HDE 269896: una supergigante especial de la nube mayor de Magallanes

The star HDE 269896, a hypergiant in the Large Magellanic Cloud, with spectral type ON9.7 Ia+, is a special case within the known OB Zoo. We have discovered strong emission from the N II 5000 ˚A complex in its spectrum, and the previously known He II λ4686 emission, with an anomalous strength for th...

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Detalles Bibliográficos
Autores principales: Corti, Mariela Alejandra, Walborn, Nolan Revere
Formato: Articulo
Lenguaje:Español
Publicado: 2008
Materias:
Ciencias Astronómicas
HDE 269896 (estrella)
Large Magellanic Cloud
Hypergiant stars
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/102835
https://ri.conicet.gov.ar/11336/22919
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-102835
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
HDE 269896 (estrella)
Large Magellanic Cloud
Hypergiant stars
spellingShingle Ciencias Astronómicas
HDE 269896 (estrella)
Large Magellanic Cloud
Hypergiant stars
Corti, Mariela Alejandra
Walborn, Nolan Revere
HDE 269896: una supergigante especial de la nube mayor de Magallanes
topic_facet Ciencias Astronómicas
HDE 269896 (estrella)
Large Magellanic Cloud
Hypergiant stars
description The star HDE 269896, a hypergiant in the Large Magellanic Cloud, with spectral type ON9.7 Ia+, is a special case within the known OB Zoo. We have discovered strong emission from the N II 5000 ˚A complex in its spectrum, and the previously known He II λ4686 emission, with an anomalous strength for the spectral type, has also been observed. Comparing HDE 269896 with other objects that show N II emission lines, such as WN10 and WN11 types, we find that this star is highly evolved, albeit less so than the latter stars. Thus, it is reasonable to propose that HDE 269896 should be in an immediate pre-WNVL (Very Late WN) state. Another characteristic of this star is the unusually wide range of ionization present in its extended atmosphere. Subsequent analysis of its spectrum will permit a better understanding of both the relevant atomic physics and the structure of this unusual atmosphere.
format Articulo
Articulo
author Corti, Mariela Alejandra
Walborn, Nolan Revere
author_facet Corti, Mariela Alejandra
Walborn, Nolan Revere
author_sort Corti, Mariela Alejandra
title HDE 269896: una supergigante especial de la nube mayor de Magallanes
title_short HDE 269896: una supergigante especial de la nube mayor de Magallanes
title_full HDE 269896: una supergigante especial de la nube mayor de Magallanes
title_fullStr HDE 269896: una supergigante especial de la nube mayor de Magallanes
title_full_unstemmed HDE 269896: una supergigante especial de la nube mayor de Magallanes
title_sort hde 269896: una supergigante especial de la nube mayor de magallanes
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/102835
https://ri.conicet.gov.ar/11336/22919
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