IUE Investigation of Mass Flow in the Interacting Binary U Sagittae
Abstract
Fifteen far-UV and 13 mid-UV high-resolution spectra of the interacting Algol-type binary U Sagittae have been obtained with the IUE satellite. The resonance lines of Si IV and C IV are present in absorption of moderate strength at all phases. At several phases, weak absorption due to the N V resonance lines is present. The high-temperature pseudophotospheric region which is found surrounding the equatorial regions of the primary star in all active Algol-type binaries is present in U Sge, indicating that it is not as dormant as once believed. This is also consistent with recent ground-based studies.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1991
- DOI:
- 10.1086/170427
- Bibcode:
- 1991ApJ...378..281M
- Keywords:
-
- Eclipsing Binary Stars;
- Iue;
- Mass Flow;
- Resonance Lines;
- Ultraviolet Spectra;
- Carbon;
- High Resolution;
- Light Curve;
- Nitrogen;
- Silicon;
- Astrophysics;
- STARS: ECLIPSING BINARIES;
- STARS: INDIVIDUAL CONSTELLATION NAME: U SAGITTAE;
- ULTRAVIOLET: SPECTRA