Resonance scattering in the X-ray emission lines profiles of ζ Puppis
We present XMM-Newton Reflection Grating Spectrometer observations of pairs of X-ray emission line profiles from the O star ζ Pup that originate from the same He-like ion. The two profiles in each pair have different shapes and cannot both be consistently fit by models assuming the same wind paramet...
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ndltd-Potsdam-oai-kobv.de-opus-ubp-18082013-01-08T00:55:45Z Resonance scattering in the X-ray emission lines profiles of ζ Puppis Leutenegger, M. A. Cohen, D. H. Kahn, S. M. Owocki, S. P. Paerels, F. B. S. Astronomy and allied sciences We present XMM-Newton Reflection Grating Spectrometer observations of pairs of X-ray emission line profiles from the O star ζ Pup that originate from the same He-like ion. The two profiles in each pair have different shapes and cannot both be consistently fit by models assuming the same wind parameters. We show that the differences in profile shape can be accounted for in a model including the effects of resonance scattering, which affects the resonance line in the pair but not the intercombination line. This implies that resonance scattering is also important in single resonance lines, where its effect is difficult to distinguish from a low effective continuum optical depth in the wind. Thus, resonance scattering may help reconcile X-ray line profile shapes with literature mass-loss rates. Universität Potsdam Extern. Extern 2007 InProceedings application/pdf urn:nbn:de:kobv:517-opus-18085 http://opus.kobv.de/ubp/volltexte/2008/1808/ eng http://opus.kobv.de/ubp/doku/urheberrecht.php |
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English |
format |
Others
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Astronomy and allied sciences |
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Astronomy and allied sciences Leutenegger, M. A. Cohen, D. H. Kahn, S. M. Owocki, S. P. Paerels, F. B. S. Resonance scattering in the X-ray emission lines profiles of ζ Puppis |
description |
We present XMM-Newton Reflection Grating Spectrometer observations of pairs of X-ray emission line profiles from the O star ζ Pup that originate from the same He-like ion. The two profiles in each pair have different shapes and cannot both be consistently fit by models assuming the same wind parameters. We show that the differences in profile shape can be accounted for in a model including the effects of resonance scattering, which affects the resonance line in the pair but not the intercombination line. This implies that resonance scattering is also important in single resonance lines, where its effect is difficult to distinguish from a low effective continuum optical depth in the wind. Thus, resonance scattering may help reconcile X-ray line profile shapes with literature mass-loss rates. |
author |
Leutenegger, M. A. Cohen, D. H. Kahn, S. M. Owocki, S. P. Paerels, F. B. S. |
author_facet |
Leutenegger, M. A. Cohen, D. H. Kahn, S. M. Owocki, S. P. Paerels, F. B. S. |
author_sort |
Leutenegger, M. A. |
title |
Resonance scattering in the X-ray emission lines profiles of ζ Puppis |
title_short |
Resonance scattering in the X-ray emission lines profiles of ζ Puppis |
title_full |
Resonance scattering in the X-ray emission lines profiles of ζ Puppis |
title_fullStr |
Resonance scattering in the X-ray emission lines profiles of ζ Puppis |
title_full_unstemmed |
Resonance scattering in the X-ray emission lines profiles of ζ Puppis |
title_sort |
resonance scattering in the x-ray emission lines profiles of ζ puppis |
publisher |
Universität Potsdam |
publishDate |
2007 |
url |
http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-18085 http://opus.kobv.de/ubp/volltexte/2008/1808/ |
work_keys_str_mv |
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_version_ |
1716501629462642688 |