Active Luminous Blue Variables in the Large Magellanic Cloud

We present extensive spectroscopic and photometric monitoring of two famous and currently highly active luminous blue variables (LBVs) in the Large Magellanic Cloud (LMC), together with more limited coverage of three further, lesser known members of the class. R127 was discovered as an Ofpe/WN9 star...

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Autores principales:	Walborn, Nolan Revere, Gamen, Roberto Claudio, Morrell, Nidia Irene, Barbá, Rodolfo Héctor, Fernández Lajús, Eduardo Eusebio, Angeloni, Rodolfo
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2017
Materias:	Ciencias Astronómicas Magellanic Clouds stars: early-type stars: massive stars: peculiar stars: variables: S Doradus supergiants
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/87653
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-87653
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 Magellanic Clouds stars: early-type stars: massive stars: peculiar stars: variables: S Doradus supergiants
spellingShingle	Ciencias Astronómicas Magellanic Clouds stars: early-type stars: massive stars: peculiar stars: variables: S Doradus supergiants Walborn, Nolan Revere Gamen, Roberto Claudio Morrell, Nidia Irene Barbá, Rodolfo Héctor Fernández Lajús, Eduardo Eusebio Angeloni, Rodolfo Active Luminous Blue Variables in the Large Magellanic Cloud
topic_facet	Ciencias Astronómicas Magellanic Clouds stars: early-type stars: massive stars: peculiar stars: variables: S Doradus supergiants
description	We present extensive spectroscopic and photometric monitoring of two famous and currently highly active luminous blue variables (LBVs) in the Large Magellanic Cloud (LMC), together with more limited coverage of three further, lesser known members of the class. R127 was discovered as an Ofpe/WN9 star in the 1970s but entered a classical LBV outburst in or about 1980 that is still in progress, thus enlightening us about the minimum state of such objects. R71 is currently the most luminous star in the LMC and continues to provide surprises, such as the appearance of [Ca ii] emission lines, as its spectral type becomes unprecedentedly late. Most recently, R71 has developed inverse P Cyg profiles in many metal lines. The other objects are as follows: HDE 269582, now a "second R127" that has been followed from Ofpe/WN9 to A type in its current outburst; HDE 269216, which changed from late B in 2014 to AF in 2016, its first observed outburst; and R143 in the 30 Doradus outskirts. The light curves and spectroscopic transformations are correlated in remarkable detail and their extreme reproducibility is emphasized, both for a given object and among all of them. It is now believed that some LBVs proceed directly to core collapse. One of these unstable LMC objects may thus oblige in the near future, teaching us even more about the final stages of massive stellar evolution.
format	Articulo Articulo
author	Walborn, Nolan Revere Gamen, Roberto Claudio Morrell, Nidia Irene Barbá, Rodolfo Héctor Fernández Lajús, Eduardo Eusebio Angeloni, Rodolfo
author_facet	Walborn, Nolan Revere Gamen, Roberto Claudio Morrell, Nidia Irene Barbá, Rodolfo Héctor Fernández Lajús, Eduardo Eusebio Angeloni, Rodolfo
author_sort	Walborn, Nolan Revere
title	Active Luminous Blue Variables in the Large Magellanic Cloud
title_short	Active Luminous Blue Variables in the Large Magellanic Cloud
title_full	Active Luminous Blue Variables in the Large Magellanic Cloud
title_fullStr	Active Luminous Blue Variables in the Large Magellanic Cloud
title_full_unstemmed	Active Luminous Blue Variables in the Large Magellanic Cloud
title_sort	active luminous blue variables in the large magellanic cloud
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/87653
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bdutipo_str	Repositorios
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Active Luminous Blue Variables in the Large Magellanic Cloud

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