The most massive cluster in a molecular cloud scales with cloud mass and star formation rate, and this scaling is consistent with the integrated cloud-wide IMF model, though the model's key parameters are fitted to the same data.
JWST Observations of Starbursts: Massive Star Clusters in the Central Starburst of M82
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abstract
We present a near infrared (NIR) candidate star cluster catalog for the central kiloparsec of M82 based on new JWST NIRCam images. We identify star cluster candidates using the F250M filter, finding 1357 star cluster candidates with stellar masses $>10^4$ M$_\odot$. Compared to previous optical catalogs, nearly all (87%) of the candidates we identify are new. The star cluster candidates have a median intrinsic cluster radius of $\approx$1 pc and have stellar masses up to $10^6$ M$_\odot$. By comparing the color-color diagram to dust-free yggdrasil stellar population models, we estimate that the star cluster candidates have A$_{\rm V}\sim3-24$ mag, corresponding to A$_{\rm 2.5\mu m}\sim0.3-2.1$ mag. There is still appreciable dust extinction towards these clusters into the NIR. We measure the stellar masses of the star cluster candidates, assuming ages of 0 and 8 Myr. The slope of the resulting cluster mass function is $\beta=1.9\pm0.2$, in excellent agreement with studies of star clusters in other galaxies.
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The most massive star clusters in molecular clouds: Insights from the integrated cloud-wide initial mass function (ICIMF) theory
The most massive cluster in a molecular cloud scales with cloud mass and star formation rate, and this scaling is consistent with the integrated cloud-wide IMF model, though the model's key parameters are fitted to the same data.