Significance mode analysis (SigMA) for hierarchical structures - An application to the Sco-Cen OB association

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Table 1.

Overview of the clustering algorithms that we test with synthetic data (simulated cluster samples) and compare to SigMA.

Algorithm	Main reference	Short description	For example, used by ^(b)
DBSCAN	Ester et al. (1996)	A density-based	Castro-Ginard et al. (2019, 2020, 2022), Zari et al. (2019),
		Clustering algorithm	Fürnkranz et al. (2019), Hunt & Reffert (2021)
HDBSCAN ^(a)	Campello et al. (2013)	A hierarchical density-based	Kounkel & Covey (2019), Kounkel et al. (2020),
		Clustering algorithm	Hunt & Reffert (2021, 2023), Kerr et al. (2021)

Notes. The results are listed in Table 2.

^(a)

See Appendix B.1 for further discussion on the HDBSCAN algorithm.

^(b)

The reference lists are not exhaustive literature reviews but are intended to highlight the relevance of the proposed comparison methods.

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