Molecular gas towards G18.8+1.8
- Autores
- Vasquez, Javier; Rubio, Mónica; Cappa, Cristina Elisabeth; Duronea, Nicolas Urbano
- Año de publicación
- 2012
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Aims. This work aims at investigating the characteristics of the molecular gas associated with the nebula G18.8+1.8, which is linked to the Wolf-Rayet star HD 168206 (WR 113), and its relation to other components of its local interstellar medium. Methods. We carried out molecular observations of the 12CO(J = 1−0) and (J = 2−1) lines with an angular resolution of 44′′ and 22′′ using the SEST telescope. Complementary NANTEN data of the 12CO(1−0) line were also used. The dust emission was analyzed using Spitzer-IRAC images at 8.0 μm, and WISE data at 3.4 μm, 4.6 μm, and 12.0 μm. Results. The SEST data allowed us to identify a molecular component (Cloud 3) that has velocities in the interval from ~+30 to +36 km s-1 and is most probably linked to the nebula. Morphological and kinematical properties suggest that Cloud 3 consists of a wind-blown molecular half-shell, which expands around WR 113. The ratio R2−1/1−0 and excitation temperatures indicate that the molecular gas is being irradiated by strong UV radiation. The location of the inner optical ring in the outer edge of Cloud 3 suggests that the stars SerOB2-1, -2, -3, -63, and -64 are responsables for the ionization of Cloud 3 and the inner ring nebula. A comparison between the spatial distribution of the molecular gas and the PAH emission at 8 μm indicates the existence of a photodissociation region between the ionized and the molecular gas. A search for candidate young stellar objects (YSOs) in the region around G18.8+1.8 based on available 2MASS, MSX, IRAS, and Spitzer-IRAC catalogs resulted in the detection of about sixty sources, some of them projected onto Cloud 3. Two small spots of clustered candidate YSOs are projected near the outer border of Cloud 3, although a triggered stellar formation scenario is doubtful.
Fil: Vasquez, Javier. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Rubio, Mónica. Universidad de Chile; Chile
Fil: Cappa, Cristina Elisabeth. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina
Fil: Duronea, Nicolas Urbano. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina - Materia
-
Interstellar bubbles
G18.8+1.8 (nebulosa)
Wolf rayet stars
WR113 (estrella) - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/16833
Ver los metadatos del registro completo
| id |
CONICETDig_20d795d911bc5de074b6004aaa594616 |
|---|---|
| oai_identifier_str |
oai:ri.conicet.gov.ar:11336/16833 |
| network_acronym_str |
CONICETDig |
| repository_id_str |
3498 |
| network_name_str |
CONICET Digital (CONICET) |
| spelling |
Molecular gas towards G18.8+1.8Vasquez, JavierRubio, MónicaCappa, Cristina ElisabethDuronea, Nicolas UrbanoInterstellar bubblesG18.8+1.8 (nebulosa)Wolf rayet starsWR113 (estrella)https://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Aims. This work aims at investigating the characteristics of the molecular gas associated with the nebula G18.8+1.8, which is linked to the Wolf-Rayet star HD 168206 (WR 113), and its relation to other components of its local interstellar medium. Methods. We carried out molecular observations of the 12CO(J = 1−0) and (J = 2−1) lines with an angular resolution of 44′′ and 22′′ using the SEST telescope. Complementary NANTEN data of the 12CO(1−0) line were also used. The dust emission was analyzed using Spitzer-IRAC images at 8.0 μm, and WISE data at 3.4 μm, 4.6 μm, and 12.0 μm. Results. The SEST data allowed us to identify a molecular component (Cloud 3) that has velocities in the interval from ~+30 to +36 km s-1 and is most probably linked to the nebula. Morphological and kinematical properties suggest that Cloud 3 consists of a wind-blown molecular half-shell, which expands around WR 113. The ratio R2−1/1−0 and excitation temperatures indicate that the molecular gas is being irradiated by strong UV radiation. The location of the inner optical ring in the outer edge of Cloud 3 suggests that the stars