Analysis of the Dynamical Instability of Several Multiple Stars with Weak Hierarchy

Details Analysis of the Dynamical Instability of Several Multiple Stars with Weak Hierarchy Analysis of the Dynamical Instability of Several Multiple Stars with Weak Hierarchy

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005arep...49..274z&link_type=abstract

Astronomy Reports, vol. 49, Issue 4, p.274-283

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The dynamical stability of 16 multiple stars is analyzed using Monte Carlo simulations with allowance for the errors in the observational data. The analysis was carried out by varying the uncertainties in the initial observational data. Six different stability criteria were considered, and the dynamical evolution was studied using numerical simulations. Eleven of the systems are probably stable, whereas five systems (HD 40887, HD 136176, HD 150680, HD 217675, and HD 222326) are probably unstable (the probability that they are unstable is 0.94 or more accordingt o the results of forward and backward simulations over intervals of 106 yr). The results of the simulations were most consistent with the criteria of Mardling-Aarseth (the correlation coefficient between the probabilities of disruption inferred from the stability criterion and numerical integration was r = 0.998), Valtonen-Karttunen (r = 0.998), and Eggleton-Kiseleva (r = 0.997). In about 92 93% of all cases, these criteria yield results that are consistent with the numerical simulations. These criteria also yield high disruption probabilities for the unstable systems. Scenarios for the formation of such systems are discussed: temporary capture of a field star by a close binary, perturbation of a stable multiple system by a massive field object, and disruption of small stellar groups or clusters. The probabilities that these scenarios are realized are analyzed.

Affiliated with

Also associated with

No associations

Rating

Analysis of the Dynamical Instability of Several Multiple Stars with Weak Hierarchy 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 Analysis of the Dynamical Instability of Several Multiple Stars with Weak Hierarchy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Analysis of the Dynamical Instability of Several Multiple Stars with Weak Hierarchy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1454952