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Searching for evidence of interaction between the Of star HD 229196 and the interstellar medium
- Source :
- SEDICI (UNLP), Universidad Nacional de La Plata, instacron:UNLP
- Publication Year :
- 2008
- Publisher :
- Oxford University Press (OUP), 2008.
-
Abstract
- 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-1 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.<br />Facultad de Ciencias Astronómicas y Geofísicas<br />Instituto Argentino de Radioastronomía
- Subjects :
- Ciencias Astronómicas
Stellar mass
ISM: structure
Astrophysics::High Energy Astrophysical Phenomena
Interstellar cloud
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Stellar-wind bubble
Stars: individual: HD 229196
Astrophysics::Solar and Stellar Astrophysics
Stars: mass-loss
winds, outflows [Stars]
Astrophysics::Galaxy Astrophysics
Physics
mass-loss [Stars]
Star formation
Astronomy
Astronomy and Astrophysics
Galactic plane
individual: HD 229196 [Stars]
bubbles [ISM]
Interstellar medium
Stars
Space and Planetary Science
Stars: winds, outflows
structure [ISM]
ISM: bubbles
Heliosphere
Subjects
Details
- ISSN :
- 13652966 and 00358711
- Volume :
- 386
- Database :
- OpenAIRE
- Journal :
- Monthly Notices of the Royal Astronomical Society
- Accession number :
- edsair.doi.dedup.....4786520bc8884a0d38368625751d3c54