Analytical Model for the Dynamical Motion of the Bulges of Two Interacting Galaxies

Abstract

Two mathematical models of three bodies of variable masses are used to obtain a qualitative description of two interacting galaxies with mass exchange and mass loss. The reference system is centred on the largest body (the most massive galaxy), and the other two bodies are allowed to move around this one under the laws of gravity. The third body, which simulated the mass lost by the second galaxy in the form of a tail, increases its mass due to the mass lost by the second body and follows its trajectory. We are interested in knowing the time evolution of the separation of the two bulges of the interacting galaxies, and the parameters for the analytical models are obtained by running simulations with the GADGET-2 N-body code. The resulting behavior of this distance in our mathematical models is qualitatively in good agreement with that obtained by this code.

Anti-myeloma activity and molecular logic operation by Natural Killer cells in microfluidic droplets

“…This makes the platform suitable for investigating both stable and transient interactions between various types of immune cells and target cells as well as relevant biological events including multiple target killing [24,32]. Serial killer NK cells have the ability to kill 4 or more targets within 16 hrs [30,33,34]. Onfelt and colleagues reported that 20% of the NK cell population are serial killers, forming 4-8 conjugates over a 12 hour time period [12].…”