Journal article

Correlation between mass segregation and structural concentration in relaxed stellar clusters

Ruggero de Vita, Michele Trenti, Morgan MacLeod

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | OXFORD UNIV PRESS | Published : 2019

Abstract

The level of mass segregation in the core of globular clusters has been previously proposed as a potential indicator of the dynamical constituents of the system, such as presence of a significant population of stellar-mass black holes (BHs), or even a central intermediate-mass black hole (IMBH). However, its measurement is limited to clusters with high-quality Hubble Space Telescope data. Thanks to a set of state-of-the-art direct N-body simulations with up to 200k particles inclusive of stellar evolution, primordial binaries, and varying BH/neutron stars, we highlight for the first time the existence of a clear and tight linear relation between the degree of mass segregation and the cluster..

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University of Melbourne Researchers

Grants

Awarded by NASA - Chandra Xray Center


Awarded by NASA


Funding Acknowledgements

We thank the anonymous referee for constructive and useful suggestions. This work was partially supported by the A.A.H. Pierce Bequest at the University of Melbourne. MM is grateful for support for this work provided by NASA through Einstein Postdoctoral Fellowship grant number PF6-170169 awarded by the Chandra Xray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under contract NAS8-03060. This research made use of Astropy, a community-developed core Python package for Astronomy (Astropy Collaboration et al. 2013). Numerical simulations have been performed on HPC clusters at the University of Melbourne (Spartan) and at the Swinburne University (OzSTAR).