Skip to main content Accessibility help
×
Home

The C/N Ratio in WN and WC Stars

  • Linda J. Smith (a1) and Allan J. Willis (a1)

Extract

We present new determinations of the C/He, N/He and C/N ratios in 6 WN and 4 WC stars, resulting from a Sobolev analysis of new IUE UV line measurements in these species. Through improved observations of more stars, the present work extends an earlier, UV-based, study carried out by Willis & Wilson (1978, WW), which gives details of the Escape Probability Modelling (EPM) utilised. Full details of the current IUE observations, measurements and modelling will appear in Monthly Notices: here we summarise the results. Table 1 lists the ten WR stars currently studied — all were observed at low resolution and the brightest eight at high resolution.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      The C/N Ratio in WN and WC Stars
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      The C/N Ratio in WN and WC Stars
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      The C/N Ratio in WN and WC Stars
      Available formats
      ×

Copyright

References

Hide All
Castor, J.I. & Van Blerkom, D., 1970, Astrophys. J. , 161, 485.
Gabriel, M. & Noels, A., 1981, Astron. Astrophys. Lett. , 94, L1.
Noels, A., Conti, P.S., Gabriel, M. & Vreux, J-M., 1980, Astron. Astrophys. , 92, 242.
Nüssbaumer, H., Schmutz, W., Smith, L.J. & Willis, A.J., 1981, Astron. Astrophys. Suppl. , in press.
Smith, L.F. & Kuhi, L.V., 1981, JILA Report No. 117.
Vanbeveren, D. & Doom, C., 1980, Astron. Astrophys. , 87, 77.
Willis, A.J., 1981, Mon. Not. R. astr. Soc. , 198, in press.
Willis, A.J. & Wilson, R., 1978, Mon. Not. R. astr. Soc. , 182, 559.

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed