2003AJ....126.1896R

Query : 2003AJ....126.1896R

2003AJ....126.1896R - Astron. J., 126, 1896-1904 (2003/October-0)

Discovery of a young massive stellar cluster associated with IRAS source 16177-5018.

ROMAN-LOPES A., ABRAHAM Z. and LEPINE J.R.D.

Abstract (from CDS):

We report the discovery of a young massive stellar cluster embedded in an extended H II region, invisible at optical wavelengths where the extinction is AV~28 mag, associated with the IRAS source 16177-5018. J-, H-, and narrowband K-imaging photometry combined with the KsTwo Micron All Sky Survey data show the presence of sources with excess infrared emission at 2.2 µm, concentrated in an area of about 1 pc2 around a massive young stellar object identified as the IRAS source. This object has a near mid-infrared spectral index between 2.2 and 25 µm α(IR)=dlog(λFλ)/dlogλ=4.78, characteristic of compact H II regions, with bolometric luminosity inferred from the integrated near-to-far-infrared flux density of 2.8x105L☉, which corresponds to a zero-age main-sequence star of about 42 M☉. From the color-magnitude diagram we were able to classify the majority of the cluster members as reddened massive stars earlier than spectral type B5.

Abstract Copyright: ∼

Journal keyword(s): ISM: Dust, Extinction - ISM: H II Regions - infrared: stars - Stars: Formation - Stars: Pre-Main-Sequence

Nomenclature: Table 1: [RAL2003] IRS NN (Nos 1-41).

CDS comments: Young cluster = [DBS2003] 165.

Simbad objects: 43

goto Full paper

goto View the references in ADS

Number of rows : 43
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 GAL 332.80-00.60 HII 16 19 47 -51 04.1           ~ 103 1
2 [RAL2003] IRS 25 IR 16 21 26.42 -50 24 47.0           ~ 1 0
3 [RAL2003] IRS 36 IR 16 21 27.82 -50 26 21.7           ~ 1 0
4 [RAL2003] IRS 33 IR 16 21 27.95 -50 26 18.5           ~ 1 0
5 2MASS J16212803-5024426 NIR 16 21 28.03 -50 24 42.6           ~ 1 0
6 2MASS J16212843-5025356 NIR 16 21 28.44 -50 25 35.7           ~ 1 0
7 2MASS J16212848-5024343 NIR 16 21 28.49 -50 24 34.4           ~ 1 0
8 2MASS J16212879-5024099 NIR 16 21 28.80 -50 24 09.9           ~ 1 0
9 2MASS J16212892-5025001 NIR 16 21 28.93 -50 25 00.2           ~ 1 0
10 [RAL2003] IRS 23 IR 16 21 29.39 -50 24 49.4           ~ 1 0
11 2MASS J16212947-5027167 NIR 16 21 29.4653687208 -50 27 16.288398900           ~ 1 0
12 2MASS J16212951-5024449 NIR 16 21 29.51 -50 24 44.9           ~ 1 0
13 [RAL2003] IRS 20 IR 16 21 29.53 -50 25 00.9           ~ 1 0
14 2MASS J16212964-5024024 NIR 16 21 29.64 -50 24 02.5           ~ 1 0
15 [RAL2003] IRS 21 IR 16 21 30.09 -50 25 23.3           ~ 1 0
16 [RAL2003] IRS 17 IR 16 21 30.38 -50 25 25.1           ~ 1 0
17 2MASS J16213046-5025043 NIR 16 21 30.46 -50 25 04.3           ~ 1 0
18 2MASS J16213052-5025145 * 16 21 30.5146026576 -50 25 14.603002752           ~ 1 0
19 [RAL2003] IRS 8 IR 16 21 30.56 -50 25 19.2           ~ 1 0
20 2MASS J16213077-5024571 NIR 16 21 30.77 -50 24 57.1           ~ 1 0
21 [RAL2003] IRS 13 IR 16 21 30.89 -50 25 07.2           ~ 1 0
22 2MASS J16213091-5024407 NIR 16 21 30.91 -50 24 40.7           ~ 1 0
23 [DBS2003] 165 Cl* 16 21 31 -50 25.1           ~ 5 0
24 2MASS J16213101-5025260 NIR 16 21 31.01 -50 25 26.1           ~ 1 0
25 2MASS J16213110-5025151 NIR 16 21 31.11 -50 25 15.2           ~ 1 0
26 [RAL2003] IRS 10 IR 16 21 31.12 -50 24 51.9           ~ 1 0
27 2MASS J16213135-5024579 NIR 16 21 31.36 -50 24 57.9           ~ 1 0
28 IRAS 16177-5018 HII 16 21 31.4 -50 25 04           ~ 36 0
29 MSX6C G333.3072-00.3666 * 16 21 31.60 -50 25 08.3           O3If/O3-O5V 4 0
30 2MASS J16213168-5025318 NIR 16 21 31.69 -50 25 31.8           ~ 1 0
31 2MASS J16213184-5024459 NIR 16 21 31.84 -50 24 46.0           ~ 1 0
32 2MASX J16213188-5025042 IR 16 21 31.886 -50 25 04.26           ~ 1 0
33 2MASS J16213221-5025096 NIR 16 21 32.22 -50 25 09.7           ~ 1 0
34 2MASS J16213303-5025046 NIR 16 21 33.03 -50 25 04.6           ~ 1 0
35 2MASS J16213341-5025185 NIR 16 21 33.42 -50 25 18.5           ~ 1 0
36 2MASS J16213351-5025465 NIR 16 21 33.52 -50 25 46.5           ~ 1 0
37 2MASS J16213366-5025313 NIR 16 21 33.6531292416 -50 25 31.324600128           ~ 1 0
38 2MASS J16213392-5025414 NIR 16 21 33.92 -50 25 41.4           ~ 1 0
39 2MASS J16213394-5024315 NIR 16 21 33.94 -50 24 31.5           ~ 1 0
40 2MASS J16213411-5025279 NIR 16 21 34.12 -50 25 28.0           ~ 1 0
41 [RAL2003] IRS 35 IR 16 21 34.86 -50 24 36.6           ~ 1 0
42 2MASS J16213538-5024596 Y*? 16 21 35.39 -50 24 59.6           ~ 2 0
43 2MASS J16213595-5026084 NIR 16 21 35.95 -50 26 08.4           ~ 1 0

To bookmark this query, right click on this link: simbad:objects in 2003AJ....126.1896R and select 'bookmark this link' or equivalent in the popup menu