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Synthetic Mg1, Mg2 and Mgb indices

Published online by Cambridge University Press:  07 August 2017

M. Erdelyi-Mendes ,
B. Barbuy  and
A. Milone
M. Erdelyi-Mendes
Affiliation:
IAG-USP, Depto. Astronomia C.P. 9638, SÃo Paulo 01065, Brazil
B. Barbuy
Affiliation:
IAG-USP, Depto. Astronomia C.P. 9638, SÃo Paulo 01065, Brazil
A. Milone
Affiliation:
IAG-USP, Depto. Astronomia C.P. 9638, SÃo Paulo 01065, Brazil

Extract

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A detailed study of strong spectral features is an important link between stellar spectroscopy and low-resolution spectroscopy or photometry of galaxies. The magnesium triplet at λ 517 nm is among the strongest features in the spectra of normal galaxies. A question arises regarding its use as a metallicity indicator for composite systems (e.g., Faber, 1973), given that it is also used as a gravity indicator for individual stars (Clark & McClure, 1979), indicating that the Mg feature shows a bi-parametric behaviour as a function of metallicity and gravity.

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 149: The Stellar populations of Galaxies , 1992 , pp. 415
Copyright
Copyright © Kluwer 

References

Burstein, D., Faber, S.M., Gaskell, C.M., Krumm, N.: 1984, ApJ 287, 586.CrossRefGoogle Scholar
Clark, J.P.A., McClure, R.D.: 1979, PASP 91, 507.CrossRefGoogle Scholar
Faber, S.M.: 1973, ApJ 179, 731.CrossRefGoogle Scholar