Long Slit Spectroscopy of M31 at 2 Microns
Session 109 -- Stellar Populations
Display presentation, Saturday, January 15, 9:30-6:45, Salons I/II Room (Crystal Gateway)

## [109.04] Long Slit Spectroscopy of M31 at 2 Microns

M. J. Rieke and G. H. Rieke (Steward Observatory)

M31 has been observed using a new near-infrared spectrometer. A slit 120 arc seconds in length was positioned with the nucleus at the east end. A second set of spectra were taken extending an additional 120 arc seconds to the west. A spectral resolution of 3800 was used to cover the range from 2.25$\mu m$ to 2.35$\mu m$. This range was chosen so that a search for gradient in the strength of CO bands in late-type stars could be carried out simultaneously with a study of the variation of the strength of CaI.

The spectrometer and observations were supported by NSF grant AST-9116442, and NASA provided the NICMOS3 array used to acquire these data.