Probabilistic model for constraining the Galactic potential using tidal streams

Abstract

We present a generative probabilistic model for a tidal stream and demonstrate how this model is used to constrain the Galactic potential. The model takes advantage of the simple structure of a stream in angle and frequency space for the correct potential. We investigate how the method performs on full 6D mock stream data, and mock data with outliers included. As currently formulated the technique is computationally costly when applied to data with large observational errors, but we describe several modifications that promise to make the technique computationally tractable.

9 pages, 11 figures, updated to version accepted for publication in MNRAS

References in corpus (6)

• On the local dark matter density
• A new determination of the local dark matter density from the kinematics of K dwarfs
• The mechanics of tidal streams
• Disassembling the Galaxy with angle-action coordinates
• Fitting orbits to tidal streams
• Fitting orbits to tidal streams with proper motions

Cited by in corpus (35)

• Stellar Streams Discovered in the Dark Energy Survey
• "Skinny Milky Way, Please", says Sagittarius
• Globular Cluster Streams as Galactic High-Precision Scales - The Poster Child Palomar 5
• Adaptive Multidimensional Integration: VEGAS Enhanced
• The shape of the inner Milky Way halo from observations of the Pal 5 and GD-1 stellar streams
• The number and size of subhalo-induced gaps in stellar streams
• The mass of our Milky Way
• Linear perturbation theory for tidal streams and the small-scale CDM power spectrum
• Dynamical modeling of tidal streams
• A review of action estimation methods for galactic dynamics
• Generation of mock tidal streams
• Tidal debris morphology and the orbits of satellite galaxies
• Milky Way Mass and Potential Recovery Using Tidal Streams in a Realistic Halo
• Discovery of a cold stellar stream in the ATLAS DR1 data
• On feathers, bifurcations and shells: the dynamics of tidal streams across the mass scale
• Chaotic Dispersal of Tidal Debris
• Dynamics of stream-subhalo interactions
• Stray, swing and scatter: angular momentum evolution of orbits and streams in aspherical potentials
• Shepherding Tidal Debris with the Galactic Bar: The Ophiuchus Stream
• Inferring the gravitational potential of the Milky Way with a few precisely measured stars
• Detecting the disruption of dark-matter halos with stellar streams
• Torus mapper: a code for dynamical models of galaxies
• Modeling the gravitational potential of a cosmological dark matter halo with stellar streams
• The proper motion of Palomar 5
• Charting Galactic Accelerations with Stellar Streams and Machine Learning
• Tidal Debris as a Dark Matter Probe
• Tidal ribbons
• Inferring the Galactic potential with Gaia and friends: synergies with other surveys
• Building an Acceleration Ladder with Tidal Streams and Pulsar Timing
• On the Fast Track: Rapid construction of stellar stream paths
• The torsion of stellar streams and the overall shape of galactic gravity's source
• Inferring the density and membership of stellar streams with flexible models: The GD-1 stream in Gaia Data Release 3
• A Cartesian catalog of 30 million Gaia sources based on second-order and Monte Carlo error propagation
• The Galactic potential and dark matter density from angular stellar accelerations
• Constraining the population of dark matter halo shapes using hierarchical inference with extragalactic stellar streams