Ionized gas, molecules and dust in Sh2-132
We analyse the various interstellar components of the H II region Sh2-132. The main stellar source is the double binary system that includes the Wolf–Rayet star WR 153ab. We use radio continuum images at 408 and 1420 MHz, and H I 21-cm line data taken from the Canadian Galactic Plane Survey, molecul...
| Autores principales: | , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2010
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/99133 https://ri.conicet.gov.ar/11336/6315 http://mnras.oxfordjournals.org/content/405/3/1976 |
| Aporte de: |
| id |
I19-R120-10915-99133 |
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| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Astronomía stars: individual: WR 153ab stars: Wolf–Rayet ISM: molecules ISM: individual objects: Sh2-132 ISM: bubbles H II regions |
| spellingShingle |
Astronomía stars: individual: WR 153ab stars: Wolf–Rayet ISM: molecules ISM: individual objects: Sh2-132 ISM: bubbles H II regions Vasquez, Javier Cappa, Cristina Elisabet Pineault, Serge Duronea, Nicolás Urbano Ionized gas, molecules and dust in Sh2-132 |
| topic_facet |
Astronomía stars: individual: WR 153ab stars: Wolf–Rayet ISM: molecules ISM: individual objects: Sh2-132 ISM: bubbles H II regions |
| description |
We analyse the various interstellar components of the H II region Sh2-132. The main stellar source is the double binary system that includes the Wolf–Rayet star WR 153ab. We use radio continuum images at 408 and 1420 MHz, and H I 21-cm line data taken from the Canadian Galactic Plane Survey, molecular observations of the <sup>12</sup>CO(1–0) line at 115 GHz from the Five College Radio Astronomy Observatory, and available mid- and far-infrared observations obtained with the <i>MSX</i> and <i>IRAS</i> 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 n<sub>e</sub>≃ 20 cm<sup>−3</sup> and M<sub>H II</sub> ≃ 1500 M⊙. 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<sup>−1</sup>, similar to the velocity of the ionized gas.
The emission at 8.3 μm reveals a ring-like feature of about 15 arcmin 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. |
| format |
Articulo Articulo |
| author |
Vasquez, Javier Cappa, Cristina Elisabet Pineault, Serge Duronea, Nicolás Urbano |
| author_facet |
Vasquez, Javier Cappa, Cristina Elisabet Pineault, Serge Duronea, Nicolás Urbano |
| author_sort |
Vasquez, Javier |
| title |
Ionized gas, molecules and dust in Sh2-132 |
| title_short |
Ionized gas, molecules and dust in Sh2-132 |
| title_full |
Ionized gas, molecules and dust in Sh2-132 |
| title_fullStr |
Ionized gas, molecules and dust in Sh2-132 |
| title_full_unstemmed |
Ionized gas, molecules and dust in Sh2-132 |
| title_sort |
ionized gas, molecules and dust in sh2-132 |
| publishDate |
2010 |
| url |
http://sedici.unlp.edu.ar/handle/10915/99133 https://ri.conicet.gov.ar/11336/6315 http://mnras.oxfordjournals.org/content/405/3/1976 |
| work_keys_str_mv |
AT vasquezjavier ionizedgasmoleculesanddustinsh2132 AT cappacristinaelisabet ionizedgasmoleculesanddustinsh2132 AT pineaultserge ionizedgasmoleculesanddustinsh2132 AT duroneanicolasurbano ionizedgasmoleculesanddustinsh2132 |
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Repositorios |
| _version_ |
1764820492935495680 |