Radial gas density profiles in globular clusters: what can milisecond pulsars tell about it?

PEPE, C.; PELLIZZA, L.J.

Tandil

Congreso; 56 Reunión de la Asociación Argentina de Astronomía; 2013

IAFE

Observations in globular clusters (GCs) have failed to detect the amount of intracluster medium (ICM) that stellar evolution theories predict. One possible scenario is that the ICM is being accreted by an intermediate mass black hole (IMBH) at the centre of the GC. In this work we analize the compatibility of radial variations in the gas density profile with the observations of the dispersion measure for the pulsars in the core of NGC 6517 and 47 Tuc (An extra pulsar that lies in the surroundings of the core is considered for 47 Tuc.). We show that in the case of NGC 6517 an IMBH is required from dynamic considerations and that radial variations in the gas density profile are compatible with the actual observations of this cluster.