2001ApJ...560..806L

Query : 2001ApJ...560..806L

2001ApJ...560..806L - Astrophys. J., 560, 806-820 (2001/October-3)

Observations of the ionized, neutral, and molecular components associated with an expanding H II region.

LEBRON M.E., RODRIGUEZ L.F. and LIZANO S.

Abstract (from CDS):

We present H92α, HI 21 cm, NH3 (1, 1) and NH3 (2, 2) lines and radio continuum observations toward the compact HII region G111.61+0.37, located in the region Sharpless 159. The dense molecular gas (traced by the ammonia lines) in the vicinity of G111.61+0.37 is distributed in clumps indicating considerable inhomogeneity in the molecular gas. A warm (Trot=47 K) ammonia clump is located just in front of the head of the cometary HII region. The photodissociated region associated to this compact HII region was detected in the HI 21 cm line. The neutral region is extended in the direction opposite to the dense molecular gas. The velocity distribution of the neutral gas suggests that the HI region is expanding in a champagne flow resembling that of the HII region, although with much lower velocities.

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Journal keyword(s): ISM: H II Regions - Radio Lines: ISM - Stars: Early-Type - Stars: Formation - ISM: Clouds

Nomenclature: Table 2: [LRL2001] NN (Nos 1-13), [LRL2001] GLLL.ll+B.bb N=3. Table 4: [LRL2001] A (Nos A-D).

Simbad objects: 27

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Number of rows : 27
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 NAME GGD 12-15 OpC 06 10 48.0 -06 13 15           ~ 159 1
2 SH 2-88 B HII 19 46 48.2 +25 12 21           ~ 159 2
3 SH 2-140 OpC 22 19 07.8 +63 17 07           ~ 668 2
4 IRAS 22176+6303 Y*O 22 19 18.23 +63 18 47.5           ~ 600 0
5 GPSR 111.256+0.530 Rad 23 12 18.54 +61 08 02.0           ~ 2 0
6 GPSR 111.260+0.435 Rad 23 12 37.88 +61 02 51.4           ~ 2 0
7 NVSS J231310+611009 Rad 23 13 10.2 +61 10 10           ~ 5 1
8 [WBN74] NGC 7538 IRS 8 IR 23 13 27.3 +61 30 49           ~ 18 0
9 2MASS J23133024+6130103 Y*? 23 13 30.2430274824 +61 30 10.334305152           O9.5V+B0.5V 31 0
10 GPSR 111.527+0.817 Rad 23 13 31.08 +61 30 04.4           ~ 2 0
11 [WBN74] NGC 7538 IRS 4 HII 23 13 32.7 +61 29 04           ~ 24 1
12 TYC 4279-1463-1 * 23 13 34.3977427416 +61 30 14.637855024   12.76 11.66     O3.5V((f*))+O9.5V 31 0
13 TYC 4279-1349-1 * 23 13 36.8131356912 +61 30 39.613105188   14.43 11.57     K 21 2
14 NGC 7538 OpC 23 13 37 +61 30.0           ~ 920 1
15 GB6 B2311+6113 Rad 23 13 37.6 +61 30 23           ~ 3 1
16 [WBN74] NGC 7538 IRS 3 Y*? 23 13 43.646 +61 28 14.02           ~ 67 0
17 [WBN74] NGC 7538 IRS 1 Y*O 23 13 45.318 +61 28 11.69           ~ 433 3
18 [WBN74] NGC 7538 IRS 2 Y*? 23 13 45.4691116296 +61 28 19.985984832           ~ 76 0
19 [LRL2001] 5 Rad 23 13 57.1 +61 08 44           ~ 1 0
20 GPSR 111.439+0.438 Rad 23 13 59.86 +61 06 58.6           ~ 2 0
21 [LRL2001] 7 Rad 23 14 46.0 +61 11 09           ~ 1 0
22 [LRL2001] 8 Rad 23 14 53.8 +61 00 39           ~ 1 0
23 [LRL2001] G111.60+0.39 HII 23 15 23.7 +61 07 58           ~ 2 0
24 SH 2-159 Y*O 23 15 31.2384366062 +61 07 10.181362705           ~ 188 1
25 GPSR 111.660+0.455 Rad 23 15 39.06 +61 12 47.2           ~ 2 0
26 [LRL2001] 13 Rad 23 16 50.3 +61 08 11           ~ 1 0
27 [LRL2001] 12 HII ~ ~           ~ 1 0

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