2011AJ....141..153A

Query : 2011AJ....141..153A

2011AJ....141..153A - Astron. J., 141, 153 (2011/May-0)

Submillimeter and molecular views of three galactic ring-like H II regions.

ARVIDSSON K. and KERTON C.R.

Abstract (from CDS):

We use SCUBA 850 µm and CO observations to analyze the surroundings of three Galactic ring-like H II regions, KR 7, KR 81, and KR 120 (Sh 2-124, Sh 2-165, and Sh 2-187), with the aim of finding sites of triggered star formation. We find one prominent submillimeter (sub-mm) source for each region, located at the interface between the H II region and its neutral surroundings. Using Two Micron All Sky Survey photometry, we find that the prominent sub-mm source for KR 120 probably contains an embedded cluster of young stellar objects (YSOs), making it a likely site for triggered star formation. The KR 7 sub-mm source could possibly contain embedded YSOs, while the KR 81 sub-mm source likely does not. The mass column densities for these dominant sub-mm sources fall in the ∼0.1-0.6 g/cm2 range. The mass of the cold, dense material (clumps) seen as the three dominant sub-mm sources falls around ∼100 M☉. We use the SCUBA Legacy catalog to characterize the populations of sub-mm sources around the H II regions, and compare them to the sources found around a previously studied similar ring-like H II region (KR 140) and near a massive star-forming region (W3). Finally, we estimate the IR luminosities of the prominent newly detected sub-mm sources and find that they are correlated with the clump mass, consistent with a previously known luminosity-mass relationship which this study shows to be valid over four orders of magnitude in mass.

Abstract Copyright: ∼

Journal keyword(s): H II regions - ISM: bubbles - ISM: clouds - stars: formation - stars: massive - surveys

CDS comments: In paragraph 4, IRAS 021757+6053 is a misprint for IRAS 02157+6053.

Simbad objects: 46

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Number of rows : 46
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 JCMTSF J012250.4+614951 smm 01 22 50.4 +61 49 51           ~ 2 0
2 LBN 126.70-00.80 HII 01 22 58.059 +61 48 16.67           ~ 89 2
3 JCMTSF J012313.2+614959 smm 01 23 13.2 +61 49 59           ~ 2 0
4 JCMTSF J012313.6+614653 smm 01 23 13.6 +61 46 53           ~ 2 0
5 NAME SH 2-187 NIRS 1 TT* 01 23 17.7 +61 47 35     15.10     ~ 7 0
6 JCMTSF J012318.8+615312 smm 01 23 18.8 +61 53 12           ~ 2 0
7 JCMTSF J012321.2+615454 smm 01 23 21.2 +61 54 54           ~ 2 0
8 JCMTSF J012328.9+615424 smm 01 23 28.9 +61 54 24           ~ 2 0
9 JCMTSF J012329.0+615336 smm 01 23 29.0 +61 53 36           ~ 2 0
10 IRAS 01202+6133 Y*O 01 23 32.17896 +61 48 49.5180           ~ 35 0
11 JCMTSF J012338.5+615201 smm 01 23 38.5 +61 52 01           ~ 2 0
12 JCMTSF J012338.8+614819 smm 01 23 38.8 +61 48 19           ~ 2 0
13 JCMTSF J012342.8+615114 smm 01 23 42.8 +61 51 14           ~ 2 0
14 IRAS 02157+6053 IR 02 19 24.6 +61 07 15           ~ 7 0
15 KMJB 17 smm 02 19 33.3 +61 07 44           ~ 3 0
16 RRF 1343 HII 02 20 05.6 +61 07 04           ~ 38 1
17 KMJB 3 Y*O 02 20 51.384 +61 12 02.64           ~ 11 0
18 IRAS 02171+6058 mul 02 20 51.4 +61 12 01           ~ 11 0
19 KMJB 1 Y*O 02 21 08.52 +61 05 58.2           ~ 7 0
20 IRAS 02174+6052 mul 02 21 08.5 +61 06 00           ~ 8 0
21 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1064 2
22 W 3 MoC 02 27 04.10 +61 52 27.1           ~ 1064 3
23 NAME Heart Nebula HII 02 32.7 +61 27           ~ 336 1
24 IC 1805 OpC 02 32 52.1 +61 28 36           ~ 542 1
25 RAFGL 2591 Y*O 20 29 24.8230 +40 11 19.590           ~ 640 0
26 LS III +50 24 * 21 36 43.3386289056 +50 17 55.645622880 11.52 11.34 11.22     B0:V 13 0
27 JCMTSF J213749.3+502202 smm 21 37 49.3 +50 22 02           ~ 2 0
28 JCMTSF J213749.9+502102 smm 21 37 49.9 +50 21 02           ~ 2 0
29 JCMTSF J213753.1+502308 smm 21 37 53.1 +50 23 08           ~ 2 0
30 JCMTSF J213756.2+502344 smm 21 37 56.2 +50 23 44           ~ 2 0
31 JCMTSF J213759.9+501908 smm 21 37 59.9 +50 19 08           ~ 2 0
32 JCMTSF J213801.8+501956 smm 21 38 01.8 +50 19 56           ~ 2 0
33 JCMTSF J213803.0+501850 smm 21 38 03.0 +50 18 50           ~ 2 0
34 JCMTSF J213813.7+501908 smm 21 38 13.7 +50 19 08           ~ 2 0
35 JCMTSE J213822.5+501908 smm 21 38 22.5 +50 19 08           ~ 2 0
36 IRAS 21366+5005 IR 21 38 23.7 +50 19 12           ~ 2 0
37 LBN 094.79-01.77 HII 21 38 26 +50 23.1           ~ 39 0
38 JCMTSE J213825.8+502714 smm 21 38 25.8 +50 27 14           ~ 2 0
39 JCMTSF J213835.7+502137 smm 21 38 35.7 +50 21 37           ~ 2 0
40 JCMTSF J233912.1+615649 smm 23 39 12.1 +61 56 49           ~ 2 0
41 IRAS 23369+6142 * 23 39 17.4398712432 +61 59 04.543847556           ~ 5 0
42 JCMTSF J233917.8+615914 smm 23 39 17.8 +61 59 14           ~ 2 0
43 JCMTSF J233922.3+615702 smm 23 39 22.3 +61 57 02           ~ 2 0
44 JCMTSF J233923.7+615938 smm 23 39 23.7 +61 59 38           ~ 2 0
45 BD+61 2494 Be* 23 39 47.9091513240 +61 55 41.949789636 9.83 10.41 10.0     B3 27 0
46 LBN 114.55+00.22 HII 23 39.8 +61 56           ~ 38 0

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