Observations of galaxies at z>6. The properties of large, spectroscopic samples

Details Observations of galaxies at z>6. The properties of large, spectroscopic samples Observations of galaxies at z>6. The properties of large, spectroscopic samples

Aug 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007hia....14..252h&link_type=abstract

Highlights of Astronomy, Volume 14, p. 252-252

Astronomy and Astrophysics

Astronomy

Galaxies:High-Redshift, Infrared: Galaxies, Early Universe

Scientific paper

Observed properties of spectroscopically confirmed galaxies at z5 and z6 based on selection from deep, multi-wavelength wide-field samples provide a picture of the current status of the properties of high-redshift galaxies and their evolution to yet higher redshifts.
In the current presentation, we use results of deep, wide-field spectroscopy with the multi-object Deimos spectrograph on Keck in combination with deep, wide-field multi-color imaging studies using the SuprimeCam CCD camera of Subaru for a number of fields, to evaluate the luminosity function of high-redshift galaxies and its evolution at z>6. High-redshift candidates are selected using both narrow-band Lyman alpha emission and broad-band colors with a high success-rate from a number of SuprimeCam (0.5 degree FOV) fields.
Luminosity functions and Lymanα emission line profiles and equivalent widths appear similar between samples at z5.7 and z6.5, and the galaxy distribution is structured both spatially and in redshift. A large amount of cosmic variance is seen in the distribution of z6 galaxies from field to field.
The observed properties are discussed in relationship to their impact on strategies for complementary optical surveys of high-redshift galaxies, and in relationship to surveys at very different wavelengths (X-ray, far-infrared, and submillimeter) that cover the same regions.

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