2012AJ....144...89R

Query : 2012AJ....144...89R

2012AJ....144...89R - Astron. J., 144, 89 (2012/September-0)

Multiwavelength observations of massive stellar cluster candidates in the Galaxy.

RICHARDS E.E., LANG C.C., TROMBLEY C. and FIGER D.F.

Abstract (from CDS):

The Galaxy appears to be richer in young, massive stellar clusters than previously known, due to advances in infrared surveys that have uncovered deeply embedded regions of star formation. Young, massive clusters can significantly impact the surrounding interstellar medium (ISM) and hence radio observations can also be an important tracer of their activity. Several hundred cluster candidates are now known by examining survey data. Here, we report on multiwavelength observations of six of these candidates in the Galaxy. We carried out 4.9 and 8.5 GHz Very Large Array observations of the radio emission associated with these clusters to obtain the physical characteristics of the surrounding gas, including the Lyman continuum photon flux and ionized gas mass. Spitzer Infrared Array Camera observations were also made of these regions, and provide details on the stellar population as well as the dust continuum and polycyclic aromatic hydrocarbon emission. When compared to the known young, massive clusters in the Galaxy, the six cluster candidates have less powerful Lyman ionizing fluxes and ionize less of the H II mass in the surrounding ISM. Therefore, these cluster candidates appear to be more consistent with intermediate-mass clusters (103-104 M☉).

Abstract Copyright: ∼

Journal keyword(s): evolution - H II regions - local interstellar matter - stars: massive

Simbad objects: 31

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Number of rows : 31
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 RAFGL 205 IR 01 22 48.6 +61 52 15           ~ 15 1
2 LBN 126.70-00.80 HII 01 22 58.059 +61 48 16.67           ~ 89 2
3 [BDS2003] 52 Cl* 01 23 06 +61 51.4           ~ 3 0
4 SH 2-209 HII 04 11 06.7 +51 09 44           ~ 105 0
5 [BDS2003] 65 OpC 04 11 10 +51 10.0           ~ 6 0
6 [BDS2003] 84 Cl* 06 38 28 +00 44.7           ~ 2 0
7 SH 2-283 HII 06 38 29 +00 42.3           ~ 49 0
8 [BDS2003] 95 Cl* 07 16 33 -09 25.3           ~ 3 0
9 LBN 1032 HII 07 16 35 -09 25.7           ~ 37 0
10 [DBS2003] 7 OpC 07 35 24.9 -18 39 12           ~ 21 1
11 SH 2-307 HII 07 35 33 -18 45.6           ~ 61 2
12 [TUW2004] SFO 49b Rad 07 35 34.5 -18 45 32           ~ 2 0
13 [DBS2003] 8 Cl* 07 35 39 -18 48.8           ~ 7 0
14 [DBS2003] 45 Cl* 10 19 11 -58 02.3           ~ 10 1
15 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
16 GUM 29 HII 10 24 14.6 -57 46 58           ~ 219 0
17 NGC 3603 OpC 11 14 57.9 -61 14 32           ~ 1136 1
18 [MCM2005b] 30 Cl* 12 14 32.0 -62 58 49           ~ 16 0
19 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
20 Cl Westerlund 1 OpC 16 47 02.4 -45 51 07           ~ 655 1
21 [DBS2003] 179 OpC 17 11 32.0 -39 10 38           ~ 41 0
22 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
23 GCIRS 16 Cl* 17 45 40.0 -29 00 28           ~ 387 0
24 NAME Arches Cluster Cl* 17 45 50.5 -28 49 28           ~ 792 0
25 NAME Quintuplet Cluster OpC 17 46 13.9 -28 49 48           ~ 561 0
26 NAME 1806-20 Star Cluster OpC 18 08 39.0 -20 24 39           ~ 35 1
27 RSGC 1 OpC 18 37 58 -06 53.0           ~ 117 0
28 Cl Stephenson 2 OpC 18 39 20 -06 01.7           ~ 102 0
29 W 49a SFR 19 10 15.7 +09 06 05           ~ 325 2
30 NAME ECX6-38 Stellar Group Cl* 20 45 37.6 +44 15 21           ~ 3 0
31 3C 423 Rad 20 45 37.87 +44 15 02.8           ~ 21 1

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