http://arxiv.org/abs/1908.07114
In this work, we explore the idea that substructures like stellar clusters could be formed from the tidal stream produced in galactic minor mergers. We use $N$-body and SPH simulations of satellite galaxies interacting with a larger galaxy. We study the distribution of mass in streams to identify overdensity regions in which a substructure could be formed. We found that without gas, no substructure formed as none of the overdensities shows a definite morphology nor dynamical stability. Including gas we found that several clumps appear and proved to be real long standing physical structures ($t \geq$ 1 Gyr). We analyzed the orbits, ages and masses of these structures, finding its correspondence with the halo subsystems. We conclude that it is possible to form cluster-like structures from the material in tidal streams and found evidence in favour of the presence of dark matter in these systems.
D. Noreña, J. Muñoz-Cuartas, L. Quiroga, et. al.
Wed, 21 Aug 19
75/78
Comments: 20 pages, 13 figures. Accepted for publication in Revista Mexicana de Astronom\’ia y Astrof\’isica
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