An X-ray investigation of the NGC 346 field in the small magellanic cloud I. The luminous blue variable HD 5980 and the NGC 346 cluster

We present results from a <i>Chandra</i> observation of the NGC 346 cluster. This cluster contains numerous massive stars and is responsible for the ionization of N66, the most luminous H II region and the largest star formation region in the SMC. In this first paper we will focus on the...

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Autores principales: Nazé, Y., Hartwell, J. M., Stevens, I. R., Corcoran, M. F., Chu, Y. H., Koeniosberger, G., Moffat, A. F. J., Niemelä, Virpi Sinikka
Formato: Articulo
Lenguaje:Inglés
Publicado: 2002
Materias:
Ciencias Astronómicas
Galaxies: star clusters
Magellanic Clouds
X-rays: individual (NGC 346, HD 5980)
X-rays: stars
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84904
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84904
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
Galaxies: star clusters
Magellanic Clouds
X-rays: individual (NGC 346, HD 5980)
X-rays: stars
spellingShingle Ciencias Astronómicas
Galaxies: star clusters
Magellanic Clouds
X-rays: individual (NGC 346, HD 5980)
X-rays: stars
Nazé, Y.
Hartwell, J. M.
Stevens, I. R.
Corcoran, M. F.
Chu, Y. H.
Koeniosberger, G.
Moffat, A. F. J.
Niemelä, Virpi Sinikka
An X-ray investigation of the NGC 346 field in the small magellanic cloud I. The luminous blue variable HD 5980 and the NGC 346 cluster
topic_facet Ciencias Astronómicas
Galaxies: star clusters
Magellanic Clouds
X-rays: individual (NGC 346, HD 5980)
X-rays: stars
description We present results from a <i>Chandra</i> observation of the NGC 346 cluster. This cluster contains numerous massive stars and is responsible for the ionization of N66, the most luminous H II region and the largest star formation region in the SMC. In this first paper we will focus on the characteristics of the main objects of the field. The NGC 346 cluster itself shows only relatively faint X-ray emission (with L<SUP>unabs</SUP><SUB>x</SUB> ∼1.5 × 10<SUP>34</SUP> ergs s<SUP>-1</SUP>, tightly correlated with the core of the cluster. In the field also lies HD 5980, a luminous blue variable star in a binary (or possibly a triple) system that is detected for the first time at X-ray energies. The star is X-ray bright, with an unabsorbed luminosity of L<SUP>unabs</SUP><SUB>x</SUB> ∼ 1.7 × 10<SUP>34</SUP> ergs s<SUP>-1</SUP>, but needs to be monitored further to investigate its X-ray variability over a complete 19 day orbital cycle. The high X-ray luminosity may be associated either with colliding winds in the binary system or with the 1994 eruption. HD 5980 is surrounded by a region of diffuse X-ray emission, which is a supernova remnant. While it may be only a chance alignment with HD 5980, such a spatial coincidence may indicate that the remnant is indeed related to this peculiar massive star.
format Articulo
Articulo
author Nazé, Y.
Hartwell, J. M.
Stevens, I. R.
Corcoran, M. F.
Chu, Y. H.
Koeniosberger, G.
Moffat, A. F. J.
Niemelä, Virpi Sinikka
author_facet Nazé, Y.
Hartwell, J. M.
Stevens, I. R.
Corcoran, M. F.
Chu, Y. H.
Koeniosberger, G.
Moffat, A. F. J.
Niemelä, Virpi Sinikka
author_sort Nazé, Y.
title An X-ray investigation of the NGC 346 field in the small magellanic cloud I. The luminous blue variable HD 5980 and the NGC 346 cluster
title_short An X-ray investigation of the NGC 346 field in the small magellanic cloud I. The luminous blue variable HD 5980 and the NGC 346 cluster
title_full An X-ray investigation of the NGC 346 field in the small magellanic cloud I. The luminous blue variable HD 5980 and the NGC 346 cluster
title_fullStr An X-ray investigation of the NGC 346 field in the small magellanic cloud I. The luminous blue variable HD 5980 and the NGC 346 cluster
title_full_unstemmed An X-ray investigation of the NGC 346 field in the small magellanic cloud I. The luminous blue variable HD 5980 and the NGC 346 cluster
title_sort x-ray investigation of the ngc 346 field in the small magellanic cloud i. the luminous blue variable hd 5980 and the ngc 346 cluster
publishDate 2002
url http://sedici.unlp.edu.ar/handle/10915/84904
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