Modelling the Mg[b] Spectroscopic Index with the Tunable Filters of OSIRIS

Details Modelling the Mg[b] Spectroscopic Index with the Tunable Filters of OSIRIS Modelling the Mg[b] Spectroscopic Index with the Tunable Filters of OSIRIS

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005rmxac..24..225c&link_type=abstract

II International GTC Workshop: Science with GTC 1st-light Instruments and the LMT (Eds. A. M. Hidalgo-Gámez, J. J. González, J.

Astronomy and Astrophysics

Astronomy

Galaxies: Evolution, Galaxies: Star Formation

Scientific paper

We present our first attempt to model a new metallicity indicator for old and intermediate aged stellar populations on the basis of the Mg[b] absorption index at λ ˜ 5175 Å. Model spectra of stellar populations are convolved with the responses of the Tunable Filters of OSIRIS-GTC to provide a photometric index matching the spectroscopic Mg[b]. The new index allows us to obtain galaxy images of this feature on the basis of a photometric approach, without the very high signal-to-noise requirements of the spectroscopic methods.

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