The symbiotic binary system RX Puppis: a possible recurrent nova with a Mira companion

We present an analysis of photometric and spectroscopic observations of the symbiotic binary system RX Pup with the aim of developing a reliable binary model for the system and identifying mechanisms responsible for its spectacular activity. The binary is composed of a long-period Mira variable surr...

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Detalles Bibliográficos
Autores principales: Mikołajewska, Joana, Brandi, Estela, Hack, Warren, Whitelock, Patricia A., Barbá, Rodolfo Héctor, García, Lía Guillermina, Marang, Freddy
Formato: Articulo
Lenguaje:Inglés
Publicado: 1999
Materias:
Ciencias Astronómicas
Estrellas Celestiales
binaries: symbiotic; circumstellar matter; stars: individual: RX Pup; stars: mass-loss; novae, cataclysmic variables
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/75735
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-75735
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Estrellas Celestiales
binaries: symbiotic; circumstellar matter; stars: individual: RX Pup; stars: mass-loss; novae, cataclysmic variables
spellingShingle Ciencias Astronómicas
Estrellas Celestiales
binaries: symbiotic; circumstellar matter; stars: individual: RX Pup; stars: mass-loss; novae, cataclysmic variables
Mikołajewska, Joana
Brandi, Estela
Hack, Warren
Whitelock, Patricia A.
Barbá, Rodolfo Héctor
García, Lía Guillermina
Marang, Freddy
The symbiotic binary system RX Puppis: a possible recurrent nova with a Mira companion
topic_facet Ciencias Astronómicas
Estrellas Celestiales
binaries: symbiotic; circumstellar matter; stars: individual: RX Pup; stars: mass-loss; novae, cataclysmic variables
description We present an analysis of photometric and spectroscopic observations of the symbiotic binary system RX Pup with the aim of developing a reliable binary model for the system and identifying mechanisms responsible for its spectacular activity. The binary is composed of a long-period Mira variable surrounded by a thick dust shell and a hot ,0:8M( white dwarf companion. The hot component produces practically all activity observed in the UV, optical and radio range, while variable obscuration of the Mira by circumstellar dust is responsible for long-term changes in the near-infrared magnitudes. The observations show that RX Pup underwent a nova-like eruption during the last three decades. The hot component contracted in radius at roughly constant luminosity from 1975 to 1986, and was the source of a strong stellar wind, which prevented it from accreting material lost in the Mira wind. Around 1988/9 the hot component turned over in the Hertzsprung±Russell (HR) diagram and by 1991 its luminosity had faded by a factor of ,30 with respect to the maximum plateau value and the hot wind had practically ceased. By 1995 the nova remnant started to accrete material from the Mira wind, as indicated by a general increase in intensity of the optical continuum and Hi emission. The quiescent spectrum resembles the quiescent spectra of symbiotic recurrent novae, and its intensity indicates that the hot component must accrete as much as ,1 per cent of the Mira wind, which is more or less the amount predicted by Bondi±Hoyle theory. The earliest observational records from the 1890s suggest that another nova-like eruption of RX Pup occurred around 1894.
format Articulo
Articulo
author Mikołajewska, Joana
Brandi, Estela
Hack, Warren
Whitelock, Patricia A.
Barbá, Rodolfo Héctor
García, Lía Guillermina
Marang, Freddy
author_facet Mikołajewska, Joana
Brandi, Estela
Hack, Warren
Whitelock, Patricia A.
Barbá, Rodolfo Héctor
García, Lía Guillermina
Marang, Freddy
author_sort Mikołajewska, Joana
title The symbiotic binary system RX Puppis: a possible recurrent nova with a Mira companion
title_short The symbiotic binary system RX Puppis: a possible recurrent nova with a Mira companion
title_full The symbiotic binary system RX Puppis: a possible recurrent nova with a Mira companion
title_fullStr The symbiotic binary system RX Puppis: a possible recurrent nova with a Mira companion
title_full_unstemmed The symbiotic binary system RX Puppis: a possible recurrent nova with a Mira companion
title_sort symbiotic binary system rx puppis: a possible recurrent nova with a mira companion
publishDate 1999
url http://sedici.unlp.edu.ar/handle/10915/75735
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