Program: GS-2006B-DD-3

Title:A Library of Late Type Spectral Templates in the CO 2.3-2.4mu region at R=5900
PI:Claudia Winge
Co-I(s): Thaisa Storchi-Bergmann, Rogemar Riffel

Abstract

We propose to observe with the GNIRS IFU a good sized sample of spectral template stars at moderate S/N (~50-60), at R=5900 resolution for the region including the CO 2.3-2.4mu overtone bands, to be used as a library for analysis of the stellar kinematic in nearby galaxies both active nuclei and quiescent. At low to moderate S/N, the cross correlation technique is very sensitive to the spectral type of the template star. A late spectral template combined with a low S/N will result in over-estimating the velocity dispersion. Using a combination of templates or testing different spectral types is the best approach, but opposite to what is seen in the optical where a large number of libraries spanning a range of spectral types exists, in the near-IR at R=6000 there are very little if any datasets available.

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