Ruprecht 55: An OB association at the edge of our Galaxy
- Autores
- Bosch, Guillermo Luis; Barbá, Rodolfo Héctor; Morrell, Nidia Irene; Niemelä, Virpi Sinikka; Ostrov, Pablo Gabriel; Arnal, Edmundo Marcelo; Cappa, Cristina Elisabet; Morras, Ricardo; Giménez de Castro, Guillermo
- Año de publicación
- 2003
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present new spectroscopy in the optical range and 21-cm Hi data covering the Ruprecht 55 (Ru 55) field in the Puppis window where several authors have proposed the existence of one (or two) clusters. We have determined new MK spectral types for about 50 stars in the region, finding 43 OB-type stars among them. LS 985 was found to be an O9 V + 09.5 III binary and it is the earliest type of star in our observed sample. We have identified a stellar OB association (Ru 55), which is most likely related to a depletion detected in our H I data, as: (i) they are located at the same distance (6 kpc), within observational errors; (ii) both have similar radial velocities (∼67 km s-1); (iii) current OB stars could have provided the energy needed to blow the cavity; (iv) the dynamical time-scale for the hole buildup matches the age estimated for the earliest OB stars; and (v) LS 985 might be responsible for ionizing the Hi cavity inner walls close to it.
Facultad de Ciencias Astronómicas y Geofísicas
Instituto Argentino de Radioastronomía - Materia
-
Ciencias Astronómicas
Galaxy: Structure
ISM: Bubbles
ISM: Kinematics and dynamics
Open clusters and associations: Individual: Ruprecht 55
Stars: Early-type - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/84555
Ver los metadatos del registro completo
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Ruprecht 55: An OB association at the edge of our GalaxyBosch, Guillermo LuisBarbá, Rodolfo HéctorMorrell, Nidia IreneNiemelä, Virpi SinikkaOstrov, Pablo GabrielArnal, Edmundo MarceloCappa, Cristina ElisabetMorras, RicardoGiménez de Castro, GuillermoCiencias AstronómicasGalaxy: StructureISM: BubblesISM: Kinematics and dynamicsOpen clusters and associations: Individual: Ruprecht 55Stars: Early-typeWe present new spectroscopy in the optical range and 21-cm Hi data covering the Ruprecht 55 (Ru 55) field in the Puppis window where several authors have proposed the existence of one (or two) clusters. We have determined new MK spectral types for about 50 stars in the region, finding 43 OB-type stars among them. LS 985 was found to be an O9 V + 09.5 III binary and it is the earliest type of star in our observed sample. We have identified a stellar OB association (Ru 55), which is most likely related to a depletion detected in our H I data, as: (i) they are located at the same distance (6 kpc), within observational errors; (ii) both have similar radial velocities (∼67 km s<SUP>-1</SUP>); (iii) current OB stars could have provided the energy needed to blow the cavity; (iv) the dynamical time-scale for the hole buildup matches the age estimated for the earliest OB stars; and (v) LS 985 might be responsible for ionizing the Hi cavity inner walls close to it.Facultad de Ciencias Astronómicas y GeofísicasInstituto Argentino de Radioastronomía2003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf169-178http://sedici.unlp.edu.ar/handle/10915/84555enginfo:eu-repo/semantics/altIdentifier/issn/0035-8711info:eu-repo/semantics/altIdentifier/doi/10.1046/j.1365-8711.2003.06364.xinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:16:15Zoai:sedici.unlp.edu.ar:10915/84555Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:16.119SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Ruprecht 55: An OB association at the edge of our Galaxy |
| title |
Ruprecht 55: An OB association at the edge of our Galaxy |
| spellingShingle |
Ruprecht 55: An OB association at the edge of our Galaxy Bosch, Guillermo Luis Ciencias Astronómicas Galaxy: Structure ISM: Bubbles ISM: Kinematics and dynamics Open clusters and associations: Individual: Ruprecht 55 Stars: Early-type |
