News from z ∼ 6 - 10 galaxy candidates found behind gravitational lensing clusters

D. Schaerer, A. Hempel, R. Pello, E. Egami, J. Richard, J. P. Kneib, M. Wise

Research output: Contribution to journalArticlepeer-review


Following up on the detailed results from our searches for z∼ 610 galaxies using gravitional lensing clusters descrived in Richard et al. (2006), we have obtained new observations, which are presented here. For a general overview of the project see Schaerer et al. (2006). First, deep HST/ACS observations in the z-band confirm 17 out of 18 high redshift candidates as optical drop-out objects; the remaining object appears faint and star-like. Second, Spitzer/IRAC images at 3.6, 4.5, 5.8 and 8.0 m have been obtained. 11 out of 18 candidates are in free, uncominated regions. These 11 high-z candidates are undetected, with upper limits which are compatible with their SED if these objects are blue star-forming galaxies at high redshift (see Fig. 1). In conclusion, our new observations corroborate so far the high-z nature of the majority of the candidates.

Original languageEnglish (US)
Pages (from-to)425
Number of pages1
JournalProceedings of the International Astronomical Union
Issue numberS235
StatePublished - Aug 2006


  • Early universe
  • Galaxies:high-redshift
  • Infrared: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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