Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.1007l&link_type=abstract
American Astronomical Society Meeting 208, #10.07; Bulletin of the American Astronomical Society, Vol. 38, p.90
Astronomy and Astrophysics
Astronomy
Scientific paper
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. We show a one-to-one relationship between isochrone differences and broad-band colors and surface brightness fluctuation magnitudes because of alpha-element enhancement. Our results also illustrate a dramatic impact of the convective core overshoot assumption on the predicted broad-band colors for models with ages near 1 Gyr.Support for this work was provided by the NSF through grant AST-0307487, the New Standard Stellar Population Model (NSSPM) project.
Blakeslee John P.
Lee Hyun-chul
Worthey Guy
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