PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds

doi:10.1093/mnras/stac2559

淡江大學機構典藏 > 理學院 > 物理學系暨研究所 > 期刊論文 > Item 987654321/123362

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题名:	PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds
作者:	Turner, Jordan A;Dale, Daniel A;Lilly, James;..., Hsi-An Pan et al.
关键词:	galaxies: star clusters;galaxies: star formation
日期:	2022-09-11
上传时间:	2023-04-28 17:46:46 (UTC+8)
出版者:	Oxford University Press on behalf of Royal Astronomical Society
摘要:	In the hierarchical view of star formation, giant molecular clouds (GMCs) undergo fragmentation to form small-scale structures made up of stars and star clusters. Here we study the connection between young star clusters and cold gas across a range of extragalactic environments by combining the high resolution (1″) PHANGS–ALMA catalogue of GMCs with the star cluster catalogues from PHANGS–HST. The star clusters are spatially matched with the GMCs across a sample of 11 nearby star-forming galaxies with a range of galactic environments (centres, bars, spiral arms, etc.). We find that after 4 − 6 Myr the star clusters are no longer associated with any gas clouds. Additionally, we measure the autocorrelation of the star clusters and GMCs as well as their cross-correlation to quantify the fractal nature of hierarchical star formation. Young (≤10 Myr) star clusters are more strongly autocorrelated on kpc and smaller spatial scales than the >10 Myr stellar populations, indicating that the hierarchical structure dissolves over time.
關聯:	Monthly Notices of the Royal Astronomical Society, 516(3), p.4612-4626
DOI:	10.1093/mnras/stac2559
显示于类别:	[物理學系暨研究所] 期刊論文

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