B. Stalder et al. 2009 ApJS 185 124 doi:10.1088/0067-0049/185/1/124
B. Stalder1,3, K. C. Chambers1 and William D. Vacca2
Show affiliationsWe present a preliminary survey of 58 radio sources within the isoplanatic patches (r < 25'') of bright (11 < R < 12) stars suitable for use as natural guide stars with high-order adaptive optics (AO). An optical and near-infrared imaging survey was conducted utilizing tip-tilt corrections in the optical and AO in the near-infrared. Spectral energy distributions were fit to the multi-band data for the purpose of obtaining photometric redshifts using the Hyperz code. Several of these photometric redshifts were confirmed with spectroscopy, a result that gives more confidence to the redshift distribution for the whole sample. Additional long-wavelength data from Spitzer, SCUBA, SHARC2, and VLA supplement the optical and near-infrared data. We find the sample generally follows and extends the magnitude-redshift relation found for more powerful local radio galaxies. The survey has identified several reasonably bright (H = 19 – 20) objects at significant redshifts (z > 1) that are now within the capabilities of the current generation of AO-fed integral-field spectrographs. These objects constitute a unique sample that can be used for detailed ground-based AO studies of galactic structure, evolution, and active galactic nucleus formation at high redshift.
galaxies: evolution; galaxies: formation; galaxies: fundamental parameters; galaxies: high-redshift
Issue 1 (2009 November)
Received 2009 March 30, accepted for publication 2009 September 14
Published 2009 October 15
B. Stalder et al. 2009 ApJS 185 124
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