I'm working on a stellar generation system that randomly generates stars in as realistic way as possible, and I have an option whereby there's a very small chance that you can get a six-star system. Just by chance I managed to naturally generate one, but it consists of six K V stars with masses between 0.5 and 0.7 sols arranged as follows:
Code: Select all
Orbital Config: (S+C)+N+N+(F+N)
S1: K6 V, 0.6 solar masses, solar metallicity, age: 6.0 Ga (Middle Aged)
S2: K8 V, 0.5 solar masses, solar metallicity, age: 6.0 Ga (Middle Aged), orbital distance 0.1 AU
S3: K4 V, 0.7 solar masses, solar metallicity, age: 6.0 Ga (Middle Aged), orbital distance 10 AU
S4: K8 V, 0.5 solar masses, solar metallicity, age: 6.0 Ga (Middle Aged), orbital distance 150 AU
S5: K5 V, 0.66 solar masses, low metallicity, age: 9.0 Ga (Old), orbital distance 3000 AU
S6: K7 V, 0.55 solar masses, low metallicity, age: 9.0 Ga (Old) , orbital distance 30 AU
What we have here is S1 and S2 in a close binary pair. S3 orbits the S1/S2 pair at a distance of 10 AU, and S4 orbits the pair at 150 AU. Then 3000 AU from the S1/S2 pair is another binary that is older and has lower metallicity (I assume that very far companions can be captured and so aren't required to have the same age and metallicity as the other stars). This Far binary consists of a K7 V star orbiting a K5 V at a distance of 30 AU.
Given the low mass and maturity of this system though, I'm wondering if it's particularly realistic at all though. Would such a system survive like this for 6 billion years? Are sextuple (and quintuple) systems more likely for high mass stars than low mass stars?
And does anyone see any other problems with this system at all?