The OB associations LH 101 and LH 104 in the HII region N158 of the LMC

We present photometric and spectroscopic ob- servations of stars in the Large Magellanic Cloud OB as- sociations LH 101 and LH 104, located in the HII region N158, which we have also imaged. From our observations we have constructed upper H R diagrams for these OB associations, which we nd to consis...

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Detalles Bibliográficos
Autores principales: Testor, G., Niemelä, Virpi Sinikka
Formato: Articulo
Lenguaje:Español
Publicado: 1998
Materias:
Ciencias Astronómicas
Magellanic Clouds
open clusters and associations: individual: LMC-LH 101, LH 104
stars: early type
stars: Wolf-Rayet
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123524
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123524
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
Magellanic Clouds
open clusters and associations: individual: LMC-LH 101, LH 104
stars: early type
stars: Wolf-Rayet
spellingShingle Ciencias Astronómicas
Magellanic Clouds
open clusters and associations: individual: LMC-LH 101, LH 104
stars: early type
stars: Wolf-Rayet
Testor, G.
Niemelä, Virpi Sinikka
The OB associations LH 101 and LH 104 in the HII region N158 of the LMC
topic_facet Ciencias Astronómicas
Magellanic Clouds
open clusters and associations: individual: LMC-LH 101, LH 104
stars: early type
stars: Wolf-Rayet
description We present photometric and spectroscopic ob- servations of stars in the Large Magellanic Cloud OB as- sociations LH 101 and LH 104, located in the HII region N158, which we have also imaged. From our observations we have constructed upper H R diagrams for these OB associations, which we nd to consist mainly of three pop- ulations, one of 2 6 Myr for the stars inside the northern bubble (LH 104), and two populations in the southern HII region (LH 101), one of 2 Myr and the other one aged 3 6 Myr. We have obtained for LH 101 a normal IMF, with a slope of = 1:29 0.20 whereas for LH 104 the IMF is flatter with a slope of = 1:05 0.12. These IMF slopes are consistent with that of other OB associa- tions in the LMC. Our observations reveal in the region of LH 101 the presence of both unevolved and evolved very massive stars, whose ionizing flux is in excess of that derived from our H images of the HII region. The north- west nebulosity in the region of LH 101 thus appears to be matter bound.
format Articulo
Articulo
author Testor, G.
Niemelä, Virpi Sinikka
author_facet Testor, G.
Niemelä, Virpi Sinikka
author_sort Testor, G.
title The OB associations LH 101 and LH 104 in the HII region N158 of the LMC
title_short The OB associations LH 101 and LH 104 in the HII region N158 of the LMC
title_full The OB associations LH 101 and LH 104 in the HII region N158 of the LMC
title_fullStr The OB associations LH 101 and LH 104 in the HII region N158 of the LMC
title_full_unstemmed The OB associations LH 101 and LH 104 in the HII region N158 of the LMC
title_sort ob associations lh 101 and lh 104 in the hii region n158 of the lmc
publishDate 1998
url http://sedici.unlp.edu.ar/handle/10915/123524
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