A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy
- Autores
- Corti, Mariela Alejandra; Bosch, Guillermo Luis; Niemelä, Virpi Sinikka
- Año de publicación
- 2007
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Context. The presence of a Wolf-Rayet star, WR12, at α = 8 h44m47.2s, δ = -45°58′55. 5″ (J2000.0), triggered the search for a surrounding OB association now known as Bochum 7. Several papers have dealt with the existence of Bo 7, but none actually included spectral types of the stars. To assure the spectral types of members of the association, it is essential to have spectral images of them. Aims. In this paper we present previously unpublished spectra of OB stars over a 30 arcmin field covering the estimated field of the galactic OB association. Methods. From UBV aperture photometry, OB star candidates were selected, and optical spectroscopic observations were obtained for these in CASLEO, Argentina. Results. 63 stars were classified as OB type, including 8 stars already present in the LSS catalogue, and 37 of these 63 stars did not have a well-known spectral type. The OB stars were used to test the properties of the interstellar dust in the line of sight and the relation between the diffuse interestelar band at 4428 A, which grows linearly with E(B-V) until 1 mag. Combining our data with 2MASS IR photometry we tested and confirmed that derivation of stellar parameters from our photometry, using the CHORIZOS code, is highly reliable.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Galaxy: open clusters and associations: individual: Bochum 7
Stars: early-type
Techniques: photometric
Techniques: spectroscopic - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/82975
Ver los metadatos del registro completo
id |
SEDICI_09852af98f3360dc4c324f1ebdb3e27d |
---|---|
oai_identifier_str |
oai:sedici.unlp.edu.ar:10915/82975 |
network_acronym_str |
SEDICI |
repository_id_str |
1329 |
network_name_str |
SEDICI (UNLP) |
spelling |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopyCorti, Mariela AlejandraBosch, Guillermo LuisNiemelä, Virpi SinikkaCiencias AstronómicasGalaxy: open clusters and associations: individual: Bochum 7Stars: early-typeTechniques: photometricTechniques: spectroscopicContext. The presence of a Wolf-Rayet star, WR12, at α = 8 h44m47.2s, δ = -45°58′55. 5″ (J2000.0), triggered the search for a surrounding OB association now known as Bochum 7. Several papers have dealt with the existence of Bo 7, but none actually included spectral types of the stars. To assure the spectral types of members of the association, it is essential to have spectral images of them. Aims. In this paper we present previously unpublished spectra of OB stars over a 30 arcmin field covering the estimated field of the galactic OB association. Methods. From UBV aperture photometry, OB star candidates were selected, and optical spectroscopic observations were obtained for these in CASLEO, Argentina. Results. 63 stars were classified as OB type, including 8 stars already present in the LSS catalogue, and 37 of these 63 stars did not have a well-known spectral type. The OB stars were used to test the properties of the interstellar dust in the line of sight and the relation between the diffuse interestelar band at 4428 A, which grows linearly with E(B-V) until 1 mag. Combining our data with 2MASS IR photometry we tested and confirmed that derivation of stellar parameters from our photometry, using the CHORIZOS code, is highly reliable.Facultad de Ciencias Astronómicas y Geofísicas2007info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf137-143http://sedici.unlp.edu.ar/handle/10915/82975enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20065041info: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:UNLP2025-09-29T11:15:41Zoai:sedici.unlp.edu.ar:10915/82975Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:15:42.174SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy |
title |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy |
spellingShingle |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy Corti, Mariela Alejandra Ciencias Astronómicas Galaxy: open clusters and associations: individual: Bochum 7 Stars: early-type Techniques: photometric Techniques: spectroscopic |
title_short |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy |
title_full |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy |
