Appendix A

Examples of Potential Scientific Programs with DEIMOS

A number of representative science programs that can be carried out with DEIMOS are summarized below. On account of its large FOV and long detector array, DEIMOS offers large gains even for single-object spectroscopy and for direct imaging. However, the focus here is on long-slit, multi-object spectroscopy. Report No. 90 for the Keck Telescope demonstrated that many of the key scientific programs of the telescope were in this category. These are the key programs that drove the size of the Nasmyth-Cassegrain field to 20'.

To assess these programs, recall that in one hour on a point source, the S/N per pixel is 21 at V = 22, 12 at V = 23, and 5 at V = 24 with a 600-line grating (Table 1.3). Excellent velocity dispersions, absorption-line strengths, and radial velocities can be measured at S/N = 25. With the multiplexing advantage of multi-slits, several-hour exposures will be feasible.

A.1 Field-Star Metallicities and Motions

A.2 Stars in the Galactic Center

A.3 Metallicities and Kinematics of HII Regions in Nearby Galaxies

A.4 The Structure of Nearby Galaxies - Are Halos Triaxial?

A.5 Globular Clusters in Nearby Galaxies

A.6 Mass Distribution in Early-Type Galaxies

A.7 Field Galaxies and Galaxy Evolution

A.8 AGNs and QSO Absorption Lines

A.9 High-Redshift Group and Cluster Gakaxies

A.10 Cosmological Tests: Ho, qo, and the Fluctuation Spectrum

A.11 Gravitational Lensing