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arXiv:astro-ph/0404131 (astro-ph)
[Submitted on 6 Apr 2004]

Title:Observing z>7 sources with the GTC

Authors:R. Pello (1), D. Schaerer (2 and 1), J. Richard (1), J. -F. Le Borgne (1), J. -P. Kneib (3 and 1) ((1) Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrenees, France, (2) Observatoire de Geneve, Switzerland, (3) Caltech Astronomy, USA)
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Abstract: We present the first results obtained from our pilot ultra-deep near-IR survey with ISAAC/VLT, aimed at the detection of z>7 sources using lensing clusters as natural Gravitational Telescopes. Evolutionary synthesis models of PopIII and extremely metal-poor starbursts have been used to derive observational properties expected for these high-z galaxies, such as expected magnitudes and colors, line fluxes for the main emission lines, etc. These models have allowed us to define fairly robust selection criteria to find z~ 7-10 galaxies based on broad-band near-IR photometry in combination with the traditional Lyman drop-out technique. The magnification in the core of lensing clusters improves the search efficiency and subsequent spectroscopic follow up. The method used to identify sources and the first results obtained are presented, in particular the first spectroscopic confirmation of a z=10 candidate. The research efficiency will be significantly improved by the future near-IR multi-object facilities such as EMIR/GTC and KMOS/VLT-2, and later by the JWST.
Comments: 5 Latex pages, 4 figures, Proceedings of the II International Workshop on Science with the GTC, February 15-17, 2004. To be published in Rev.Mex.A.A. CS
Subjects: Astrophysics (astro-ph)
Cite as: arXiv:astro-ph/0404131
  (or arXiv:astro-ph/0404131v1 for this version)
  https://doi.org/10.48550/arXiv.astro-ph/0404131

Submission history

From: Roser Pello [view email]
[v1] Tue, 6 Apr 2004 13:22:47 UTC (143 KB)
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