One possible origin of high velocity stars in the Galaxy is that they are the product of the interaction of binary systems and supermassive black holes. We investigate a new production channel of high velocity stars as due to the close interaction between a star cluster and supermassive black holes in galactic centres. 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 holes. 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 cluster and start orbiting around the galactic centre.

Star clusters and super massive black holes: High velocity stars production / Fragione, G.; Capuzzo Dolcetta, R.. - In: MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA. - ISSN 1824-016X. - 87:4(2016), pp. 687-688. (Intervento presentato al convegno 2016 Cosmic-Lab Conference: Star Clusters as Cosmic Laboratories for Astrophysics, Dynamics and Fundamental Physics, MODEST 2016 tenutosi a Bologna, Italia).

Star clusters and super massive black holes: High velocity stars production

Fragione G.
Primo
;
Capuzzo Dolcetta R.
Secondo
Conceptualization
2016

Abstract

One possible origin of high velocity stars in the Galaxy is that they are the product of the interaction of binary systems and supermassive black holes. We investigate a new production channel of high velocity stars as due to the close interaction between a star cluster and supermassive black holes in galactic centres. 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 holes. 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 cluster and start orbiting around the galactic centre.
2016
2016 Cosmic-Lab Conference: Star Clusters as Cosmic Laboratories for Astrophysics, Dynamics and Fundamental Physics, MODEST 2016
Galaxy: haloes; Galaxy: nuclei; Galaxy: star clusters; Stars: kinematics and dynamics
04 Pubblicazione in atti di convegno::04c Atto di convegno in rivista
Star clusters and super massive black holes: High velocity stars production / Fragione, G.; Capuzzo Dolcetta, R.. - In: MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA. - ISSN 1824-016X. - 87:4(2016), pp. 687-688. (Intervento presentato al convegno 2016 Cosmic-Lab Conference: Star Clusters as Cosmic Laboratories for Astrophysics, Dynamics and Fundamental Physics, MODEST 2016 tenutosi a Bologna, Italia).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1361137
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