GALILEAN TYPE IIA BACKGROUNDS AND A MAP

We study nonrelativistic AdS(4) x CP3 solutions with dynamical exponent 3 in type IIA string theory, both with and without Romans mass. The compactifications to four dimensions are found to describe Proca fields in anti-de Sitter spacetime. This leads us to conclude that the massive and massless IIA theories should be identified in four dimensions and the Romans' mass should be identified with the flux along CP3. From supergravity point of view, it suggests a four-dimensional symmetry that rotates Romans mass into the flux along CP3. We also identify M-theory Galilean (ABJM) background which gives rise to the nonrelativistic type IIA solution.