Towards a calibration of SSP models from the optical to the mid-infrared

Details Towards a calibration of SSP models from the optical to the mid-infrared Towards a calibration of SSP models from the optical to the mid-infrared

2007-01-31

arxiv.org/abs/astro-ph/0701911v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figure, to appear in the proceedings of IAU Symposium No241 "Stellar Populations as building blocks of galaxies", A

Scientific paper

10.1017/S1743921307007855

Our knowledge about unresolved stellar systems comes from comparing integrated-light properties to SSP models. Therefore it is crucial to calibrate the latter as well as possible by integrated-light colors of clusters that have reliable ages and metallicities (deep CMDs and/or spectroscopy of individual giants). This is especially true for the NIR and MIR, which contain important population synthesis diagnostics and are often used to derive masses of stellar systems at hight redshifts. Here we present integrated colors of MC clusters using new VRI photometry and 2MASS data. In the imminent future we will include MIR data from Spitzer/IRAC. We compare our new colors with popular SSP models to illustrate their strengths and weaknesses.

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