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JWST Observations of Starbursts: Massive Star Clusters in the Central Starburst of M82

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arxiv 2408.04135 v2 pith:PI4BHJQK submitted 2024-08-08 astro-ph.GA

Rebecca C. Levy , Alberto D. Bolatto , Divakara Mayya , Bolivia Cuevas-Otahola , Elizabeth Tarantino , Martha L. Boyer , Leindert A. Boogaard , Torsten Böker
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Serena A. Cronin Daniel A. Dale Keaton Donaghue Kimberly L. Emig Deanne B. Fisher Simon C. O. Glover Rodrigo Herrera-Camus María J. Jiménez-Donaire Ralf S. Klessen Laura Lenkić Adam K. Leroy Ilse De Looze David S. Meier Elisabeth A. C. Mills Juergen Ott Mónica Relaño Sylvain Veilleux Vicente Villanueva Fabian Walter Paul P. van der Werf
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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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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. The Co-Evolution of Stellar Wind-blown Bubbles and Photoionized Gas I: Physical Principles and a Semi-Analytic Model

    astro-ph.GA 2025-05 conditional novelty 6.0 of 10

    A new semi-analytic model treats wind-blown bubbles and photoionized gas as coupled regions, and predicts the combined momentum differs by up to 25% from naive estimates in typical star-forming clouds.

  2. The most massive star clusters in molecular clouds: Insights from the integrated cloud-wide initial mass function (ICIMF) theory

    astro-ph.GA 2025-06 conditional novelty 5.0 of 10

    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 th...

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