SIMBAD references

2007MNRAS.381L..74K - Mon. Not. R. Astron. Soc., 381, L74-L78 (2007/October-2)

Better age estimation using ultraviolet-optical colours: breaking the age-metallicity degeneracy.

KAVIRAJ S., REY S.-C., RICH R.M., YOON S.-J. and YI S.K.

Abstract (from CDS):

We demonstrate that the combination of GALEX ultraviolet (UV) photometry in the far-UV (FUV; ∼1530 Å) and near-UV (NUV; ∼2310 Å) passbands with optical photometry in the standard U, B, V, R, I filters can efficiently break the age-metallicity degeneracy. We estimate well-constrained ages, metallicities and their associated errors for 42 globular clusters (GCs) in M31, and show that the full set of FUV, NUV, U,B,V,R,I photometry produces age estimates that are ∼90 per cent more constrained and metallicity estimates that are ∼60 per cent more constrained than those produced by using optical filters alone. The quality of the age constraints is comparable or marginally better than those achieved using a large number of spectroscopic indices.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: evolution - galaxies: formation - galaxies: fundamental parameters

Errata: erratum vol. 386, p. L106 (2008)

Simbad objects: 4

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