Hunting white dwarfs at the center of planetary nebulae

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 t...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Ahumada, Javier A., Weidmann, W., Miller Bertolami, Marcelo Miguel, Saker, Leila Yamila
Formato: Articulo
Lenguaje:Español
Publicado: 2019
Materias:
Ciencias Astronómicas
Planetary nebulae nuclei
Planetary nebulae
White dwarf stars
Subdwarf stars
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124794
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124794
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Ciencias Astronómicas
Planetary nebulae nuclei
Planetary nebulae
White dwarf stars
Subdwarf stars
spellingShingle Ciencias Astronómicas
Planetary nebulae nuclei
Planetary nebulae
White dwarf stars
Subdwarf stars
Ahumada, Javier A.
Weidmann, W.
Miller Bertolami, Marcelo Miguel
Saker, Leila Yamila
Hunting white dwarfs at the center of planetary nebulae
topic_facet Ciencias Astronómicas
Planetary nebulae nuclei
Planetary nebulae
White dwarf stars
Subdwarf stars
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.
format Articulo
Articulo
author Ahumada, Javier A.
Weidmann, W.
Miller Bertolami, Marcelo Miguel
Saker, Leila Yamila
author_facet Ahumada, Javier A.
Weidmann, W.
Miller Bertolami, Marcelo Miguel
Saker, Leila Yamila
author_sort Ahumada, Javier A.
title Hunting white dwarfs at the center of planetary nebulae
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
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/124794
work_keys_str_mv AT ahumadajaviera huntingwhitedwarfsatthecenterofplanetarynebulae
AT weidmannw huntingwhitedwarfsatthecenterofplanetarynebulae
AT millerbertolamimarcelomiguel huntingwhitedwarfsatthecenterofplanetarynebulae
AT sakerleilayamila huntingwhitedwarfsatthecenterofplanetarynebulae
bdutipo_str Repositorios
_version_ 1764820451148693504

Ejemplares similares