|
As was mentioned, during galactic collisions, stars can go flying ever which way.. I would assume, depending on velocity and eccentricity of a stars orbit around the core of a large galaxy, I wouldn't say escapees are impossible.. Unlikely perhaps, but not impossible..
The chances of clusters would be significantly lower, as stars flung out by separate galaxies are heading out into a seemingly infinitely large, four dimensional area, their own gravity would only extend so far, and the chances of their individual gravitational influence coming close enough, and being strong enough to bring them together, and slow their velocity down to a point where they would come back at each other and form a cluster, or binary system is very low... Lets also bring into play the fourth dimension. Time.
Two similarly sized stars (S1 and S2) are spat out of two galaxies (G1 and G2) that are 100,000 Ly apart. They are traveling at a ridiculously high velocity of 0.5ly on an intersecting path with each other, but the point of intersection is 20,000 ly from G1, and 84,000 ly from G2 (keep in mind, I know, 20k ly + 85k ly = 105k ly - Space is a 3 dimensional area) The star from G1 is going to reach the point of intersection in 40,000 years. where as the star from G2 will reach that same point in space in 170,000 years, assuming of course that there is no other gravitational input from any other body. There would however be gravitational input on S1 and S2 from their former parent galaxy, their acceleration would slow as a result of this... so the time frames would not be as I mentioned earlier, however their rate of deceleration would be somewhat the same (proportional to the size of the galaxy that they were escaping)
The chances that two stars would be sent out into the void from two galaxies would meet somewhere in between and form a gravitationally bound cluster or binary pair, in my opinion, would be insanely low.. There would be more chance that S1 and S2 would eventually find a new home in another galaxy, as the influence of a body like a galaxy out in the void is a lot stronger than that of a single star hurtling across space..
If we were talking about some mythical super-massive neutron stars, both with a mass like 50x10^2 solar masses, the chances would be higher, but still not significant enough to warrant conversation I don't believe.
|