Lyman break galaxies at z>6

Details Lyman break galaxies at z>6 Lyman break galaxies at z>6

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hia....14..246b&link_type=abstract

Highlights of Astronomy, Volume 14, p. 246-246

Astronomy and Astrophysics

Astronomy

1

Galaxies: Evolution, Galaxies: Formation, Galaxies: High-Redshift

Scientific paper

Extending the study of star-forming galaxies to z>6 is extremely difficult due to the faintness of the sources and the challenging nature of deep near-infrared observations. Nevertheless, current observations are now just good enough that we can begin drawing some conclusions about the nature of galaxies at z7. At present, deep near-infrared observations with NICMOS (reaching 27 AB mag at 5σ) cover more than 20arcmin2 of area with deep optical coverage and allow us to identify four strong z7 8 candidates. Comparing this sample with dropout samples at later times (z4 6), we are able to study evolution in the rest-frame UV LF over the range z8 to z4. We find strong evidence for significant evolution in the characteristic luminosity with time (brightening by ˜2 mag, from z8 to z4). The observed evolution appears to be the direct result of hierarchical growth in the galaxy population.

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