**title** Asp Conference Series, Vol. **volume***, **year of Publication** **names of Editors** Sauron Observations of Disks in Spheroids

The panoramic integral-field spectrograph SAURON is currently being used to map the stellar kinematics, gaseous kinematics, and stellar populations of a large number of early-type galaxies and bulges. Here, we describe SAURON observations of cold stellar disks embedded in spheroids (NGC 3384, NGC 4459, NGC 4526), we illustrate the kinematics and ionization state of large-scale gaseous disks (NGC 4278, NGC 7742), and we show preliminary comparisons of SAURON data with barred galaxy N-body simulations (NGC 3623). 1. Introduction The physical properties of early-type galaxies correlate with luminosity and environment , as exemplified by the morphology-density relation (Dressler 1980) and the dependence of color, metal content, isophotal shape, nuclear cusp slope, and dynamical support on luminosity (e.g. Bender & Nieto 1990; Faber et al. 1997). It is unclear to what extent these properties were acquired at the epoch of galaxy formation or result from subsequent dynamical evolution. Progress toward answering these and related issues requires a systematic investigation of the kinematics and line-strengths of a representative sample of early-type galaxies. The intrinsic shape, internal orbital structure, and radial dependence of the mass-to-light ratio are constrained by the stellar and gas kine-matics (e.g. SAURON contributions to these two complementary approaches are discussed in turn by Bacon et al. (2002) and Emsellem et al. (2002) in these proceedings. Here, we focus on the importance of disks in spheroids. In the current context of hierarchical (i.e. merger-driven) structure formation, the dichotomy in the properties of early-type galaxies (e.g. Faber et al. 1997) is often explained by the mass ratio of the progenitor galaxies (e. revealed by SAURON, the presence of cold disks in a large number of spheroids suggests a non-negligible role for dissipation, reminiscent of the old galaxy formation debate between merging (Searle & Zinn 1978) and dissipational collapse (Eggen, Lynden-Bell, & Sandage 1962). After reviewing the core properties of the SAURON instrument and sample (§ 2), we present in § 3 SAURON observations of a few cold central stellar disks embedded spheroids. We also illustrate the emission line distributions and kinematics of large-scale gaseous disks in § 4, and compare generic N-body simulations of barred galaxies with SAURON data in § 5.