The rotational velocity and barium abundance of Sirius.
Abstract
We have measured the Ba ii 649.69 nm line profile in Sirius using a PEPSIOS interferometer. We find a projected rotational velocity V sin i of 16 + 1 km 1; a heliocentric radial velocity of -8.6 + 0.4km 1; and a log Ba abundance of -8.18 + 0.15 relative to all atoms by number (3.87 if log H = 12), which is greater than the solar abundance by 1.76 + 0.18. Subject headings: stars: abundances stars: individual - stars: rotation
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1977
- DOI:
- 10.1086/155623
- Bibcode:
- 1977ApJ...217..771K
- Keywords:
-
- A Stars;
- Abundance;
- Angular Velocity;
- Barium;
- Stellar Rotation;
- Fourier Transformation;
- Gauss Equation;
- Interferometers;
- Light (Visible Radiation);
- Oao 3;
- Radial Velocity;
- Stellar Spectrophotometry;
- Turbulence;
- Astrophysics