| title_short |
Ruprecht 55: An OB association at the edge of our Galaxy |
| title_full |
Ruprecht 55: An OB association at the edge of our Galaxy |
| title_fullStr |
Ruprecht 55: An OB association at the edge of our Galaxy |
| title_full_unstemmed |
Ruprecht 55: An OB association at the edge of our Galaxy |
| title_sort |
Ruprecht 55: An OB association at the edge of our Galaxy |
| dc.creator.none.fl_str_mv |
Bosch, Guillermo Luis Barbá, Rodolfo Héctor Morrell, Nidia Irene Niemelä, Virpi Sinikka Ostrov, Pablo Gabriel Arnal, Edmundo Marcelo Cappa, Cristina Elisabet Morras, Ricardo Giménez de Castro, Guillermo |
| author |
Bosch, Guillermo Luis |
| author_facet |
Bosch, Guillermo Luis Barbá, Rodolfo Héctor Morrell, Nidia Irene Niemelä, Virpi Sinikka Ostrov, Pablo Gabriel Arnal, Edmundo Marcelo Cappa, Cristina Elisabet Morras, Ricardo Giménez de Castro, Guillermo |
| author_role |
author |
| author2 |
Barbá, Rodolfo Héctor Morrell, Nidia Irene Niemelä, Virpi Sinikka Ostrov, Pablo Gabriel Arnal, Edmundo Marcelo Cappa, Cristina Elisabet Morras, Ricardo Giménez de Castro, Guillermo |
| author2_role |
author author author author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Astronómicas Galaxy: Structure ISM: Bubbles ISM: Kinematics and dynamics Open clusters and associations: Individual: Ruprecht 55 Stars: Early-type |
| topic |
Ciencias Astronómicas Galaxy: Structure ISM: Bubbles ISM: Kinematics and dynamics Open clusters and associations: Individual: Ruprecht 55 Stars: Early-type |
| dc.description.none.fl_txt_mv |
We present new spectroscopy in the optical range and 21-cm Hi data covering the Ruprecht 55 (Ru 55) field in the Puppis window where several authors have proposed the existence of one (or two) clusters. We have determined new MK spectral types for about 50 stars in the region, finding 43 OB-type stars among them. LS 985 was found to be an O9 V + 09.5 III binary and it is the earliest type of star in our observed sample. We have identified a stellar OB association (Ru 55), which is most likely related to a depletion detected in our H I data, as: (i) they are located at the same distance (6 kpc), within observational errors; (ii) both have similar radial velocities (∼67 km s<SUP>-1</SUP>); (iii) current OB stars could have provided the energy needed to blow the cavity; (iv) the dynamical time-scale for the hole buildup matches the age estimated for the earliest OB stars; and (v) LS 985 might be responsible for ionizing the Hi cavity inner walls close to it. Facultad de Ciencias Astronómicas y Geofísicas Instituto Argentino de Radioastronomía |
| description |
We present new spectroscopy in the optical range and 21-cm Hi data covering the Ruprecht 55 (Ru 55) field in the Puppis window where several authors have proposed the existence of one (or two) clusters. We have determined new MK spectral types for about 50 stars in the region, finding 43 OB-type stars among them. LS 985 was found to be an O9 V + 09.5 III binary and it is the earliest type of star in our observed sample. We have identified a stellar OB association (Ru 55), which is most likely related to a depletion detected in our H I data, as: (i) they are located at the same distance (6 kpc), within observational errors; (ii) both have similar radial velocities (∼67 km s<SUP>-1</SUP>); (iii) current OB stars could have provided the energy needed to blow the cavity; (iv) the dynamical time-scale for the hole buildup matches the age estimated for the earliest OB stars; and (v) LS 985 might be responsible for ionizing the Hi cavity inner walls close to it. |
| publishDate |
2003 |
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2003 |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/84555 |
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eng |
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eng |
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