Another cluster of red supergiants close to RSGC1 | Astronomy & Astrophysics (A&A)

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Table 2:

Summary of the stellar properties of the 9 RSGs for which spectral classification was possible.
ID	Spec	$T_{{\rm eff}}(K)$ ^a	(J-K)₀	(J-K)	E(J-K)	A_K^c	M_K^c,d
	type
S1	K5 I	$3840\pm135$	0.75	3.25	2.50	1.68	-9.1
S2	K4 I	$3920\pm112$	0.72	3.54	2.82	1.89	-8.7
S3	M3 I	$3605\pm147$	0.90	3.56	2.66	1.78	-9.9
S4	M6 I	$3400\pm150$	1.05^b	4.59	3.54	2.37	-10.3
S5	K5 I	$3840\pm135$	0.75	3.77	3.02	2.02	-9.9
S6	M2 I	$3660\pm127$	0.87	3.83	2.96	1.98	-9.7
S7	K5 I	$3840\pm135$	0.75	3.40	2.65	1.78	-8.8
S8	M2 I	$3660\pm127$	0.87	3.79	2.92	1.94	-9.4
S9	M1 I	$3745\pm117$	0.85	3.34	2.49	1.67	-9.3

Notes. ^(a) Assumed from the calibration of Levesque et al. (2005),following Davies et al. (2008); ^(b) extrapolated from the calibration; ^(c) typical errors in A_K and M_K are 0.2 mag (see text for discussion); ^(d) assuming a distance of 6.6 kpc, identical to RSGC1.

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