The vertical force in the Solar Neighbourhood using red clump stars in TGASxRAVE - Constraints on the local dark matter density

Abstract

We investigate the kinematics of red clump stars in the Solar Neighbourhood by combining data from TGAS and RAVE to constrain the local dark matter density. After calibrating the absolute magnitude of red clump stars, we characterize their velocity distribution over a radial distance range of $6$-$10$ kpc and up to $1.5$ kpc away from the Galactic plane. We then apply the axisymmetric Jeans equations on subsets representing the thin and thick disks to determine the (local) distribution of mass near the disk of our Galaxy. Our kinematic maps are well-behaved permitting a straightforward local determination of the vertical force, which we find to be $K_z^{\mathrm{thin}}=-2454\pm 619$ and $K_z^{\mathrm{thick}}=-2141\pm 774$ $(km/s{)}^2/\mathrm{kpc}$ at $1.5$ kpc away from the Galactic plane for the thin and thick disk samples and for thin and thick disk scale heights of 0.28 kpc and 1.12 kpc respectively. These measurements can be translated into a local dark matter density ${\rho }_{\text{DM}}\sim 0.018\pm 0.002M_{\odot }/{\text{pc}}^3$. The systematic error on this estimate is much larger than the quoted statistical error, since even a 10% difference in the scale height of the thin disk leads to a 30% change in the value of ${\rho }_{\text{DM}}$, and a nearly equally good fit to the data.

arXiv comment9 pages, 10 figures. Submitted to A&A

References in corpus (31)

• The Gaia mission
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• Local Kinematics and the Local Standard of Rest
• The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
• The Galaxy in Context: Structural, Kinematic and Integrated Properties
• The Milky Way Tomography with SDSS: I. Stellar Number Density Distribution
• Mass models of the Milky Way
• Gravity modes as a way to distinguish between hydrogen- and helium-burning red giant stars
• The Radial Velocity Experiment (RAVE): Fifth Data Release
• The spatial structure of mono-abundance sub-populations of the Milky Way disk
• The dark matter density at the Sun's location
• The photometric structure of the inner Galaxy
• The wobbly Galaxy: kinematics north and south with RAVE red clump giants
• Stars, Gas, and Dark Matter in the Solar Neighborhood
• Starcounts Redivivus. IV. Density Laws Through Photometric Parallaxes
• A First Constraint on the Thick Disk Scale Length: Differential Radial Abundances in K Giants at Galactocentric Radii 4, 8, and 12 kpc
• Constraining the Galaxy's dark halo with RAVE stars
• Stellar Inventory of the Solar Neighborhood using Gaia DR1
• Kinematical and chemical vertical structure of the Galactic thick disk II. A lack of dark matter in the solar neighborhood
• The Local Dark Matter Density from SDSS-SEGUE G-dwarfs
• The age-velocity dispersion relation of the Galactic discs from LAMOST-Gaia data
• Tracing the Hercules stream with Gaia and LAMOST: new evidence for a fast bar in the Milky Way
• Red clump stars and Gaia: Calibration of the standard candle using a hierarchical probabilistic model
• The 3D Velocity Structure of the Thick Disk from SPM4 and RAVE DR2
• Is the Milky Way still breathing? RAVE-Gaia streaming motions
• The tilt of the velocity ellipsoid in the Milky Way disk
• Improved distances and ages for stars common to TGAS and RAVE
• Galactoseismology and the Local Density of Dark Matter
• A non-parametric method for measuring the local dark matter density
• Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS
• On local dark matter density

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• Dark matter local density determination: recent observations and future prospects
• Measuring the local dark matter density with LAMOST DR5 and Gaia DR2
• First Gaia dynamical model of the Milky Way disc with six phase space coordinates: a test for galaxy dynamics
• The Stellar Distribution Function and Local Vertical Potential from Gaia DR2
• Stellar disc streams as probes of the Galactic potential and satellite impacts
• Direct Detection Anomalies in light of $Gaia$ Data
• Equilibrium axisymmetric halo model for the Milky Way and its implications for direct and indirect DM searches
• Vertical stellar density distribution in a non-isothermal galactic disc
• General model of vertical distribution of stars in the Milky Way using complete Jeans equations
• A low-mass dark matter project, ALETHEIA: A Liquid hElium Time projection cHambEr In dArk matter
• Effect of the Solar dark matter wake on planets