies we measure the cluster mass profile. We find that the total projected mass interior to 0.25h^(-1)Mpc is (0.48 +/- 0.16) * 10^(15)h^(-1) solar masses, where our error budget includes uncertainties from the photometric redshift determination, the uncertainty in the off-set calibration and finite sampling. This result is in good agreement with that found by number count and shear-based methods and provides a new and independent method to determine cluster masses.
Comments: 13 pages, 10 figures. Submitted to MNRAS (10/99); Replacement with 1 page extra text inc. new section, accepted by MNRAS
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0002011
  (or arXiv:astro-ph/0002011v2 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0002011
Journal reference: Mon.Not.Roy.Astron.Soc. 321 (2001) 685
Related DOI: https://doi.org/10.1046/j.1365-8711.2001.04204.x

Submission history

From: Simon Dye [view email]
[v1] Tue, 1 Feb 2000 09:33:31 UTC (110 KB)
[v2] Wed, 1 Nov 2000 15:42:02 UTC (118 KB)
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