The Hubble ultra-deep field

The Hubble Ultra Deep Field (UDF) provides us with our deepest view to date of the visible universe. The UDF ACS images cover twice the area of the previous Hubble Deep Fields and are about 1 magnitude deeper. NICMOS near-IR images of the UDF allow us to probe beyond redshift 6, perhaps to the era of reionization. I will discuss this reionization question as well as our own research, which traces the star formation history of the universe from z~6 to today. Our work is based on Bayesian photometric redshifts (BPZ) and our robust photometry which correctly revealed that the UDF NICMOS images were calibrated too faint by about 0.30 & 0.18 mag in the J & H filters, respectively.

 

Fecha: 
24/02/2006 - 13:00
Conferenciante: 
Dan Coe
Filiación: 
Instituto de Astrofísica de Andalucía - CSIC


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