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Título del libro: 19th European Workshop On White Dwarfs
Título del capítulo: The Born-again Planetary Nebulae Abell 30 and Abell 78

Autores UNAM:
JESUS ALBERTO TOALA SANZ; SARAH JANE ARTHUR;
Autores externos:

Idioma:

Año de publicación:
2015
Resumen:

The planetary nebulae Abell 30 and Abell 78 are born-again nebulae, which are believed to have undergone a very late thermal pulse, resulting in the ejection of hydrogen-poor material. Born-again PNe are a rare phenomenon, only a few are known. It is really intriguing that in all cases the expansion of the hydrogen-poor ejecta is highly asymmetrical. Here we present new HST observations of the expansion of the ejecta in Abell 30 and Abell 78, and compare them to approximate to 20 yrs older HST images.


Entidades citadas de la UNAM: