The puzzle of HD 104994 (WR 46)
- Autores
- Marchenko, Sergey V.; Arias, Julia Inés; Barbá, Rodolfo Héctor; Balona, Luis; Moffat, Anthony F.J.; Niemelä, Virpi Sinikka; Shara, Michael M.; Sterken, Christiaan
- Año de publicación
- 2000
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Intense coordinated spectroscopic and photometric monitoring of the suspected Wolf-Rayet binary WR 46 in 1999 reveals clear periodic variations, P = 0.329 ± 0.013 days, in the radial velocities of the emission lines of highest ionization potential, O VI and N V, found deepest in the Wolf-Rayet wind and thus least likely to be perturbed by a companion. These are accompanied by coherent variability in the profiles of lines with lower ionization/excitation potential and in the continuum flux. Most probably originating from orbital motion of the Wolf-Rayet component of the binary, this periodic radial velocity signal disappears from time to time, thus creating a puzzle yet to be solved. We show that the entangled patterns of the line profile variability are mainly governed by transitions between high and low states of the system's continuum flux.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Stars: individual (WR 46)
Stars: variables: general
Stars: Wolf-Rayet - 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:10915/83568
Ver los metadatos del registro completo
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The puzzle of HD 104994 (WR 46)Marchenko, Sergey V.Arias, Julia InésBarbá, Rodolfo HéctorBalona, LuisMoffat, Anthony F.J.Niemelä, Virpi SinikkaShara, Michael M.Sterken, ChristiaanCiencias AstronómicasStars: individual (WR 46)Stars: variables: generalStars: Wolf-RayetIntense coordinated spectroscopic and photometric monitoring of the suspected Wolf-Rayet binary WR 46 in 1999 reveals clear periodic variations, P = 0.329 ± 0.013 days, in the radial velocities of the emission lines of highest ionization potential, O VI and N V, found deepest in the Wolf-Rayet wind and thus least likely to be perturbed by a companion. These are accompanied by coherent variability in the profiles of lines with lower ionization/excitation potential and in the continuum flux. Most probably originating from orbital motion of the Wolf-Rayet component of the binary, this periodic radial velocity signal disappears from time to time, thus creating a puzzle yet to be solved. We show that the entangled patterns of the line profile variability are mainly governed by transitions between high and low states of the system's continuum flux.Facultad de Ciencias Astronómicas y Geofísicas2000info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf2101-2113http://sedici.unlp.edu.ar/handle/10915/83568enginfo:eu-repo/semantics/altIdentifier/issn/0004-6256info:eu-repo/semantics/altIdentifier/doi/10.1086/301580info: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:UNLP2025-10-15T11:07:47Zoai:sedici.unlp.edu.ar:10915/83568Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:07:47.332SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
The puzzle of HD 104994 (WR 46) |
| title |
The puzzle of HD 104994 (WR 46) |
| spellingShingle |
The puzzle of HD 104994 (WR 46) Marchenko, Sergey V. Ciencias Astronómicas Stars: individual (WR 46) Stars: variables: general Stars: Wolf-Rayet |
| title_short |
The puzzle of HD 104994 (WR 46) |
| title_full |
The puzzle of HD 104994 (WR 46) |
| title_fullStr |
The puzzle of HD 104994 (WR 46) |
| title_full_unstemmed |
The puzzle of HD 104994 (WR 46) |
| title_sort |
The puzzle of HD 104994 (WR 46) |
| dc.creator.none.fl_str_mv |
Marchenko, Sergey V. Arias, Julia Inés Barbá, Rodolfo Héctor Balona, Luis Moffat, Anthony F.J. Niemelä, Virpi Sinikka Shara, Michael M. Sterken, Christiaan |
| author |
Marchenko, Sergey V. |
| author_facet |
Marchenko, Sergey V. Arias, Julia Inés Barbá, Rodolfo Héctor Balona, Luis Moffat, Anthony F.J. Niemelä, Virpi Sinikka Shara, Michael M. Sterken, Christiaan |
| author_role |
author |
| author2 |
Arias, Julia Inés Barbá, Rodolfo Héctor Balona, Luis Moffat, Anthony F.J. Niemelä, Virpi Sinikka Shara, Michael M. Sterken, Christiaan |
| author2_role |
author author author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Astronómicas Stars: individual (WR 46) Stars: variables: general Stars: Wolf-Rayet |
| topic |
Ciencias Astronómicas Stars: individual (WR 46) Stars: variables: general Stars: Wolf-Rayet |
| dc.description.none.fl_txt_mv |
Intense coordinated spectroscopic and photometric monitoring of the suspected Wolf-Rayet binary WR 46 in 1999 reveals clear periodic variations, P = 0.329 ± 0.013 days, in the radial velocities of the emission lines of highest ionization potential, O VI and N V, found deepest in the Wolf-Rayet wind and thus least likely to be perturbed by a companion. These are accompanied by coherent variability in the profiles of lines with lower ionization/excitation potential and in the continuum flux. Most probably originating from orbital motion of the Wolf-Rayet component of the binary, this periodic radial velocity signal disappears from time to time, thus creating a puzzle yet to be solved. We show that the entangled patterns of the line profile variability are mainly governed by transitions between high and low states of the system's continuum flux. Facultad de Ciencias Astronómicas y Geofísicas |
| description |
Intense coordinated spectroscopic and photometric monitoring of the suspected Wolf-Rayet binary WR 46 in 1999 reveals clear periodic variations, P = 0.329 ± 0.013 days, in the radial velocities of the emission lines of highest ionization potential, O VI and N V, found deepest in the Wolf-Rayet wind and thus least likely to be perturbed by a companion. These are accompanied by coherent variability in the profiles of lines with lower ionization/excitation potential and in the continuum flux. Most probably originating from orbital motion of the Wolf-Rayet component of the binary, this periodic radial velocity signal disappears from time to time, thus creating a puzzle yet to be solved. We show that the entangled patterns of the line profile variability are mainly governed by transitions between high and low states of the system's continuum flux. |
| publishDate |
2000 |
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2000 |
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article |
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http://sedici.unlp.edu.ar/handle/10915/83568 |
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eng |
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eng |
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info:eu-repo/semantics/altIdentifier/issn/0004-6256 info:eu-repo/semantics/altIdentifier/doi/10.1086/301580 |
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