Skip to main content Accessibility help
×
Home

D/H-Ratio: Observations with ORFEUS II

  • M. Gölz (a1), N. Kappelmann (a1), I. Appenzeller (a2), J. Barnstedt (a1), A. Fromm (a1), M. Grewing (a3), W. Gringel (a1), C. Haas (a1), W. Hopfensitz (a1), G. Krämer (a1), J. Krautter (a2), A. Lindenberger (a1), H. Mandel (a2), K. Werner (a1) and H. Widmann (a1)...

Abstract

During the second flight of the ORFEUS-SPAS satellite (Nov./Dec. 96) high resolution (λ/∆λ = 10,000) Echelle-spectra of BD+28° 4211 in the wavelength regime 912–1400 Å have been taken. Deuterium can be clearly identified in the ORFEUSII Echelle-spectra of this star. For the first time it was possible to take spectra of faint, not redshifted objects in the far ultraviolet with a sufficient spectral resolution to study the deuterium column density in the whole spectral range of the Lyman-series down to the Lyman-limit. We obtained a value of log(ND) = 14.7 (±0.3) towards BD+28° 4211. The hydrogen column density has been determined using ORFEUS Echelle- and IUE-spectra of Ly-α (log(NH) = 19.8 (±0.2)). Thus a value of 8 × 10−6 can be obtained for the D/H-ratio on the line-of-sight towards BD+28° 4211.

    • 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.

      D/H-Ratio: Observations with ORFEUS II
      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.

      D/H-Ratio: Observations with ORFEUS II
      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.

      D/H-Ratio: Observations with ORFEUS II
      Available formats
      ×

Copyright

References

Hide All
Krämer, G. et al. (1990): Observatories in Earth Orbit and Beyond, ed. Kondo, Y.(Kluwer Academic Publishers), 177
McCullough, P.R. (1992): ApJ 390, 213
Napiwotzki, (1993): Acta Astron. 43, 343

D/H-Ratio: Observations with ORFEUS II

  • M. Gölz (a1), N. Kappelmann (a1), I. Appenzeller (a2), J. Barnstedt (a1), A. Fromm (a1), M. Grewing (a3), W. Gringel (a1), C. Haas (a1), W. Hopfensitz (a1), G. Krämer (a1), J. Krautter (a2), A. Lindenberger (a1), H. Mandel (a2), K. Werner (a1) and H. Widmann (a1)...

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.