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arXiv · 2406.06510

Most nearby young star clusters formed in three massive complexes

Cameren Swiggum·João Alves·Robert Benjamin·Sebastian Ratzenböck·Núria Miret-Roig·Josefa Großschedl·Stefan Meingast·Alyssa Goodman·Ralf Konietzka·Catherine Zucker·Emily L. Hunt·Sabine Reffert
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Abstract

Efforts to unveil the structure of the local interstellar medium and its recent star formation history have spanned the past seventy years. Recent studies utilizing precise data from space astrometry missions have revealed nearby, newly formed star clusters with connected origins. Nonetheless, mapping young clusters across the entire sky back to their natal regions has been hindered by a lack of clusters with precise radial velocity data. Here we show that 155 out of 272 (57 percent) high-quality young clusters within one kiloparsec of the Sun arise from three distinct spatial volumes. This conclusion is based upon the analysis of data from the third Gaia release and other large-scale spectroscopic surveys. Currently dispersed throughout the Solar Neighborhood, their past positions over 30 Myr ago reveal that these families of clusters each formed in one of three compact, massive star-forming complexes. One of these families includes all of the young clusters near the Sun -- the Taurus and Sco-Cen star-forming complexes. We estimate that over 200 supernovae were produced from these families and argue that these clustered supernovae produced both the Local Bubble and the largest nearby supershell GSH 238+00+09, both of which are clearly visible in modern three-dimensional dust maps.

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Cameren Swiggum, João Alves, Robert Benjamin, Sebastian Ratzenböck, Núria Miret-Roig, Josefa Großschedl, Stefan Meingast, Alyssa Goodman, Ralf Konietzka, Catherine Zucker, Emily L. Hunt, Sabine Reffert. 2024-06-10. Most nearby young star clusters formed in three massive complexes. https://doi.org/10.1038/s41586-024-07496-9

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