Discovery of a young and massive stellar cluster - Spectrophotometric near-infrared study of Masgomas-1

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Volume 541 (May 2012)

A&A, 541 (2012) A75

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Table 2

Spectroscopically observed stars.

ID	RA (J2000)	Dec (J2000)	J	H	K_S	Spectral type	A_{K_S}	Distance
	[^h ^m ^s]	[° ′ ′′]	[mag]	[mag]	[mag]		[mag]	[kpc]

Star cluster candidates:
1	18 50 17.398	+00 22 04.77	14.843	13.101	12.204	B1 V	1.83	3.69
3	18 50 19.420	+00 21 41.15	14.089	12.051	10.925	O9 V	2.21
4	18 50 16.434	+00 21 31.44	14.316	12.671	11.839	B0 V	1.74
5	18 50 16.555	+00 21 21.69	13.817	11.987	11.033	O9.5 V	1.95
6	18 50 16.500	+00 21 07.01	13.976	12.193	11.162	B0 V	1.96
7	18 50 17.481	+00 20 56.26	14.307	12.438	11.400	O9.5 V	2.03
8	18 50 15.903	+00 20 44.31	13.821	12.261	11.317	O9.5–B0 V	1.76
9	18 50 16.185	+00 20 35.77	14.958	12.848	11.603	O9.5 V	2.33
11	18 50 23.945	+00 19 57.52	13.762	11.880	10.995	O9 V	1.95
12	18 50 23.091	+00 19 47.64	13.535	11.496	10.456	O9 V	2.15
13	18 50 22.271	+00 19 28.18	15.505	13.357	12.205	B0 V	2.29
15	18 50 17.303	+00 20 59.01	14.889	12.955	11.843	B0 V	2.12
16	18 50 16.837	+00 21 12.35	13.697	12.006	10.999	B0 V	1.90
17	18 50 17.036	+00 21 46.69	14.326	12.485	11.471	B0 V	2.00
19	18 50 13.554	+00 21 03.23	13.606	11.895	10.981	B0 V	1.84
20	18 50 12.329	+00 20 46.68	14.829	13.25	11.96	B0 V	2.00
21	18 50 10.573	+00 20 25.64	13.727	12.028	11.071	O9.5 V	1.87
s01	18 50 17.623	+00 21 30.65	10.812	8.893	7.839	A2 I	1.89
s03	18 50 15.408	+00 20 58.07	9.232	6.625	5.299	M2 I	1.99
s04	18 50 15.620	+00 21 07.46	9.563	6.984	5.649	M2 I	1.98
s05	18 50 14.117	+00 22 39.56	9.300	6.477	4.938	M1 I	2.25

Fore-/background stars:
2	18 50 21.558	+00 21 52.31	13.720	12.636	12.054	A0 V	1.10	1.18
10	18 50 14.005	+00 20 06.94	11.281	9.966	9.472	G9–K2 III	0.74	1.32
14	18 50 20.709	+00 21 17.59	10.994	9.638	9.065	G9–K2 III	0.82	1.06
18	18 50 15.788	+00 21 46.06	10.752	9.775	9.391	G0 III	0.61	0.81
22	18 50 10.445	+00 21 03.80	10.499	9.603	9.143	G9–K2 III	0.44	1.31
23	18 50 08.513	+00 22 11.42	11.019	9.528	8.94	G6 III	1.01	0.67
s02	18 50 28.354	+00 21 13.44	11.348	8.935	7.818	K–M I–III	···	···

Notes. Equatorial coordinates, near-infrared magnitudes (J, H, and K_S), and spectral classification are given for all stars. For those stars with determined luminosity class are given also the estimated extinction and distance.

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