SerOB2-1, -2, -3, -63, and -64 are responsables for the ionization of Cloud 3 and the inner ring nebula. A comparison between the spatial distribution of the molecular gas and the PAH emission at 8 μm indicates the existence of a photodissociation region between the ionized and the molecular gas. A search for candidate young stellar objects (YSOs) in the region around G18.8+1.8 based on available 2MASS, MSX, IRAS, and Spitzer-IRAC catalogs resulted in the detection of about sixty sources, some of them projected onto Cloud 3. Two small spots of clustered candidate YSOs are projected near the outer border of Cloud 3, although a triggered stellar formation scenario is doubtful.Fil: Vasquez, Javier. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Rubio, Mónica. Universidad de Chile; ChileFil: Cappa, Cristina Elisabeth. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Duronea, Nicolas Urbano. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; ArgentinaEdp Sciences2012-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/16833Vasquez, Javier; Rubio, Mónica; Cappa, Cristina Elisabeth; Duronea, Nicolas Urbano; Molecular gas towards G18.8+1.8; Edp Sciences; Astronomy And Astrophysics; 545; 4-2012; 89-1010004-6361enginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201219147info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2012/09/aa19147-12/aa19147-12.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:38:05Zoai:ri.conicet.gov.ar:11336/16833instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:38:06.161CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Molecular gas towards G18.8+1.8 |
| title |
Molecular gas towards G18.8+1.8 |
| spellingShingle |
Molecular gas towards G18.8+1.8 Vasquez, Javier Interstellar bubbles G18.8+1.8 (nebulosa) Wolf rayet stars WR113 (estrella) |
| title_short |
Molecular gas towards G18.8+1.8 |
| title_full |
Molecular gas towards G18.8+1.8 |
| title_fullStr |
Molecular gas towards G18.8+1.8 |
| title_full_unstemmed |
Molecular gas towards G18.8+1.8 |
| title_sort |
Molecular gas towards G18.8+1.8 |
| dc.creator.none.fl_str_mv |
Vasquez, Javier Rubio, Mónica Cappa, Cristina Elisabeth Duronea, Nicolas Urbano |
| author |
Vasquez, Javier |
| author_facet |
Vasquez, Javier Rubio, Mónica Cappa, Cristina Elisabeth Duronea, Nicolas Urbano |
| author_role |
author |
| author2 |
Rubio, Mónica Cappa, Cristina Elisabeth Duronea, Nicolas Urbano |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Interstellar bubbles G18.8+1.8 (nebulosa) Wolf rayet stars WR113 (estrella) |
| topic |
Interstellar bubbles G18.8+1.8 (nebulosa) Wolf rayet stars WR113 (estrella) |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
Aims. This work aims at investigating the characteristics of the molecular gas associated with the nebula G18.8+1.8, which is linked to the Wolf-Rayet star HD 168206 (WR 113), and its relation to other components of its local interstellar medium. Methods. We carried out molecular observations of the 12CO(J = 1−0) and (J = 2−1) lines with an angular resolution of 44′′ and 22′′ using the SEST telescope. Complementary NANTEN data of the 12CO(1−0) line were also used. The dust emission was analyzed using Spitzer-IRAC images at 8.0 μm, and WISE data at 3.4 μm, 4.6 μm, and 12.0 μm. Results. The SEST data allowed us to identify a molecular component (Cloud 3) that has velocities in the interval from ~+30 to +36 km s-1 and is most probably linked to the nebula. Morphological and kinematical properties suggest that Cloud 3 consists of a wind-blown molecular half-shell, which expands around WR 113. The ratio R2−1/1−0 and excitation temperatures indicate that the molecular gas is being irradiated by strong UV radiation. The location of the inner optical ring in the outer edge of Cloud 3 suggests that the stars SerOB2-1, -2, -3, -63, and -64 are responsables for the ionization of Cloud 3 and the inner ring nebula. A comparison between the spatial distribution of the molecular gas and the PAH emission at 8 μm indicates the existence of a photodissociation region between the ionized and the molecular gas. A search for candidate young stellar objects (YSOs) in the region around G18.8+1.8 based on available 2MASS, MSX, IRAS, and Spitzer-IRAC catalogs resulted in the detection of about sixty sources, some of them projected onto Cloud 3. Two small spots of clustered candidate YSOs are projected near the outer border of Cloud 3, although a triggered stellar formation scenario is doubtful. Fil: Vasquez, Javier. