Age-Metallicity Degeneracy at mid-UV Wavelengths

Details Age-Metallicity Degeneracy at mid-UV Wavelengths Age-Metallicity Degeneracy at mid-UV Wavelengths

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009rmxac..37..147b&link_type=abstract

A Long Walk Through Astronomy: A Celebration of Luis Carrasco's 60th Birthday (Eds. E. Recillas, A. Luna, & Y. D. Mayya) Revista

Astronomy and Astrophysics

Astronomy

1

Galaxies: Fundamental Parameters, Galaxies: Stellar Content, Ultraviolet: Galaxies

Scientific paper

The so-called age-metallicity degeneracy, which affects the optical spectral properties of stellar populations, is also present at mid-ultraviolet wavelengths. We give here the results for two reference objects: the Sun (assumed as representative of the turnoff star of a single stellar population) and M 32. Within a theoretical framework, we have explored the properties of the age-metallicity degeneracy by means of 17 spectroscopic indices from 2100 to 3100 Å: our preliminary results show a metallicity sensitivity parameter value of 1.7±1.2, which is compatible with the Worthey's value of 3/2 in the optical interval.

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