Infall times for Milky Way satellites from their present-day kinematics

@article{Rocha2011InfallTF,
  title={Infall times for Milky Way satellites from their present-day kinematics},
  author={Miguel Rocha and Annika H. G. Peter and James S Bullock},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2011},
  volume={425},
  pages={231-244}
}
We analyze subhalos in the Via Lactea II (VL2) cosmological simulation to look for correlations among their infall times and z = 0 dynamical properties. We find that the presentday orbital energy is tightly correlated with the time at whi ch subhalos last crossed into the virial radius. This energy-infall correlation provides a m eans to infer infall times for Milky Way satellite galaxies. Assuming that the Milky Way’s assem bly can be modeled by VL2, we show that the infall times of some… 

Figures and Tables from this paper

Galactic orbits of selected companions of the Milky Way
High-accuracy absolute proper motions, radial velocities, and distances have now been measured for a number of dwarf-galaxy companions of the Milky Way, making it possible to study their 3D dynamics.
Gaia Proper Motions and Orbits of the Ultra-faint Milky Way Satellites
  • J. Simon
  • Physics
    The Astrophysical Journal
  • 2018
The second data release from the Gaia mission (DR2) provides a comprehensive and unprecedented picture of the motions of astronomical sources in the plane of the sky, extending from the solar
Phat ELVIS: The inevitable effect of the Milky Way’s disc on its dark matter subhaloes
We introduce an extension of the ELVIS project to account for the effects of the Milky Way galaxy on its subhalo population. Our simulation suite, Phat ELVIS, consists of 12 high-resolution
THE SPACE MOTION OF LEO I: THE MASS OF THE MILKY WAY'S DARK MATTER HALO
We combine our Hubble Space Telescope measurement of the proper motion of the Leo I dwarf spheroidal galaxy (presented in a companion paper) with the highest resolution numerical simulations of
The satellites of the Milky Way – insights from semi-analytic modelling in a ΛCDM cosmology
We combine the six high-resolution Aquarius dark matter simulations with a semi-analytic galaxy formation model to investigate the properties of the satellites of Milky Way-like galaxies. We find
Is the vast polar structure of dwarf galaxies a serious problem for Λ cold dark matter
The dwarf galaxies around the Milky Way are distributed in a so-called vast polar structure (VPOS) that may be in conflict with Lambda CDM simulations. Here, we seek to determine if the VPOS poses a
Mass assembly history and infall time of the Fornax dwarf spheroidal galaxy
We use cosmological simulations to identify dark matter subhalo host candidates of the Fornax dwarf spheroidal galaxy using the stellar kinematic properties of Fornax. We consider cold dark matter
The case for strangulation in low-mass hosts: DDO 113
We investigate the case for environmental quenching of the Fornax-mass satellite DDO 113, which lies only 9 kpc in projection from its host, the Large-Magellanic-Cloud-mass galaxy NGC 4214. DDO 113
Satellites of LMC-mass dwarfs: close friendships ruined by Milky Way mass haloes
Motivated by the recent discovery of several dwarfs near the Large Magellanic Cloud (LMC), we study the accretion of massive satellites onto Milky Way (MW)/M31-like haloes using the ELVIS suite of
Proper Motions of Milky Way Ultra-faint Satellites with Gaia DR2 × DES DR1
We present a new, probabilistic method for determining the systemic proper motions of Milky Way (MW) ultra-faint satellites in the Dark Energy Survey (DES). We utilize the superb photometry from the
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 138 REFERENCES
Determining orbits for the Milky Way's dwarfs
We calculate orbits for the Milky Way dwarf galaxies with proper motions, and compare these to subhalo orbits in a high-resolution cosmological simulation. We use the simulation data to assess how
ARE THE MAGELLANIC CLOUDS ON THEIR FIRST PASSAGE ABOUT THE MILKY WAY
Recent proper-motion measurements of the Large and Small Magellanic Clouds (LMC and SMC, respectively) by Kallivayalil and coworkers suggest that the 3D velocities of the Clouds are substantially
Using dwarf satellite proper motions to determine their origin
The highly organised distribution of satellite galaxies su rrounding the Milky Way is a serious challenge to the concordance cosmological model. Perhaps the only remaining solution, in this
The present and future mass of the Milky Way halo
A simple model for the Milky Way halo is presented. It has a flat rotation curve in the inner regions, but the density falls off sharply beyond an outer edge. This truncated, flat rotation curve (TF)
Dynamics of the Magellanic Clouds in a LCDM Universe
We examine Milky Way-Magellanic Cloud systems selected from the Millennium-II Simulation in order to place the orbits of the Magellanic Clouds in a cosmological context. Our analysis shows that
THE STAR FORMATION HISTORY AND EXTENDED STRUCTURE OF THE HERCULES MILKY WAY SATELLITE
We present imaging of the recently discovered Hercules Milky Way satellite and its surrounding regions to study its structure, star formation history and to thoroughly search for signs of disruption.
The Impact of Inhomogeneous Reionization on the Satellite Galaxy Population of the Milky Way
We use the publicly available subhalo catalogs from the via Lactea II simulation along with a Gpc-scale N-body simulation to understand the impact of inhomogeneous reionization on the satellite
Clues to the ‘Magellanic Galaxy’ from cosmological simulations
We use cosmological simulations from the Aquarius Project to study the orbital history of the Large Magellanic Cloud (LMC) and its potential association with other satellites of the Milky Way (MW).
A DEEPER LOOK AT LEO IV: STAR FORMATION HISTORY AND EXTENDED STRUCTURE
We present MMT/Megacam imaging of the Leo IV dwarf galaxy in order to investigate its structure and star formation history, and to search for signs of association with the recently discovered Leo V
Variable Stars in the Newly Discovered Milky Way Satellite in Bootes
We present V, I light curves for 12 variable stars identified in the newly discovered satellite of the Milky Way in the Bootes constellation. Our sample includes 11 RR Lyrae stars (five first
...
1
2
3
4
5
...