Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Keck Adaptive Optics Imaging of 0.5<z<1 Field Galaxies from the Hubble
  Space Telescope Archive   We have employed natural guide star adaptive optics (AO) on the Keck II
telescope to obtain near-infrared (H and K') images of three field galaxies,
each of redshift greater than 0.5. These are among the highest-redshift
non-active disk galaxies to be imaged with AO. Each of the galaxies was chosen
because it had been observed previously with the Hubble Space Telescope (HST)
Wide Field Planetary Camera 2 (WFPC2) by others. Our AO images in the near
infrared (NIR) closely match both the depth and high spatial resolution of
those optical data. Combining the archival V and I data with our new H and K'
images potentially produces a long wavelength baseline at uniform resolution.
The NIR data probe emission well longward of the 4000-Angstrom break at these
redshifts, and provide stellar fluxes less contaminated by dust. We fit
two-dimensional galaxy bulge-plus-disk models simultaneously in all bands, and
compare stellar-population-synthesis modeling to the photometry of these
separated components. This is an initial foray into combining HST and AO
imaging to produce a high spatial-resolution multi-color dataset for a large
sample of faint galaxies. Our pilot program shows that NIR AO images from large
ground-based observatories, augmented by HST images in the optical, can in
principle provide a powerful tool for the analysis of faint field galaxies.
However, the AO data S/N will have to be increased, and AO PSFs need to be
controlled more carefully than they were here.

14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph