Probing the anomalous extinction of four young star clusters: the use of colour-excess, main-sequence fitting and fractal analysis

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Table 1

List of the studied clusters.

	l	b	D	d	A_V	F₁₀₀
Cluster	(°)	(°)	(′)	(pc)	mag	10⁷ Jy/Sr

Berkeley 86	76.7	+01.3	12	1585^a	1.7–2.5	12–15
NGC 2244	206.3	–02.1	29	1660^b	0.3–2.2	7–20
NGC 2264	202.9	+02.2	39	760^c	0.9–3.8	3–72
NGC 6530	6.1	–01.3	14	1300^d	3.2–4.2	69–500

Notes. Columns description: (1) identification; (2, 3) galactic coordinates; (4) diameter; (5) distance obtained from:

^(a)

Bhavya et al. (2007);

^(b)

Johnson (1962), Park & Sung (2002);

^(c)

Sung et al. (1997);

^(d)

Mayne & Naylor (2008).

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