title_fullStr |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy |
title_full_unstemmed |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy |
title_sort |
A search for OB stars in the field of the galactic OB association Bochum 7 : I. UBV-IR photometry and optical spectroscopy |
dc.creator.none.fl_str_mv |
Corti, Mariela Alejandra Bosch, Guillermo Luis Niemelä, Virpi Sinikka |
author |
Corti, Mariela Alejandra |
author_facet |
Corti, Mariela Alejandra Bosch, Guillermo Luis Niemelä, Virpi Sinikka |
author_role |
author |
author2 |
Bosch, Guillermo Luis Niemelä, Virpi Sinikka |
author2_role |
author author |
dc.subject.none.fl_str_mv |
Ciencias Astronómicas Galaxy: open clusters and associations: individual: Bochum 7 Stars: early-type Techniques: photometric Techniques: spectroscopic |
topic |
Ciencias Astronómicas Galaxy: open clusters and associations: individual: Bochum 7 Stars: early-type Techniques: photometric Techniques: spectroscopic |
dc.description.none.fl_txt_mv |
Context. The presence of a Wolf-Rayet star, WR12, at α = 8 h44m47.2s, δ = -45°58′55. 5″ (J2000.0), triggered the search for a surrounding OB association now known as Bochum 7. Several papers have dealt with the existence of Bo 7, but none actually included spectral types of the stars. To assure the spectral types of members of the association, it is essential to have spectral images of them. Aims. In this paper we present previously unpublished spectra of OB stars over a 30 arcmin field covering the estimated field of the galactic OB association. Methods. From UBV aperture photometry, OB star candidates were selected, and optical spectroscopic observations were obtained for these in CASLEO, Argentina. Results. 63 stars were classified as OB type, including 8 stars already present in the LSS catalogue, and 37 of these 63 stars did not have a well-known spectral type. The OB stars were used to test the properties of the interstellar dust in the line of sight and the relation between the diffuse interestelar band at 4428 A, which grows linearly with E(B-V) until 1 mag. Combining our data with 2MASS IR photometry we tested and confirmed that derivation of stellar parameters from our photometry, using the CHORIZOS code, is highly reliable. Facultad de Ciencias Astronómicas y Geofísicas |
description |
Context. The presence of a Wolf-Rayet star, WR12, at α = 8 h44m47.2s, δ = -45°58′55. 5″ (J2000.0), triggered the search for a surrounding OB association now known as Bochum 7. Several papers have dealt with the existence of Bo 7, but none actually included spectral types of the stars. To assure the spectral types of members of the association, it is essential to have spectral images of them. Aims. In this paper we present previously unpublished spectra of OB stars over a 30 arcmin field covering the estimated field of the galactic OB association. Methods. From UBV aperture photometry, OB star candidates were selected, and optical spectroscopic observations were obtained for these in CASLEO, Argentina. Results. 63 stars were classified as OB type, including 8 stars already present in the LSS catalogue, and 37 of these 63 stars did not have a well-known spectral type. The OB stars were used to test the properties of the interstellar dust in the line of sight and the relation between the diffuse interestelar band at 4428 A, which grows linearly with E(B-V) until 1 mag. Combining our data with 2MASS IR photometry we tested and confirmed that derivation of stellar parameters from our photometry, using the CHORIZOS code, is highly reliable. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo 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://sedici.unlp.edu.ar/handle/10915/82975 |
url |
http://sedici.unlp.edu.ar/handle/10915/82975 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/0004-6361 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20065041 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
dc.format.none.fl_str_mv |
application/pdf 137-143 |
dc.source.none.fl_str_mv |
reponame:SEDICI (UNLP) instname:Universidad Nacional de La Plata instacron:UNLP |
reponame_str |
SEDICI (UNLP) |
collection |
SEDICI (UNLP) |
instname_str |
Universidad Nacional de La Plata |
instacron_str |
UNLP |
institution |
UNLP |
repository.name.fl_str_mv |
SEDICI (UNLP) - Universidad Nacional de La Plata |
repository.mail.fl_str_mv |
alira@sedici.unlp.edu.ar |
_version_ |
1844616029354852352 |
score |
13.070432 |