2010A&A...513A..74N


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST20:52:21

2010A&A...513A..74N - Astronomy and Astrophysics, volume 513, A74-74 (2010/4-1)

Another cluster of red supergiants close to RSGC1.

NEGUERUELA I., GONZALEZ-FERNANDEZ C., MARCO A., CLARK J.S. and MARTINEZ-NUNEZ S.

Abstract (from CDS):

Recent studies have revealed massive star clusters in a region of the Milky Way close to the tip of the Long Bar. These clusters are heavily obscured and are characterised by a population of red supergiants. We analyse a previously unreported concentration of bright red stars ∼16' away from the cluster RSGC1 We utilised near IR photometry to identify candidate red supergiants and then K-band spectroscopy of a sample to characterise their properties. We find a compact clump of eight red supergiants and five other candidates at some distance, one of which is spectroscopically confirmed as a red supergiant. These objects must form an open cluster, which we name Alicante 8. Because of the high reddening and strong field contamination, the cluster sequence is not clearly seen in 2MASS or UKIDSS near-IR photometry. From the analysis of the red supergiants, we infer an extinction AKS=1.9 and an age close to 20Myr. Though this cluster is smaller than the three known previously, its properties still suggest a mass in excess of 10000M. Its discovery corroborates the hypothesis that star formation in this region has happened on a wide scale between ∼10 and ∼20Myr ago.

Abstract Copyright:

Journal keyword(s): stars: evolution - supergiants - Galaxy: structure - open clusters and associations: individual: Alicante 8

Nomenclature: Cl Alicante N (No. 8) added. RSGC N (No. 4) added. Table 1: [NGM2010] SNNN (Nos S1-S14, S101-S109).

Simbad objects: 44

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Number of rows : 44

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5669 1
2 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1736 1
3 NAME Crux-Scutum Spiral Arm reg 12 30 -60.0           ~ 275 0
4 Cl Westerlund 1 OpC 16 47 04.00 -45 51 04.9           ~ 464 0
5 * alf Her A LP* 17 14 38.852741 +14 23 25.33577   4.67 3.33     M5Ib-II 429 0
6 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11542 0
7 V* AX Sgr s*r 18 08 26.5116566609 -18 33 07.939243877   11.34 9.20     K0Ia 74 0
8 HD 171149 * 18 33 22.7082277906 -05 54 42.188230336   6.381 6.354     B9V 43 0
9 NGC 6649 OpC 18 33 27 -10 24.2   10.35 8.9     ~ 102 0
10 2MASS J18342680-0715279 sg? 18 34 26.8147560609 -07 15 28.090086897           ~ 1 0
11 2MASS J18342737-0716191 sg? 18 34 27.374 -07 16 19.10         14.25 ~ 1 0
12 2MASS J18342865-0709573 sg? 18 34 28.6573346669 -07 09 57.379083751         15.47 ~ 1 0
13 2MASS J18344155-0711388 sg? 18 34 41.553 -07 11 38.84           M2I 1 0
14 2MASS J18344294-0713121 sg? 18 34 42.9435149271 -07 13 12.184098098         13.41 ~ 1 0
15 2MASS J18344355-0713296 sg? 18 34 43.5597428676 -07 13 29.715921562           K5I 1 0
16 2MASS J18344391-0714469 sg? 18 34 43.9165190940 -07 14 47.040967446         14.47 ~ 1 0
17 2MASS J18344450-0714153 sg? 18 34 44.5087832348 -07 14 15.359969686           M2I 1 0
18 2MASS J18344581-0718361 sg? 18 34 45.810 -07 18 36.17           M1I 1 0
19 2MASS J18345000-0714262 sg? 18 34 50.0050673441 -07 14 26.322866944         17.49 M3I 1 0
20 2MASS J18345086-0718119 sg? 18 34 50.8656499861 -07 18 11.842038216         15.72 ~ 1 0
21 Cl Alicante 8 OpC 18 34 51.0 -07 14 00           ~ 21 0
22 2MASS J18345101-0714005 sg? 18 34 51.0187475417 -07 14 00.442622666           M6I 1 0
23 2MASS J18345133-0713162 sg? 18 34 51.3360214051 -07 13 16.230481686           K5I 1 0
24 2MASS J18345511-0715108 sg? 18 34 55.1149028818 -07 15 10.832025222           K4I 1 0
25 2MASS J18345676-0711449 sg? 18 34 56.7679581899 -07 11 44.900208400         15.40 ~ 1 0
26 2MASS J18345836-0714151 sg? 18 34 58.363 -07 14 15.12         14.77 ~ 1 0
27 2MASS J18345840-0714247 sg? 18 34 58.404 -07 14 24.78         17.51 K5I 1 0
28 2MASS J18350032-0707374 sg? 18 35 00.3349042305 -07 07 37.432313334           ~ 1 0
29 2MASS J18350241-0709334 sg? 18 35 02.4231967693 -07 09 33.379939346         15.11 ~ 1 0
30 2MASS J18350666-0718552 sg? 18 35 06.6678613759 -07 18 55.230291878         15.08 ~ 1 0
31 2MASS J18350759-0718473 sg? 18 35 07.5897660544 -07 18 47.377562307         15.36 ~ 1 0
32 MSX6C G024.6265+00.2856 s?r 18 35 10.89024 -07 15 17.8020           ~ 2 0
33 2MASS J18351687-0713269 sg? 18 35 16.875 -07 13 26.91         17.20 ~ 1 0
34 NGC 6664 OpC 18 36 37 -07 48.8   8.81 7.8     ~ 102 0
35 RSGC 1 OpC 18 37 58 -06 53.0           ~ 87 0
36 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 82 0
37 Cl Trumpler 35 OpC 18 42 54 -04 08.0   10.44 9.2     ~ 64 0
38 RSGC 3 OpC 18 45 20.0 -03 24 43           ~ 46 0
39 NAME Sgr Arm PoG 19 00 -30.0           ~ 523 1
40 W 51 SNR 19 23 50 +14 06.0           ~ 1143 1
41 V* RW Cep s*r 22 23 07.0152079533 +55 57 47.616196874 11.25 8.87 6.65 4.94 3.78 K2_0-Ia 149 0
42 NGC 7419 OpC 22 54 20 +60 48.9     13.0     ~ 85 0
43 NAME Scutum Spiral Arm PoG ~ ~           ~ 275 0
44 NAME Galactic Bar reg ~ ~           ~ 894 0

    Equat.    Gal    SGal    Ecl

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2020.07.14-20:52:21

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