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- W2079831519 abstract "The standard technique for measurement of random uncertainties of star formation histories (SFHs) is the bootstrap Monte Carlo, in which the color–magnitude diagram (CMD) is repeatedly resampled. The variation in SFHs measured from the resampled CMDs is assumed to represent the random uncertainty in the SFH measured from the original data. However, this technique systematically and significantly underestimates the uncertainties for times in which the measured star formation rate is low or zero, leading to overly (and incorrectly) high confidence in that measurement. This study proposes an alternative technique, the Markov Chain Monte Carlo (MCMC), which samples the probability distribution of the parameters used in the original solution to directly estimate confidence intervals. While the most commonly used MCMC algorithms are incapable of adequately sampling a probability distribution that can involve thousands of highly correlated dimensions, the Hybrid Monte Carlo algorithm is shown to be extremely effective and efficient for this particular task. Several implementation details, such as the handling of implicit priors created by parameterization of the SFH, are discussed in detail." @default.
- W2079831519 created "2016-06-24" @default.
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- W2079831519 date "2013-09-05" @default.
- W2079831519 modified "2023-10-01" @default.
- W2079831519 title "ON THE ESTIMATION OF RANDOM UNCERTAINTIES OF STAR FORMATION HISTORIES" @default.
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- W2079831519 doi "https://doi.org/10.1088/0004-637x/775/1/76" @default.
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