bullet dwarf
nounEtymology Blend of Bullet Cluster + dwarf galaxy. From being a situation analogous to the Bullet Cluster of galaxies, except involving a single dwarf galaxy. Where the Bullet Cluster is a galaxy cluster shorn of its dark matter the result of two galaxy clusters colliding and combining, but their dark matter haloes passing through each other and continuing on their way.
› An ultradiffuse galaxy and dwarf galaxy with…
Astronomy, Natural sciences An ultradiffuse dwarf galaxy that resulted from the collisions of two dwarf galaxies, where the stars, gas, and, dust, collide, bind, and shocked together, creating a new single dwarf galaxy and starburst, while the companion dark matter haloes continue onward on their former paths, separating from the now singular galaxy.
Astronomy, Natural sciences Any of a series of ultradiffuse dwarfs lined up on the path of the two dark matter haloes after collision, the remnants of the collision of two, perhaps not dwarf, galaxies, falling behind due to matter shockwave interactions the dark matter did not experience.
- Related terms
- bullet, Bullet Cluster, Bullet Galaxy, Bullet Group, Musketball Cluster, Musket Ball Cluster
- Hypernyms
- dwarf, dwarf galaxy, galaxy, ultradiffuse dwarf, ultradiffuse dwarf galaxy, ultradiffuse galaxy
- Coordinate terms
- dark matter, dark matter halo, low-surface-brightness galaxy, low surface brightness galaxy, LSB, LSB galaxy, tidal dwarf, tidal dwarf galaxy, tidal galaxy