Evidence for the importance of resonance scattering in X-ray emission line profiles of the O star $ζ$ Puppis

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dc.creatorLeutenegger, Maurice A.
dc.creatorOwocki, Stanley P.
dc.creatorKahn, Steven M.
dc.creatorPaerels, Frits B. S.
dc.date2006-10-06
dc.date2007-03-03
dc.date.accessioned2026-07-07T12:46:48Z
dc.date.available2026-07-07T12:46:48Z
dc.descriptionWe fit the Doppler profiles of the He-like triplet complexes of \ion{O}{7} and \ion{N}{6} in the X-ray spectrum of the O star $ζ$ Puppis, using XMM-Newton RGS data collected over $\sim 400$ ks of exposure. We find that they cannot be well fit if the resonance and intercombination lines are constrained to have the same profile shape. However, a significantly better fit is achieved with a model incorporating the effects of resonance scattering, which causes the resonance line to become more symmetric than the intercombination line for a given characteristic continuum optical depth $τ_*$. We discuss the plausibility of this hypothesis, as well as its significance for our understanding of Doppler profiles of X-ray emission lines in O stars.
dc.description29 pages, 8 figures, revised version accepted by ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0610181
dc.identifierhttp://arxiv.org/abs/astro-ph/0610181
dc.identifierAstrophys.J.659:642-649,2007
dc.identifierdoi:10.1086/512031
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/221508
dc.subjectAstrophysics
dc.titleEvidence for the importance of resonance scattering in X-ray emission line profiles of the O star $ζ$ Puppis
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