Searching for evidence of interaction between the of star HD 229196 and the interstellar medium

Massive stars with strong stellar winds are expected to have a huge impact on their interstellar surroundings, an effect which, in a surprisingly large number of cases, is not observed. This work is part of a concerted effort to obtain a better and more homogeneous observational data base with which...

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Detalles Bibliográficos
Autores principales: Pineault, Serge, Arnal, Edmundo Marcelo, Cappa, Cristina Elisabet, Cichowolski, Silvina, Normandeau, M., St-Louis, N.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2008
Materias:
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84284
Aporte de:
id I19-R120-10915-84284
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
ISM: bubbles
ISM: structure
Stars: individual: HD 229196
Stars: mass-loss
Stars: winds, outflows
spellingShingle Ciencias Astronómicas
ISM: bubbles
ISM: structure
Stars: individual: HD 229196
Stars: mass-loss
Stars: winds, outflows
Pineault, Serge
Arnal, Edmundo Marcelo
Cappa, Cristina Elisabet
Cichowolski, Silvina
Normandeau, M.
St-Louis, N.
Searching for evidence of interaction between the of star HD 229196 and the interstellar medium
topic_facet Ciencias Astronómicas
ISM: bubbles
ISM: structure
Stars: individual: HD 229196
Stars: mass-loss
Stars: winds, outflows
description Massive stars with strong stellar winds are expected to have a huge impact on their interstellar surroundings, an effect which, in a surprisingly large number of cases, is not observed. This work is part of a concerted effort to obtain a better and more homogeneous observational data base with which to test the predictions of theoretical models. Analysis of the interstellar medium around the Of star HD 229196 shows that it coincides (in projection) with a region of lower radio continuum emission. This suggests that the star has shaped the surrounding interstellar medium via its ionizing flux and stellar wind. However, we find no clear evidence of the star's action in atomic hydrogen images. The radio continuum morphology and absence of a clear expanding H i shell are consistent with the possibility that the star, which is travelling supersonically at ∼30 km s<SUP>-1</SUP> with respect to its local interstellar medium, is creating a weak bow shock. We cannot however rule out the possibility that the observed asymmetry is due to an inhomogeneous interstellar density distribution. We use data from the Canadian Galactic Plane Survey to carry out this study.
format Articulo
Articulo
author Pineault, Serge
Arnal, Edmundo Marcelo
Cappa, Cristina Elisabet
Cichowolski, Silvina
Normandeau, M.
St-Louis, N.
author_facet Pineault, Serge
Arnal, Edmundo Marcelo
Cappa, Cristina Elisabet
Cichowolski, Silvina
Normandeau, M.
St-Louis, N.
author_sort Pineault, Serge
title Searching for evidence of interaction between the of star HD 229196 and the interstellar medium
title_short Searching for evidence of interaction between the of star HD 229196 and the interstellar medium
title_full Searching for evidence of interaction between the of star HD 229196 and the interstellar medium
title_fullStr Searching for evidence of interaction between the of star HD 229196 and the interstellar medium
title_full_unstemmed Searching for evidence of interaction between the of star HD 229196 and the interstellar medium
title_sort searching for evidence of interaction between the of star hd 229196 and the interstellar medium
publishDate 2008
url http://sedici.unlp.edu.ar/handle/10915/84284
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