One of the most important systems for understanding chemotactic aggregation is the Keller-Segel system. We consider the time-fractional Keller-Segel system of order ∈ (0, 1). We prove an existence result with small initial data in a class of Besov-Morrey spaces. Self-similar solutions are obtained and we also show an asymptotic behaviour result.
K E Y W O R D SBesov-Morrey, chemotaxis aggregation, fractional derivative, Keller-Segel model, spaces M S C ( 2 0 1 0 ) 26A33, 35A01, 35B40, 35K45, 35K55, 35Q92, 35R11, 92C15, 92C17