Cluster formation in the LMC

A. Vallenari; A. Moretti; E. V. Held; L. Rizzi; D. Bettoni

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arXiv · astro-ph/0210060

Cluster formation in the LMC

A. Vallenari·A. Moretti·E. V. Held·L. Rizzi·D. Bettoni

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Abstract

In this work we present preliminary results concerning the properties of about 50 clusters and associations located in a densely populated region at the Southern edge of the supershell LMC~4. The ages of the clusters and associations are derived. The cluster formation rate peaks at about 10-20 Myr ago corresponding to the age of the formation of LMC~4. Objects younger than 10 Myr are located close to CO clouds, indicating a possible trigger of the recent star formation by the interaction of the supershell with the interstellar medium. Isophotal analysis has been done for 50% of the clusters. A large number of objects present isophotal distortions commonly interpreted as sign of interaction. Cluster multiplets are coeval within 20 Myr, suggesting a common origin. This indicates that clusters possibly form in large groups. Our findings are in agreement with the unified view of multi-scale star formation, where a size-duration correlation is expected.

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A. Vallenari, A. Moretti, E. V. Held, L. Rizzi, D. Bettoni. 2002-10-02. Cluster formation in the LMC. https://arxiv.org/abs/astro-ph/0210060

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