Measuring the Sun's Motion with Stellar Streams

Abstract

We present a method for measuring the Sun's motion using the proper motions of Galactic halo star streams. The method relies on the fact that the motion of the stars perpendicular to a stream from a low-mass progenitor is close to zero when viewed from a non-rotating frame at rest with respect to the Galaxy, and that the deviation from zero is due to the reflex motion of the observer. The procedure we implement here has the advantage of being independent of the Galactic mass distribution. We run a suite of simulations to test the algorithm we have developed, and find that we can recover the input Solar motion to good accuracy with data of the quality that will soon become available from the ESA/Gaia mission.

8 pages, 6 figures, accepted for publication in MNRAS

References in corpus (33)

• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• Local Kinematics and the Local Standard of Rest
• Evolution of asymptotic giant branch stars II. Optical to far-infrared isochrones with improved TP-AGB models
• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: I. Morphology of the Sagittarius Core and Tidal Arms
• Local stellar kinematics from Hipparcos data
• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• The Proper Motion of Sgr A*: II. The Mass of Sgr A*
• Chemical evolution with radial mixing
• The Milky Way Tomography with SDSS: II. Stellar Metallicity
• Detection of massive tidal tails around the globular cluster Pal 5 with SDSS commissioning data
• Gaia broad band photometry
• Great Circle tidal streams: evidence for a nearly spherical massive dark halo around the Milky Way
• Constraining the Milky Way potential with a 6-D phase-space map of the GD-1 stellar stream
• Mass models of the Milky Way
• Detection of a 63 Degree Cold Stellar Stream in the Sloan Digital Sky Survey
• Uncovering CDM halo substructure with tidal streams
• A Very Fast and Momentum-Conserving Tree Code
• How Lumpy is the Milky Way's Dark Matter Halo?
• Globular Cluster Streams as Galactic High-Precision Scales - The Poster Child Palomar 5
• Modeling the disruption of the globular cluster Pal5 by Galactic tides
• Galactic masers and the Milky Way circular velocity
• The shape of the inner Milky Way halo from observations of the Pal 5 and GD-1 stellar streams
• Substructure in Dark Halos: Orbital Eccentricities and Dynamical Friction
• Trigonometric Parallaxes of 6.7 GHz Methanol Masers
• Taking the Measure of the Universe: Precision Astrometry with SIM PlanetQuest
• A Synoptic Map of Halo Substructures from the Pan-STARRS1 3π Survey
• Discovery of a cold stellar stream in the ATLAS DR1 data
• Serendipitous Discovery of a Thin Stellar Stream near the Galactic Bulge in the Pan-STARRS1 3Pi Survey
• Tidal tails around the outer halo globular clusters Eridanus and Palomar 15
• The Transverse velocity of the Andromeda system, derived from the M31 satellite population
• Measuring Fundamental Galactic Parameters with Stellar Tidal Streams and SIM PlanetQuest
• Estimation of the SolarGalactocentric Distance and Rotation Velocity from Near-Solar-Circle Objects
• Near-Solar-Circle Method for Determination of the Galactic Constants

Cited by in corpus (5)

• The total mass of the Large Magellanic Cloud from its perturbation on the Orphan stream
• Ghostly Tributaries to the Milky Way: Charting the Halo's Stellar Streams with the Gaia DR2 catalogue
• Modelling the Tucana III stream - a close passage with the LMC
• Constraining the Solar Galactic Reflex Velocity Using Gaia Observations of the Sagittarius Stream
• Constraining Solar position and velocity with a Nearby Hypervelocity Star