Searching for the first galaxies through gravitational lenses

Details Searching for the first galaxies through gravitational lenses Searching for the first galaxies through gravitational lenses

2006-10-05

arxiv.org/abs/astro-ph/0610138v1

ESO Messenger 125 (2006) 20-23

Astronomy and Astrophysics

Astrophysics

Comments: 4 pages, 4 colour figures, can also be downloaded via http://www.eso.org/gen-fac/pubs/messenger/

Scientific paper

Observing the first galaxies formed during the reionisation epoch, i.e. approximately within the first billion years after the Big Bang, remains one of the challenges of contemporary astrophysics. Several efforts are being undertaken to search for such remote objects. Combining the near-IR imaging power of the VLT and the natural effect of strong gravitational lensing our pilot program has allowed us to identify several galaxy candidates at redshift 6 <~ z <~ 10. The properties of these objects and the resulting constraints on the star formation rate density at high redshift are discussed. Finally we present the status of follow-up observations (ISAAC spectroscopy, HST and Spitzer imaging) and discuss future developments.

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