The dynamics of tidal tails from massive satellites

  title={The dynamics of tidal tails from massive satellites},
  author={Jun-Hwan Choi and M. Weinberg and N. Katz},
  journal={Monthly Notices of the Royal Astronomical Society},
We investigate the dynamical mechanisms responsible for producing tidal tails from dwarf satellites using N-body simulations. We describe the essential dynamical mechanisms and morphological consequences of tail production in satellites with masses greater than 0.0001 of the host halo virial mass. We identify two important dynamical co-conspirators: 1) the points where the attractive force of the host halo and satellite are balanced (X-points) do not occur at equal distances from the satellite… Expand
Numerical simulations of tidal tails for the open cluster NGC 188
To aid future observations, we present the results of N-body simulations of tidal tails near the open cluster NGC 188. The simulated tidal tails stretch in both directions along the Galactic orbit ofExpand
Tidal tails of dwarf galaxies on different orbits around the Milky Way
We present a phenomenological description of the properties of tidal tails forming around dwarf galaxies orbiting the Milky Way. For this purpose we use collisionless N-body simulations of dwarfsExpand
The dynamics of satellite disruption in cold dark matter haloes
We investigate the physical mechanisms of tidal heating and satellite disruption in cold dark matter host haloes using N-body simulations based on cosmological initial conditions. We show theExpand
Development of multiple tidal tails around globular clusters and dwarf satellite galaxies
The formation and evolution of tidal tails like those observed around some globular clusters and dwarf satellite galaxies is examined with an N-body simulation. In particular, we analyse in detailExpand
The orientation and kinematics of inner tidal tails around dwarf galaxies orbiting the Milky Way
Using high-resolution collisionless N-body simulations, we study the properties of tidal tails formed in the immediate vicinity of a two-component dwarf galaxy evolving in a static potential of theExpand
We present a new N-body model for the tidal disruption of the Sagittarius (Sgr) dwarf that is capable of simultaneously satisfying the majority of angular position, distance, and radial velocityExpand
Tidal debris morphology and the orbits of satellite galaxies
How do galaxies move relative to one another? While we can examine the motion of dark matter subhalos around their hosts in simulations of structure formation, determining the orbits of satellitesExpand
Kinematics in galactic tidal tails - A source of hypervelocity stars?
Context. Recent observations of stars with unusually high radial velocities in the Galactic stellar halo have raised new interest in so-called hypervelocity stars. Traditionally, it is assumed thatExpand
Revealing the escape mechanism of three-dimensional orbits in a tidally limited star cluster
The aim of this work is to explore the escape process of three-dimensional orbits in a star cluster rotating around its parent galaxy in a circular orbit. The gravitational field of the cluster isExpand
Modelling tidal streams from galactic satellites
Astrophysical simulations are very useful for understanding the physical phenomena of the stellar systems. In this simulation, the computational cost is one of the main concern. To tackle this issue,Expand


The Structural evolution of substructure
We investigate the evolution of substructure in cold dark matter (CDM) halos using N-body simulations of tidal stripping of substructure halos within a static host potential. We find that halosExpand
Dynamical Friction on Satellite Galaxies
For a rigid model satellite, Chandrasekhar's dynamical friction formula describes the orbital evolution quite accurately, when the Coulomb logarithm is chosen appropriately. However, it is not knownExpand
Tidal tails around globular clusters: Are they a good tracer of cluster orbits?
We present the results of detailed N-body simulations of clusters moving in a realistic Milky Way (MW) potential. The strong interaction with the bulge and the disk of the Galaxy leads to theExpand
Building up the stellar halo of the Galaxy
We study numerical simulations of satellite galaxy disruption in a potential resembling that of the Milky Way. Our goal is to assess whether a merger origin for the stellar halo would leaveExpand
The bar-halo interaction-I. From fundamental dynamics to revised N-body requirements
A galaxy remains near equilibrium for most of its history. Only through resonances can nonaxisymmetric features such as spiral arms and bars exert torques over large scales and change the overallExpand
Fossil Signatures of Ancient Accretion Events in the Halo
The role that minor mergers have played in the formation and structure of the Milky Way is still an open question, about which there is much debate. We use numerical simulations to explore theExpand
Tidal debris of dwarf spheroidals as a probe of structure formation models
Recent observations suggest that Carina and other nearby dwarf spheroidal galaxies (dSphs) are surrounded by unbound stars tidally stripped by the Milky Way. We have run high-resolution N-bodyExpand
We present some results of numerical simulations of a globular cluster orbiting in the central region of a triaxial galaxy on a set of "loop" orbits. Tails start forming after about a quarter of theExpand
The Physics of Galaxy Clustering. I. A Model for Subhalo Populations
We present a semianalytic model for cold dark matter halo substructure that can be used as a framework for studying the physics of galaxy formation and as an ingredient in halo models of galaxyExpand
Tidal Streams as Probes of the Galactic Potential
We explore the use of tidal streams from Galactic satellites for recovering the potential of the Milky Way. Our study is motivated both by the discovery of the first lengthy stellar stream in theExpand