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Rubio, Mónica. Universidad de Chile; Chile Fil: Cappa, Cristina Elisabeth. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina Fil: Duronea, Nicolas Urbano. Provincia de Buenos Aires. Gobernación. Comision de Invest.científicas. Instituto Argentino de Radioastronomia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - la Plata. Instituto Argentino de Radioastronomia; Argentina |
| description |
Aims. This work aims at investigating the characteristics of the molecular gas associated with the nebula G18.8+1.8, which is linked to the Wolf-Rayet star HD 168206 (WR 113), and its relation to other components of its local interstellar medium. Methods. We carried out molecular observations of the 12CO(J = 1−0) and (J = 2−1) lines with an angular resolution of 44′′ and 22′′ using the SEST telescope. Complementary NANTEN data of the 12CO(1−0) line were also used. The dust emission was analyzed using Spitzer-IRAC images at 8.0 μm, and WISE data at 3.4 μm, 4.6 μm, and 12.0 μm. Results. The SEST data allowed us to identify a molecular component (Cloud 3) that has velocities in the interval from ~+30 to +36 km s-1 and is most probably linked to the nebula. Morphological and kinematical properties suggest that Cloud 3 consists of a wind-blown molecular half-shell, which expands around WR 113. The ratio R2−1/1−0 and excitation temperatures indicate that the molecular gas is being irradiated by strong UV radiation. The location of the inner optical ring in the outer edge of Cloud 3 suggests that the stars SerOB2-1, -2, -3, -63, and -64 are responsables for the ionization of Cloud 3 and the inner ring nebula. A comparison between the spatial distribution of the molecular gas and the PAH emission at 8 μm indicates the existence of a photodissociation region between the ionized and the molecular gas. A search for candidate young stellar objects (YSOs) in the region around G18.8+1.8 based on available 2MASS, MSX, IRAS, and Spitzer-IRAC catalogs resulted in the detection of about sixty sources, some of them projected onto Cloud 3. Two small spots of clustered candidate YSOs are projected near the outer border of Cloud 3, although a triggered stellar formation scenario is doubtful. |
| publishDate |
2012 |
| dc.date.none.fl_str_mv |
2012-04 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/16833 Vasquez, Javier; Rubio, Mónica; Cappa, Cristina Elisabeth; Duronea, Nicolas Urbano; Molecular gas towards G18.8+1.8; Edp Sciences; Astronomy And Astrophysics; 545; 4-2012; 89-101 0004-6361 |
| url |
http://hdl.handle.net/11336/16833 |
| identifier_str_mv |
Vasquez, Javier; Rubio, Mónica; Cappa, Cristina Elisabeth; Duronea, Nicolas Urbano; Molecular gas towards G18.8+1.8; Edp Sciences; Astronomy And Astrophysics; 545; 4-2012; 89-101 0004-6361 |
| dc.language.none.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201219147 info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2012/09/aa19147-12/aa19147-12.html |
| dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
| eu_rights_str_mv |
openAccess |
| rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
| dc.format.none.fl_str_mv |
application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
Edp Sciences |
| publisher.none.fl_str_mv |
Edp Sciences |
| dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
| reponame_str |
CONICET Digital (CONICET) |
| collection |
CONICET Digital (CONICET) |
| instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
| repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
| repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
| _version_ |
1844614402882404352 |
| score |
13.070432 |