Hubble Space Telescope NICMOS detection of a partially embedded, intermediate-mass, pre-main-sequence population in the 30 Doradus Nebula

We present the detection of an intermediate-mass, pre-main-sequence population embedded in the nebular filaments surrounding the 30 Doradus region in the Large Magellanic Cloud (LMC) using HST/NICMOS. In addition to four previously known luminous Class I infrared "protostars" the NICMOS da...

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Autores principales: Brandner, Wolfgang, Grebel, Eva, Barbá, Rodolfo Héctor, Walborn, Nolan Revere, Moneti, Andrea
Formato: Articulo
Lenguaje:Inglés
Publicado: 2001
Materias:
Ciencias Astronómicas
stellar content
Galaxias
Magellanic clouds
Estrellas Celestiales
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/2064
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-2064
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
stellar content
Galaxias
Magellanic clouds
Estrellas Celestiales
spellingShingle Ciencias Astronómicas
stellar content
Galaxias
Magellanic clouds
Estrellas Celestiales
Brandner, Wolfgang
Grebel, Eva
Barbá, Rodolfo Héctor
Walborn, Nolan Revere
Moneti, Andrea
Hubble Space Telescope NICMOS detection of a partially embedded, intermediate-mass, pre-main-sequence population in the 30 Doradus Nebula
topic_facet Ciencias Astronómicas
stellar content
Galaxias
Magellanic clouds
Estrellas Celestiales
description We present the detection of an intermediate-mass, pre-main-sequence population embedded in the nebular filaments surrounding the 30 Doradus region in the Large Magellanic Cloud (LMC) using HST/NICMOS. In addition to four previously known luminous Class I infrared "protostars" the NICMOS data reveal 20 new sources with intrinsic infrared excess similar to Galactic pre-main-sequence stars. Based on their infrared brightness, these objects can be identified as the LMC equivalent of Galactic pre-main-sequence stars. The faintest LMC young stellar objects in the sample have colors similar to T Tauri stars and have about the same brightness as T Tauri stars if placed at the distance of the LMC. We find no evidence for a lower mass cutoff in the initial mass function. Instead, the whole spectrum of stellar masses from pre-main-sequence stars with ~1.5 Msolar to massive O stars still embedded in dense knots appears to be present in the nebular filaments. The majority of the young stellar objects can be found to the north of the central starburst cluster R136. This region is very likely evolving into an OB association. The observations provide further evidence that star formation in the 30 Doradus region is very similar to Galactic star formation and confirm the presence of sequential star formation in 30 Doradus, with present-day star formation taking place in the arc of molecular gas to the north and west of the starburst cluster.
format Articulo
Articulo
author Brandner, Wolfgang
Grebel, Eva
Barbá, Rodolfo Héctor
Walborn, Nolan Revere
Moneti, Andrea
author_facet Brandner, Wolfgang
Grebel, Eva
Barbá, Rodolfo Héctor
Walborn, Nolan Revere
Moneti, Andrea
author_sort Brandner, Wolfgang
title Hubble Space Telescope NICMOS detection of a partially embedded, intermediate-mass, pre-main-sequence population in the 30 Doradus Nebula
title_short Hubble Space Telescope NICMOS detection of a partially embedded, intermediate-mass, pre-main-sequence population in the 30 Doradus Nebula
title_full Hubble Space Telescope NICMOS detection of a partially embedded, intermediate-mass, pre-main-sequence population in the 30 Doradus Nebula
title_fullStr Hubble Space Telescope NICMOS detection of a partially embedded, intermediate-mass, pre-main-sequence population in the 30 Doradus Nebula
title_full_unstemmed Hubble Space Telescope NICMOS detection of a partially embedded, intermediate-mass, pre-main-sequence population in the 30 Doradus Nebula
title_sort hubble space telescope nicmos detection of a partially embedded, intermediate-mass, pre-main-sequence population in the 30 doradus nebula
publishDate 2001
url http://sedici.unlp.edu.ar/handle/10915/2064
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