Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-01-27
Astrophys.J. 602 (2004) L121-L124
Astronomy and Astrophysics
Astrophysics
Accepted by The Astrophysical Journal Letters, jan 2004
Scientific paper
10.1086/382686
Based on a sample of 45 main-sequence solar-type spectroscopic binaries we find the tidal circularization cutoff in the open cluster NGC 188 (age 7 Gyr) to be well-defined at a period of 15.0 days. When compared to shorter tidal circularization cutoff periods in the younger clusters M67 and the Hyades, this result establishes that tidal circularization processes are effective in solar-type main-sequence binaries for timescales longer than 1 Gyr. This result is in contrast to the theoretical prediction by Zahn & Bouchet that tidal circularization due to equilibrium tides is ineffective for late-type main sequence stars, and that tidal circularization cutoff periods are instead set only by pre-main-sequence tidal circularization. The NGC 188 cutoff period is also longer than can be explained by present theories of tidal circularization due to dynamical tides.
Dolan Christopher J.
Mathieu Robert D.
Meibom Søren
No associations
LandOfFree
The Tidal Circularization Cutoff Period of the Old Open Cluster NGC188 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Tidal Circularization Cutoff Period of the Old Open Cluster NGC188, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Tidal Circularization Cutoff Period of the Old Open Cluster NGC188 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-587741