Metallic Line Binaries
Abstract
A new radial-velocity study of 55 Am stars reveals 16 SB2s, 20 SB1s, and 22 visual or occultation companions for a total of more than one companion per primary. Only about 75% of the primaries are in binaries with periods less than 100 days, even if one allows for unobservable small inclinations and low-mass secondaries. Therefore it may not be true that tidal interactions in close binaries is the only mechanism necessary to produce the low rotational velocities that allow diffusion to act, unless small reductions (factor of 1.4) in rotational velocities occur in binaries of longer periods.
- Publication:
-
Stellar Radial Velocities
- Pub Date:
- 1985
- Bibcode:
- 1985srv..conf..275A
- Keywords:
-
- Am Stars:Radial Velocities;
- Am Stars:Spectroscopic Binaries;
- Radial Velocities:Am Stars;
- Spectroscopic Binaries:Am Stars