2010MNRAS.405.1976V

Query : 2010MNRAS.405.1976V

2010MNRAS.405.1976V - Mon. Not. R. Astron. Soc., 405, 1976-1986 (2010/July-1)

Ionized gas, molecules and dust in Sh2-132.

VASQUEZ J., CAPPA C.E., PINEAULT S. and DURONEA N.U.

Abstract (from CDS):

We analyse the various interstellar components of the Hii region Sh2-132. The main stellar source is the double binary system that includes the Wolf-Rayet star WR153ab. We use radio continuum images at 408 and 1420 MHz, and Hi 21-cm line data taken from the Canadian Galactic Plane Survey, molecular observations of the 12CO(1-0) line at 115GHz from the Five College Radio Astronomy Observatory, and available mid- and far-infrared observations obtained with the MSX and IRAS satellites, respectively.

Sh2-132 is composed of two shells showing radio continuum counterparts at both frequencies. The emission is thermal in nature. The estimated rms electron density and ionized mass of the nebula are ne≃ 20/cm3 and. The distribution of the CO emission shows molecular gas bordering the ionized nebula and interacting with it. The velocities of the molecular gas is in the range -38 to -53 km/s, similar to the velocity of the ionized gas.

The emission at 8.3µm reveals a ring-like feature of about 15arcmin that encircles the bright optical regions. This emission is due to the polycyclic aromatic hydrocarbons and marks the location of photodissociation regions.

The gas distribution in the environs of Sh2-132 can be explained in a scenario where the massive stars in the region photodissociated, ionized and swept up the dense molecular material from the parental cloud through their strong stellar winds and intense ultraviolet (UV) photon flux.


Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): stars: individual: WR153ab - stars: Wolf-Rayet - ISM: molecules - ISM: individual objects: Sh2-132 - ISM: bubbles - Hii regions

Nomenclature: Fig. 5, Table 4: [VCP2010] fN (Nos f1-f3), [VCP2010] psN (Nos ps1-ps3). Fig. 7, Table 5: [VCP2010] A (Nos A-F).

Simbad objects: 22

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Number of rows : 22
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME Per Arm PoG 03 30 +45.0           ~ 1513 0
2 SH 2-212 HII 04 40 37.8 +50 27 40           ~ 99 2
3 GRS G308.60 +00.60 HII 13 39.9 -61 45           ~ 101 0
4 RCW 82 HII 13 59.3 -61 27           ~ 30 0
5 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1615 0
6 SH 2-104 HII 20 17 52.5 +36 49 24           ~ 97 0
7 HD 211564 WR* 22 16 24.0318845736 +55 37 36.767570232   11.72 11.61     WN3(h)-w 122 0
8 IRAS 22160+5551 Cld 22 17 51.7 +56 06 02           ~ 6 0
9 HD 211853 WR* 22 18 45.6057566664 +56 07 33.898679364 8.84 9.534 9.236 9.108   WN6o+O6I 276 0
10 BD+55 2722 Y*O 22 18 58.6254723768 +56 07 23.482698528 9.79 10.59 10.15 9.93   O7V(n)z+B 42 0
11 LS III +55 37 * 22 18 59.8740345120 +56 07 18.852642228 10.76 11.0 10.6     O7V 17 0
12 LBN 102.79-00.92 HII 22 19 09.0 +56 04 45           ~ 104 0
13 IRAS 22172+5549 Y*O 22 19 09.14787 +56 05 00.0380           ~ 104 0
14 LS III +55 39 * 22 19 47.9997444648 +56 13 39.930474972 11.71 12.19 11.74     B 11 0
15 LS III +55 40 * 22 19 53.6105216400 +56 09 39.152611872 12.32 12.72 12.08     O9V 14 0
16 LF 4 +55 176 * 22 20 00.9387718392 +56 08 39.862872312 12.47 12.90 12.38     B5 7 0
17 LS III +55 45 * 22 20 21.7733465688 +56 08 52.341006732 10.79 11.1 10.6     O7IV((f)) 14 0
18 NVSS J222034+561438 Rad 22 20 34.27 +56 14 38.2           ~ 1 0
19 IRAS 22187+5559 IR 22 20 34.9 +56 14 39           ~ 15 0
20 LS III +55 49 * 22 20 52.4196454728 +56 08 20.820474024 11.73 12.07 11.50     B0 12 0
21 4C 55.41 Rad 22 21 04.1 +56 10 14           ~ 6 1
22 Ass Cep OB 1 As* 22 29 +56.6           ~ 87 0

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