Using the bullet cluster as a gravitational telescope to study z ≳ 7 Lyman break galaxies

Nicholas Hall, Maruša Bradač, Anthony H. Gonzalez, Tommaso Treu, Douglas Clowe, Christine Jones, Massimo Stiavelli, Dennis Zaritsky, Jean Gabriel Cuby, Benjamin Clément

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

We use imaging obtained with the Hubble Space Telescope Wide Field Camera 3 to search for z 850 dropouts at z ∼ 7 and J 110 dropouts at z ∼ 9 lensed by the Bullet Cluster. In total we find 10 z 850 dropouts in our 8.27 arcmin2 field. Using magnification maps from a combined weak- and strong-lensing mass reconstruction of the Bullet Cluster and correcting for estimated completeness levels, we calculate the surface density and luminosity function of our z 850 dropouts as a function of intrinsic (accounting for magnification) magnitude. We find results consistent with published blank field surveys, despite using much shallower data, and demonstrate the effectiveness of cluster surveys in the search for z ∼ 7 galaxies.

Original languageEnglish (US)
Article number155
JournalAstrophysical Journal
Volume745
Issue number2
DOIs
StatePublished - Feb 1 2012

Keywords

  • galaxies: high-redshift
  • gravitational lensing: strong
  • gravitational lensing: weak

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Hall, N., Bradač, M., Gonzalez, A. H., Treu, T., Clowe, D., Jones, C., Stiavelli, M., Zaritsky, D., Cuby, J. G., & Clément, B. (2012). Using the bullet cluster as a gravitational telescope to study z ≳ 7 Lyman break galaxies. Astrophysical Journal, 745(2), [155]. https://doi.org/10.1088/0004-637X/745/2/155