PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds
學年 111
學期 1
出版（發表）日期 2022-09-11
作品名稱 PHANGS: constraining star formation time-scales using the spatial correlations of star clusters and giant molecular clouds
作品名稱（其他語言）
著者 Jordan A Turner; Daniel A Dale; James Lilly; ..., Hsi-An Pan et al.
單位
出版者
著錄名稱、卷期、頁數 Monthly Notices of the Royal Astronomical Society, 516(3), p.4612-4626
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.
關鍵字 galaxies: star clusters;galaxies: star formation
語言 en
ISSN 1365-2966;0035-8711
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 是
國別 GBR
公開徵稿
出版型式 ,電子版
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/123362 )