NSV11749, an elder sibling of the born-again stars V605Aql and V4334Sgr?

We argue that NSV11749, an eruption observed in the early twentieth century, was a rare event known as "very late thermal pulse" (VLTP). To support our argument we compare the light curve of NSV11749 with those of the two bona fide VLTP objects known to date, V4334Sgr and V605Aql, and with...

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Detalles Bibliográficos
Autores principales: Miller Bertolami, Marcelo Miguel, Rohrmann, René, Granada, Anahí, Althaus, Leandro Gabriel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Ciencias Astronómicas
cataclysmic variables
Novae
stars: AGB and post-AGB
stars: individual (NSV 11749
V4334 Sgr
V605 Aql)
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84686
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84686
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
cataclysmic variables
Novae
stars: AGB and post-AGB
stars: individual (NSV 11749
V4334 Sgr
V605 Aql)
spellingShingle Ciencias Astronómicas
cataclysmic variables
Novae
stars: AGB and post-AGB
stars: individual (NSV 11749
V4334 Sgr
V605 Aql)
Miller Bertolami, Marcelo Miguel
Rohrmann, René
Granada, Anahí
Althaus, Leandro Gabriel
NSV11749, an elder sibling of the born-again stars V605Aql and V4334Sgr?
topic_facet Ciencias Astronómicas
cataclysmic variables
Novae
stars: AGB and post-AGB
stars: individual (NSV 11749
V4334 Sgr
V605 Aql)
description We argue that NSV11749, an eruption observed in the early twentieth century, was a rare event known as "very late thermal pulse" (VLTP). To support our argument we compare the light curve of NSV11749 with those of the two bona fide VLTP objects known to date, V4334Sgr and V605Aql, and with those predicted by state-of-the-art stellar evolution models. Next, we explore the INT Photometric H-Alpha Survey (IPHAS) and Two Micron All Sky Survey (2MASS) catalogs for possible counterparts of the eruption. Our analysis shows that the VLTP scenario outperforms all other proposed scenarios as an explanation of NSV11749. We identify an IPHAS/2MASS source at the eruption location of NSV11749. The derived colors suggest that the object is not enshrouded in a thick dust shell as V605Aql and V4334Sgr. Also, the absence of an apparent planetary nebula at the eruption location suggests differences with known VLTP objects which might be linked to the intensity of the eruption and the mass of the object. Further exploration of this source and scenario seems desirable. If NSV11749 was a born-again star, it would be the third event of its kind to have been observed and will strongly help us to increase our understanding of the later stages of stellar evolution and violent reactive convective burning.
format Articulo
Articulo
author Miller Bertolami, Marcelo Miguel
Rohrmann, René
Granada, Anahí
Althaus, Leandro Gabriel
author_facet Miller Bertolami, Marcelo Miguel
Rohrmann, René
Granada, Anahí
Althaus, Leandro Gabriel
author_sort Miller Bertolami, Marcelo Miguel
title NSV11749, an elder sibling of the born-again stars V605Aql and V4334Sgr?
title_short NSV11749, an elder sibling of the born-again stars V605Aql and V4334Sgr?
title_full NSV11749, an elder sibling of the born-again stars V605Aql and V4334Sgr?
title_fullStr NSV11749, an elder sibling of the born-again stars V605Aql and V4334Sgr?
title_full_unstemmed NSV11749, an elder sibling of the born-again stars V605Aql and V4334Sgr?
title_sort nsv11749, an elder sibling of the born-again stars v605aql and v4334sgr?
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84686
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AT rohrmannrene nsv11749aneldersiblingofthebornagainstarsv605aqlandv4334sgr
AT granadaanahi nsv11749aneldersiblingofthebornagainstarsv605aqlandv4334sgr
AT althausleandrogabriel nsv11749aneldersiblingofthebornagainstarsv605aqlandv4334sgr
bdutipo_str Repositorios
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