ESPRESSO observations of HE 0107−5240 and other CEMP-no stars with [Fe/H] ≤ –4.5

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Table 1.

Targets observed in our ESPRESSO GTO program.

Star	GaiaG	T_eff	log g	[Fe/H]	[C/Fe]	RUWE ^(a)
	(mag)	(K)	(cgs)
HE 0107−5240¹	14.9	5100	2.2	−5.39	4.00	1.01
SDSS J0023+0307^2, 3	17.6	6140	4.8	< − 5.50	> 3.31	0.95
HE 0233−0343⁴	15.3	6100	3.4	−4.68	3.32	1.02
SMSS 0313−6708⁵	14.5	5125	2.3	< − 7.10	> 5.39	1.02
HE 0557−4840⁶	15.2	4900	2.2	−4.75	1.66	1.07
SDSS J1313−0019^7, 8	15.2	5170	2.6	−5.00	3.00	0.99
HE 1327−2326⁹	13.4	6180	3.7	−5.60	4.26	0.98
SMSS 1605−1443¹⁰	15.4	4850	2.0	−6.21	3.89	1.06

Notes.

^(a)

The Renormalised Unit Weight Error could be used to detect variability (see text).

References. (1) Christlieb et al. (2002b; (2) Aguado et al. (2018b); (3) Aguado et al. (2019); (4) Hansen et al. (2014); (5) Keller et al. (2014); (6) Norris et al. (2007); (7) Allende Prieto et al. (2015); (8) Frebel et al. (2015); (9) Frebel et al. (2005); (10) Nordlander et al. (2019).

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