A QUANTITATIVE EXPLANATION OF THE OBSERVED POPULATION OF MILKY WAY SATELLITE GALAXIES

@article{Koposov2009AQE,
  title={A QUANTITATIVE EXPLANATION OF THE OBSERVED POPULATION OF MILKY WAY SATELLITE GALAXIES},
  author={Sergey E. Koposov and Jaiyul Yoo and H. Rix and D. Weinberg and A. Macci{\`o} and Jordi Miralda-Escud'e Max Planck Institute for Astronomy and Heidelberg and H Germany and I. O. Astronomy and Cambridge and UK. and Sternberg Astronomical Institute and Moscow and Russia. and H. F. Astrophysics and Usa and O. University and Columbus and Institut de Ci'encies del Cosmos and Barcelona and Spain.},
  journal={The Astrophysical Journal},
  year={2009},
  volume={696},
  pages={2179-2194}
}
We revisit the well known discrepancy between the observed number of Milky Way (MW) dwarf satellite companions and the predicted population of cold dark matter (CDM) subhalos, in light of the dozen new low-luminosity satellites found in imaging data from the Sloan Digital Sky Survey (SDSS) and our recent calibration of the SDSS satellite detection efficiency, which implies a total satellite population far larger than these dozen discoveries. We combine a detailed dynamical model for the CDM… Expand
Statistics of Satellite Galaxies around Milky-Way-like Hosts
We calculate the probability that a Milky-Way (MW)-like halo in the standard cosmological model has the observed number of Magellanic Clouds (MCs). The statistics of the number of MCs in the lambdaExpand
Luminosity function and radial distribution of Milky Way satellites in a ΛCDM Universe
We study the luminosity function (LF) and the radial distribution of satellite galaxies within Milky Way (MW) sized haloes as predicted in cold dark matter based models of galaxy formation, makingExpand
ON THE ASSEMBLY OF THE MILKY WAY DWARF SATELLITES AND THEIR COMMON MASS SCALE
We use a particle tagging technique to dynamically populate the N-body Via Lactea II high-resolution simulation with stars. The method is calibrated using the observed luminosity function of MilkyExpand
Probing the epoch of reionization with Milky Way satellites
While the connection between high-redshift star formation and the local Universe has recently been used to understand the observed population of faint dwarf galaxies in the Milky Way (MW) halo, weExpand
Dwarf Cosmology with the StromloMissing Satellites Survey
The standard Lambda Cold Dark Matter model is considered to be a triumph of theoretical astrophysics but observations of the Milky Way and its system of satellite galaxies irresistibly signal thatExpand
The Milky Way’s bright satellites as an apparent failure of ΛCDM
We use the Aquarius simulations to show that the most massive subhaloes in galaxy-mass dark matter (DM) haloes in Λ cold dark matter (ΛCDM) are grossly inconsistent with the dynamics of the brightestExpand
The abundance of satellite galaxies in the inner region of ΛCDM Milky Way sized haloes
The concordance lambda cold dark matter (ΛCDM) cosmology predicts tens of satellite galaxies distributed in the inner region (<40 kpc) of the Milky Way (MW), yet at most 12 were discovered at presentExpand
Dwarf Cosmology with the Stromlo Missing Satellites Survey
The standard Lambda Cold Dark Matter model is considered to be a triumph of theoretical astrophysics but observations of the Milky Way and its system of satellite galaxies irresistibly signal thatExpand
How cold is dark matter? Constraints from Milky Way satellites
We test the luminosity function of Milky Way satellites as a constraint for the nature of dark matter particles. We perform dissipationless high-resolution N-body simulations of the evolution ofExpand
Can cosmological simulations capture the diverse satellite populations of observed Milky Way analogues?
The recent advent of deep observational surveys of local Milky Way `analogues' and their satellite populations allows us to place the Milky Way in a broader cosmological context and to test models ofExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 86 REFERENCES
The Luminosity Function of the Milky Way Satellites
We quantify the detectability of stellar Milky Way satellites in the Sloan Digital Sky Survey (SDSS) Data Release 5. We show that the effective search volumes for the recently discoveredExpand
Hundreds of Milky Way Satellites? Luminosity Bias in the Satellite Luminosity Function
We correct the observed Milky Way satellite luminosity function for luminosity bias using published completeness limits for the Sloan Digital Sky Survey DR5. Assuming that the spatial distribution ofExpand
Redefining the missing satellites problem
Numerical simulations of Milky Way-size cold dark matter (CDM) halos predict a steeply rising mass function of small dark matter subhalos and a substructure count that greatly outnumbers the observedExpand
Central Mass and Luminosity of Milky Way Satellites in the Λ Cold Dark Matter Model
It has been pointed out that the Galactic satellites all have a common mass around 107 M ☉ within 300 pc (M 0.3), while they span almost four orders of magnitude in luminosity. It is argued that thisExpand
A Comprehensive Maximum Likelihood Analysis of the Structural Properties of Faint Milky Way Satellites
We derive the structural parameters of the recently discovered very low luminosity Milky Way satellites through a maximum likelihood algorithm applied to SDSS data. For each satellite, even when onlyExpand
Ultra faint dwarfs: probing early cosmic star formation
We investigate the nature of the newly discovered Ultra Faint dwarf spheroidal galaxies (UF dSphs) in a general cosmological context simultaneously accounting for various 'classical' dSphs and MilkyExpand
Fossil Remnants of Reionization in the Halo of the Milky Way
Our recently completed one billion particle Via Lactea II simulation of a Milky Way-sized dark matter halo resolves over 50,000 gravitationally bound clumps orbiting today within the virializedExpand
A New Milky Way Dwarf Galaxy in Ursa Major
In this Letter, we report the discovery of a new dwarf satellite to the Milky Way, located at (α2000, δ2000) = (15872, 5192) in the constellation of Ursa Major. This object was detected as anExpand
The Tumultuous Lives of Galactic Dwarfs and the Missing Satellites Problem
Hierarchical cold dark matter (CDM) models predict that Milky Way-sized halos contain several hundred dense low-mass dark matter satellites (the substructure), an order of magnitude more than theExpand
Dark Matter Substructure and Gamma-Ray Annihilation in the Milky Way Halo
We present initial results from Via Lactea, the highest resolution simulation to date of Galactic CDM substructure. It follows the formation of a Milky Way-sized halo with Mhalo = 1.8 ? 1012 M? in aExpand
...
1
2
3
4
5
...