High-velocity stars are usually thought to be the dynamical product of the interaction of binary systems with supermassive black holes. In this paper, we investigate a particular mechanism of production of high-velocity stars as due to the close interaction between a massive and orbitally decayed globular cluster and a supermassive black hole binary. The high velocity acquired by some stars of the cluster comes from combined effect of extraction of their gravitational binding energy and from the slingshot due to the interaction with the black hole binary. After the close interaction, stars could reach a velocity sufficient to travel in the halo and even overcome the galactic potential well, while some of them are just stripped from the globular cluster and start orbiting around the galactic centre.

High-velocity stars from the interaction of a globular cluster and a massive black hole binary / Fragione, Giacomo; CAPUZZO DOLCETTA, Roberto Angelo. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - STAMPA. - 458:3(2016), pp. 2596-2603. [10.1093/mnras/stw531]

High-velocity stars from the interaction of a globular cluster and a massive black hole binary

FRAGIONE, GIACOMO;CAPUZZO DOLCETTA, Roberto Angelo
2016

Abstract

High-velocity stars are usually thought to be the dynamical product of the interaction of binary systems with supermassive black holes. In this paper, we investigate a particular mechanism of production of high-velocity stars as due to the close interaction between a massive and orbitally decayed globular cluster and a supermassive black hole binary. The high velocity acquired by some stars of the cluster comes from combined effect of extraction of their gravitational binding energy and from the slingshot due to the interaction with the black hole binary. After the close interaction, stars could reach a velocity sufficient to travel in the halo and even overcome the galactic potential well, while some of them are just stripped from the globular cluster and start orbiting around the galactic centre.
2016
Astrophysics; Galaxies; High Velocity Stars; Black Holes
01 Pubblicazione su rivista::01a Articolo in rivista
High-velocity stars from the interaction of a globular cluster and a massive black hole binary / Fragione, Giacomo; CAPUZZO DOLCETTA, Roberto Angelo. - In: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. - ISSN 0035-8711. - STAMPA. - 458:3(2016), pp. 2596-2603. [10.1093/mnras/stw531]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/867247
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