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1 results

  • Multiple bursts of star formation in young star clusters: The case of the Orion Nebula Cluster

  • Tereza Jerabkova
  • Journal:
    Proceedings of the International Astronomical Union / Volume 14 / Issue S351 / May 2019
    Published online by Cambridge University Press:
    11 March 2020, pp. 200-203
    Print publication:
    May 2019
    • Article
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  • Young star clusters (YSCs) with resolved stellar populations are well suited for studying star-cluster formation. In most cases, the (pre-main-sequence) stellar populations found in the YSCs are coeval with an intrinsic age spread of up to 1Myr. Such observations can be understood as the YSCs having formed in one burst, which star formation was truncated by stellar feedback. The recent discovery that the colour-magnitude diagram of the Orion Nebula Clusters (ONC) contains three well defined age-separated populations appears to shatter this model. The implication is that the ONC formed in three bursts, with star formation still on-going in the last burst. We present new observational results focusing on the three populations in the ONC using OmegaCAM photometry and Gaia DR2 measurements. We also describe a theoretical model which may explain these observations by an interplay between stellar feedback and cluster dynamics.