Star Cluster in Stochastic Regime

Using the probabilistic technique from Fouesneau, M., Lançon, A., 2010, we derived ages, masses and extinction values of star clusters in the PHAT survey (Johnson et al., 2015).

We find that the cluster age distribution is consistent with being uniform over the past 100 Myr, which suggests a weak effect of cluster disruption within M31.

We find that the mass distribution of the whole sample can be well-described by a single power-law with a spectral index of −1.9 ± 0.1 However, we find that the present day mass spectral index varies significantly with environment with the shallower slope in the highest star formation intensity regions.

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