The AstroStat Slog » synthetic model http://hea-www.harvard.edu/AstroStat/slog Weaving together Astronomy+Statistics+Computer Science+Engineering+Intrumentation, far beyond the growing borders Fri, 09 Sep 2011 17:05:33 +0000 en-US hourly 1 http://wordpress.org/?v=3.4 [ArXiv] Isochrone database, Aug. 20, 2007 http://hea-www.harvard.edu/AstroStat/slog/2007/arxiv-isochrone-database/ http://hea-www.harvard.edu/AstroStat/slog/2007/arxiv-isochrone-database/#comments Thu, 23 Aug 2007 00:55:13 +0000 hlee http://hea-www.harvard.edu/AstroStat/slog/2007/arxiv-isochrone-database-aug-20-2007/ From arxiv/astro-ph:0708.1204v3
An Isochrone Database and a Rapid Model for Stellar Population Synthesis by Li and Han

This paper emphasize the binary population: CMD fitting with the binary population synthetic model outperformed to the single population model. They used Hurley code (Hurley, Tout, and Pols (2002). Evolution of binary stars and the effect of tides on binary populations, MNRAS, 329(4), p.897-928). They mentioned that two color-color grids can disentangle the age-metallicity degeneracy via binary stellar populations. They fitted their isochrone database to M67 and NGC 1868 with the gT-grid and concluded that the database of binary stellar populations fitted the color magnitude diagrams better.

A notable sentence:

According to the work of Li and Han (2007b, arxiv/astro-ph: 0704.1202), (u-R) and (g-J) are sensitive to stellar age while (r-K) and (z-K) to stellar metallicity,

where the upper cases indicate Johnson UBVRIJHK magnitudes and the lower cases SDSS-ugriz magnitudes.

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