Evidence of quasi-chemically homogeneous evolution of massive stars up to solar metallicity

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Table 1

Sample stars and observational information.

Star	Optical spectrum	Date of optical observation	Resolution	UV spectrum	Date of UV observation	Resolution

Galaxy

WR 7	VLT/UVES	26−27 Jan. 2008	30 000	IUE sp03541	6 Dec. 1978	250
WR 10	VLT/UVES	26−27 Jan. 2008	30 000	IUE sp10748/sp13912	4 Dec. 1980/6 May 1981	250
WR 18	VLT/UVES	26−27 Jan. 2008	30 000	IUE sp0933	18 May 1980	250
WR 128	NTT/FEROS	3 May 2012	48 000	IUE sp15101	26 Sep. 1981	18 000

LMC

Bat 18	SAAO/GS¹	28 Dec. 1999	900	IUE sp38236/sp38247	24 Fev. 1990	250
		16−20 Jan. 2001
		1−7 Jan. 2002
Bat 63	SAAO/GS¹	28 Dec. 1999	900	IUE sp09157/sp09158	31 May 1980	250
		16−20 Jan. 2001
		1−7 Jan. 2002

Notes.

⁽¹⁾

SAAO/GS stands for SAAO observatory/Grating spectrograph. From Foellmi et al. (2003).

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