# Robust associations of massive baryonic objects

In astronomy, a RAMBO or robust association of massive baryonic objects is a dark cluster made of brown dwarfs or white dwarfs.

## Introduction

RAMBOs were proposed by Moore and Silk in 1995. They may have an effective radius between 1 and 15 pc, with masses in the range 10–100,000 ${\displaystyle M_{\odot }}$ (solar masses).[1]

## Dynamics

The dynamics of these objects, if they do exist, must be quite different from that of standard star clusters. With a very narrow mass range (all brown dwarfs or white dwarfs), the evaporation rate of these RAMBOs should be very slow as predicted by the evolution of simulated mono-component cluster models.[2] Theoretically, these very long-lived objects could exist in large numbers. The presence of a clustered thick disk-like component of dark matter in the Galaxy has been suggested by Sanchez-Salcedo (1997, 1999) and Kerins (1997).[3][4][5]