Hunting white dwarfs at the center of planetary nebulae
- Autores
- Ahumada, Javier A.; Weidmann, W.; Miller Bertolami, Marcelo Miguel; Saker, Leila Yamila
- Año de publicación
- 2019
- Idioma
- español castellano
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We present Gemini-South observations of nine faint and extended planetary nebulae (PNe). Using direct images taken with the spectrograph Gemini-South multi-object spectrograph (GMOS), we built the (u g ¢- ¢) versus (g r ¢- ¢) diagrams of the stars in the observed areas which allowed us to consider their geometrical positions and identify the probable central stars of the nebulae. Our stellar spectra of seven stars, also taken with GMOS, indicate that four (and probably two more) objects are white dwarfs of the DAO subtype. Moreover, the white dwarf status of the four stars is confirmed by the parameters Teff and log g derived with the help of theoretical stellar spectra. Given this evidence, we propose that these hot stars are the central ionizing sources of the nebulae. With this work we hope to help improve the current scarce statistics on central white dwarfs in PNe.
Facultad de Ciencias Astronómicas y Geofísicas - Materia
-
Ciencias Astronómicas
Planetary nebulae nuclei
Planetary nebulae
White dwarf stars
Subdwarf stars - 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:10915/124794
Ver los metadatos del registro completo
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Hunting white dwarfs at the center of planetary nebulaeAhumada, Javier A.Weidmann, W.Miller Bertolami, Marcelo MiguelSaker, Leila YamilaCiencias AstronómicasPlanetary nebulae nucleiPlanetary nebulaeWhite dwarf starsSubdwarf starsWe present Gemini-South observations of nine faint and extended planetary nebulae (PNe). Using direct images taken with the spectrograph Gemini-South multi-object spectrograph (GMOS), we built the (u g ¢- ¢) versus (g r ¢- ¢) diagrams of the stars in the observed areas which allowed us to consider their geometrical positions and identify the probable central stars of the nebulae. Our stellar spectra of seven stars, also taken with GMOS, indicate that four (and probably two more) objects are white dwarfs of the DAO subtype. Moreover, the white dwarf status of the four stars is confirmed by the parameters Teff and log g derived with the help of theoretical stellar spectra. Given this evidence, we propose that these hot stars are the central ionizing sources of the nebulae. With this work we hope to help improve the current scarce statistics on central white dwarfs in PNe.Facultad de Ciencias Astronómicas y Geofísicas2019-09-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/124794spainfo:eu-repo/semantics/altIdentifier/issn/1538-4357info:eu-repo/semantics/altIdentifier/issn/0004-637xinfo:eu-repo/semantics/altIdentifier/arxiv/1909.13364info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4357/ab3797info: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:UNLP2025-09-29T11:29:48Zoai:sedici.unlp.edu.ar:10915/124794Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:29:48.603SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Hunting white dwarfs at the center of planetary nebulae |
| title |
Hunting white dwarfs at the center of planetary nebulae |
| spellingShingle |
Hunting white dwarfs at the center of planetary nebulae Ahumada, Javier A. Ciencias Astronómicas Planetary nebulae nuclei Planetary nebulae White dwarf stars Subdwarf stars |
| title_short |
Hunting white dwarfs at the center of planetary nebulae |
| title_full |
Hunting white dwarfs at the center of planetary nebulae |
| title_fullStr |
Hunting white dwarfs at the center of planetary nebulae |
| title_full_unstemmed |
Hunting white dwarfs at the center of planetary nebulae |
| title_sort |
Hunting white dwarfs at the center of planetary nebulae |
| dc.creator.none.fl_str_mv |
Ahumada, Javier A. Weidmann, W. Miller Bertolami, Marcelo Miguel Saker, Leila Yamila |
| author |
Ahumada, Javier A. |
| author_facet |
Ahumada, Javier A. Weidmann, W. Miller Bertolami, Marcelo Miguel Saker, Leila Yamila |
| author_role |
author |
| author2 |
Weidmann, W. Miller Bertolami, Marcelo Miguel Saker, Leila Yamila |
| author2_role |
author author author |
| dc.subject.none.fl_str_mv |
Ciencias Astronómicas Planetary nebulae nuclei Planetary nebulae White dwarf stars Subdwarf stars |
| topic |
Ciencias Astronómicas Planetary nebulae nuclei Planetary nebulae White dwarf stars Subdwarf stars |
| dc.description.none.fl_txt_mv |
We present Gemini-South observations of nine faint and extended planetary nebulae (PNe). Using direct images taken with the spectrograph Gemini-South multi-object spectrograph (GMOS), we built the (u g ¢- ¢) versus (g r ¢- ¢) diagrams of the stars in the observed areas which allowed us to consider their geometrical positions and identify the probable central stars of the nebulae. Our stellar spectra of seven stars, also taken with GMOS, indicate that four (and probably two more) objects are white dwarfs of the DAO subtype. Moreover, the white dwarf status of the four stars is confirmed by the parameters Teff and log g derived with the help of theoretical stellar spectra. Given this evidence, we propose that these hot stars are the central ionizing sources of the nebulae. With this work we hope to help improve the current scarce statistics on central white dwarfs in PNe. Facultad de Ciencias Astronómicas y Geofísicas |
| description |
We present Gemini-South observations of nine faint and extended planetary nebulae (PNe). Using direct images taken with the spectrograph Gemini-South multi-object spectrograph (GMOS), we built the (u g ¢- ¢) versus (g r ¢- ¢) diagrams of the stars in the observed areas which allowed us to consider their geometrical positions and identify the probable central stars of the nebulae. Our stellar spectra of seven stars, also taken with GMOS, indicate that four (and probably two more) objects are white dwarfs of the DAO subtype. Moreover, the white dwarf status of the four stars is confirmed by the parameters Teff and log g derived with the help of theoretical stellar spectra. Given this evidence, we propose that these hot stars are the central ionizing sources of the nebulae. With this work we hope to help improve the current scarce statistics on central white dwarfs in PNe. |
| publishDate |
2019 |
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2019-09-16 |
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