Occurring between two or more points within a galaxy.
2006, John C. Hodge, “Scalar potential model of redshift and discrete redshift”, in arXiv:
The morphology-radius and the intragalactic medium cluster observations support the movement of matter from Source galaxies to Sink galaxies.
2011, Tilmann Piffl, Mary Williams, Matthias Steinmetz, “Kinematics in galactic tidal tails - A source for Hypervelocity stars?”, in arXiv:
Generally tidal collisions of satellite galaxy produce stars which escape into the intragalactic space even if the satellite itself is on a bound orbit.