The Galactic Mergers and Gravitational Unbound Populations

Abstract

Motivated by the observations on the intra-cluster light (ICL) and inter-galactic stellar populations, n-body simulations are used to model the galactic merging events as a goal to investigate the production and distribution of gravitational unbound populations (GUPs). Both the parabolic and hyperbolic mergers are considered and each category includes six models with different relative orientations between two galaxies. Our results show that there are more (about a factor of two) GUP after a hyperbolic merging event than after a parabolic one. In general, depending on the relative orientation and also the relative velocity of the two galaxies in a merging pair, a head-on collision of a galaxy pair would only make a tiny fraction (less than one percent) of the initial stellar mass become luminous GUP but a considerable fraction (eight to fourteen percent) of the dark matter become dark GUP.

29 pages, 14 figures, published in MNRAS, Online Early

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Cited by in corpus (7)

• The Quantity of Intracluster Light: Comparing Theoretical and Observational Measurement Techniques Using Simulated Clusters
• On the Formation of Elliptical Rings in Disk Galaxies
• The Axis-Symmetric Ring Galaxies: AM 0053-353, AM 0147-350, AM 1133-245, AM 1413-243, AM 2302-322, ARP 318, and Head-On Penetrations
• Galaxies with Supermassive Binary Black Holes: (II) A Model with Cuspy Galactic Density Profiles
• The Intergalactic Stellar Population from Mergers of Elliptical Galaxies with Dark Matter halos
• Studying Dynamical Models of the Core Galaxy NGC 1399 with Merging Remnants
• Galaxies with Supermassive Binary Black Holes: (III) The Roche Lobes and Jiang-Yeh Lobe in a Core System