Spitzer and hubble space telescope constraints on the physical properties of the z ∼ 7 galaxy strongly lensed by A2218

@article{Egami2004SpitzerAH,
  title={Spitzer and hubble space telescope constraints on the physical properties of the z ∼ 7 galaxy strongly lensed by A2218},
  author={E. Egami and J. Kneib and G. Rieke and R. Ellis and J. Richard and J. Rigby and C. Papovich and D. Stark and M. Santos and J. Huang and H. Dole and E. Floc’h and P. Arizona and O. Midi-Pyrenees and Caltech. and Ioa and Cfa},
  journal={The Astrophysical Journal},
  year={2004},
  volume={618}
}
We report the detection of a z ~ 7 galaxy strongly lensed by the massive galaxy cluster A2218 (z = 0.175) at 3.6 and 4.5 μm using the Spitzer Space Telescope and at 1.1 μm using the Hubble Space Telescope. The new data indicate a refined photometric redshift in the range of 6.6-6.8 depending on the presence of Lyα emission. The spectral energy distribution is consistent with having a significant Balmer break, suggesting that the galaxy is in the poststarburst stage with an age of at least ~50… Expand
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