The Gaia-ESO Survey: a new approach to chemically characterising young open clusters - II. Abundances of the neutron-capture elements Cu, Sr, Y, Zr, Ba, La, and Ce

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Volume 653 (September 2021)

A&A, 653 (2021) A67

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Table 1

Selected spectral lines, with complete atomic data.

Element	λ (Å)	E.P. (eV)	log gf	Ref. log gf		g_L	FIP (eV) ^(a)
				3800–4800 Å (archive)
Sr I	4607.33	0.00	0.28	Bergemann et al. (2012)	2.72 ± 0.07 ± 0.07(LTE)	1.00	5.69
					2.82 ± 0.07 ± 0.07(NLTE)
Sr II	4215.52	0.00	−0.16	Bergemann et al. (2012)	2.87 ± 0.18 ± 0.1(LTE)	1.33	5.69
Y II	4398.01	0.13	−1.00	Hannaford et al. (1982)	2.26 ± 0.10 ± 0.08	1.00	6.38
Zr II	4050.32	0.71	−1.06	Ljung et al. (2006)	2.55 ± 0.08 ± 0.06	0.90	6.84
Zr II	4208.98	0.71	−0.51	Ljung et al. (2006)	2.58 ± 0.11 ± 0.05	0.86	6.84
La II	3988.51	0.40	0.21	Lawler et al. (2001)	1.05 ± 0.07 ± 0.07	1.33	5.58
La II	4086.71	0.00	− 0.07	Lawler et al. (2001)	1.10 ± 0.10 ± 0.06	0.83	5.58
Ce II	4073.47	0.48	0.21	Lawler et al. (2009)	1.55 ± 0.08 ± 0.07	– ^(b)	5.47

				4800–6800 Å (Gaia-ESO)
Cu I	5105.54	1.39	−1.52	Kurucz (2011)	4.21 ± 0.12 ± 0.07	1.10	7.72
Y II	4883.69	1.08	0.07	Hannaford et al. (1982)	2.19 ± 0.08 ± 0.06	1.13	6.38
Y II	5087.42	1.08	−0.17	Hannaford et al. (1982)	2.16 ± 0.07 ± 0.05	1.25	6.38
Zr II	5112.27	1.67	−0.85	Ljung et al. (2006)	2.59 ± 0.06 ± 0.02	0.80	6.84
Ba II	5853.69	0.60	−1.01	McWilliam (1998)	2.31 ± 0.08 ± 0.10	1.07	5.21
Ce II	5274.23	1.04	0.13	Lawler et al. (2009)	1.64 ± 0.06 ± 0.05	–^(b)	5.47

Notes. Atomic data of the lines used in the analysis, both for the bluer (3800− 4800Å) and the redder (4800− 6800Å) ranges. The solar abundances obtained from our analysis are shown in Col. 6. The Landé factor and the FIP are reported in Cols. 7 and 8, respectively. ^(a)FIP values are taken from Table D.1 of Gray (1992). ^(b)Values of the Landé factor for Ce II lines have not been computed due to the complex term of its levels.

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