On the Importance of the Interclump Medium for Superionization: O VI Formation in the Wind of Zeta Pup

Details On the Importance of the Interclump Medium for Superionization: O VI Formation in the Wind of Zeta Pup On the Importance of the Interclump Medium for Superionization: O VI Formation in the Wind of Zeta Pup

2008-08-16

arxiv.org/abs/0808.2233v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in ApJL, 4 pages with 3 figures

Scientific paper

10.1086/592568

We have studied superionization and X-ray line formation in the spectra of Zeta Pup using our new stellar atmosphere code (XCMFGEN) that can be used to simultaneously analyze optical, UV, and X-ray observations. Here, we present results on the formation of the O VI ll1032, 1038 doublet. Our simulations, supported by simple theoretical calculations, show that clumped wind models that assume void in the interclump space cannot reproduce the observed O VI profiles. However, enough O VI can be produced if the voids are filled by a low density gas. The recombination of O VI is very efficient in the dense material but in the tenuous interclump region an observable amount of O VI can be maintained. We also find that different UV resonance lines are sensitive to different density regimes in Zeta Pup : C IV is almost exclusively formed within the densest regions, while the majority of O VI resides between clumps. N V is an intermediate case, with contributions from both the tenuous gas and clumps.

Affiliated with

Also associated with

No associations

Rating

On the Importance of the Interclump Medium for Superionization: O VI Formation in the Wind of Zeta Pup does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the Importance of the Interclump Medium for Superionization: O VI Formation in the Wind of Zeta Pup, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Importance of the Interclump Medium for Superionization: O VI Formation in the Wind of Zeta Pup will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-706079