Properties of luminous red supergiant stars in the Magellanic Clouds

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Volume 669 (January 2023)

A&A, 669 (2023) A86

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Table 2

Observational properties.

ID	Obs. Date (UT)	Exp. time (s)	S/N	RV (km s⁻¹)	New spectral Type	Previous spectral Type	References
SMC1	19-Dec.-2018	3 × 200	80	155 ± 4	A0 I[e]	B8 I[e], A1 I[e]	Zickgraf et al. (1992), Kraus et al. (2008)
SMC2	19-Dec.-2018	3 × 180	85	189 ± 10	F8 I
SMC3	13-Nov.-2019	3 × 100	95	178 ± 7	M2 I	K/M	Sanduleak (1989)
SMC4	12-Sep.-2019	3 × 600	65		C0-2,2e	C3,2e	Groenewegen & Blommaert (1998)
SMC5	13-Nov.-2019	3 × 300	20		M7e III	K5/M7e	Wood et al. (1983)
LMC1	12-Nov.-2019	3 × 200	60	272 ± 8	M2 I	M0:	Westerlund et al. (1981)
LMC2	13-Nov.-2019	3 × 150	45	306 ± 11	M4–5 II–III	M6	Reid et al. (1990)
LMC3	08-Mar.-2020	3 × 180,1 ×240	55	260±6	M3 I	M2	Chen et al. (2016)
LMC4	08-Mar.-2020	3 × 180	50	296 ± 6	M0 I	M0.5	Chen et al. (2016)
LMC5	08-Mar.-2020	3 × 100	55	290 ± 5	M1 I	M0	Westerlund et al. (1981)
LMC6	08-Mar.-2020	3 × 100	75	318±5	M1 I	M1 I:	Samus’ et al. (2017)
LMC7	08-Mar.-2020	3 × 180	70	316±9	M2 I	M3/M4	Reid et al. (1990)
LMC8	08-Mar.-2020	3 × 120, 1 × 100	65	304±5	M3 I	M2	Egan et al. (2001)
LMC9	08-Mar.-2020	3 × 180	70		H II + LBVc	YSO:	Seale et al. (2009)

Notes. The signal-to-noise ratio (S/N) of the combined spectrum is measured in the red (~8500 Å). No previous luminosity classes were indicated for most stars. The previous classification of LMC6 included a luminosity class, but this was an uncertain classification.

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