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The Effect Of Alpha-Element Enhancement On Surface Brightness Fluctuation Magnitudes And Broad-Band Colors

Published online by Cambridge University Press:  01 December 2006

Hyun-chul Lee ,
Guy Worthey  and
John P. Blakeslee
Hyun-chul Lee
Affiliation:
Washington State University email: hclee@wsu.edu
Guy Worthey
Affiliation:
Washington State University email: hclee@wsu.edu
John P. Blakeslee
Affiliation:
Washington State University email: hclee@wsu.edu
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Abstract

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We present the effects due to alpha-element enhancement on surface brightness fluctuation magnitudes and broad-band colors in order to investigate the calibration zero-point. We study these effects at ages covering 0.1 to 13 Gyr and metallicities of Z=0.0003 to 0.04 using the Teramo group's isochrones, BaSTI. Our preliminary results indicate that alpha-enhanced models are needed to match massive red galaxies while solar-scaled models are fine for dwarf blue galaxies to reproduce their independently estimated ages and metallicities.

Keywords

Stars: abundancesgalaxies: stellar content

References

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