Incorporating Streams into Milky Way Models
arXiv:1401.4070 · doi:10.1093/mnras/stu132
Abstract
We develop a framework for modelling the Milky Way using stellar streams and a wide range of photometric and kinematic observations. Through the use of mock data we demonstrate that a standard suite of Galactic observations leads to degeneracies in the inferred halo parameters. We then incorporate a GD-1-like stream into this suite using the orbit-fitting technique and show that the streams reduces the uncertainties in these parameters provided all observations are fit simultaneously. We also explore how the assumption of a disk-halo alignment can lead unphysical models. Our results may explain why some studies based on the Sagittarius stream find that the halo's intermediate axis is parallel to the disk spin axis even though such a configuration is highly unstable. Finally we show that both longer streams and multiple streams lead to improvements in our ability to infer the shape of our dark halo.
accepted to MNRAS
References in corpus (7)
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Cited by in corpus (19)
- Globular Cluster Streams as Galactic High-Precision Scales - The Poster Child Palomar 5
- And yet it moves: The dangers of artificially fixing the Milky Way center of mass in the presence of a massive Large Magellanic Cloud
- The mass of our Milky Way
- Estimating the dark matter halo mass of our Milky Way using dynamical tracers
- Milky Way Mass and Potential Recovery Using Tidal Streams in a Realistic Halo
- Dipping Our Toes in the Water: First Models of GD-1 as a Stream
- Serendipitous Discovery of a Thin Stellar Stream near the Galactic Bulge in the Pan-STARRS1 3Pi Survey
- Inferring the gravitational potential of the Milky Way with a few precisely measured stars
- Internal Alignments of Red Versus Blue Discs in Dark Matter Halos
- Two New Halo Debris Streams in the Sloan Digital Sky Survey
- What to expect from dynamical modelling of galactic haloes II: the spherical Jeans equation
- Systematic uncertainties from halo asphericity in dark matter searches
- What to expect from dynamical modelling of galactic haloes
- Predictions for the detection of Tidal Streams with Gaia using Great Circle Methods
- Effects of chaos on the detectability of stellar streams
- Is the vast polar structure of dwarf galaxies a serious problem for lambda cold dark matter?
- Uniform Modelling of the Stellar Density of Thirteen Tidal Streams within the Galactic Halo
- Tidal Debris as a Dark Matter Probe
- Galactoseismology in the GAIA Era