Weighing the local dark matter with RAVE red clump stars

Abstract

We determine the Galactic potential in the solar neigbourhood from RAVE observations. We select red clump stars for which accurate distances, radial velocities, and metallicities have been measured. Combined with data from the 2MASS and UCAC catalogues, we build a sample of 4600 red clump stars within a cylinder of 500 pc radius oriented in the direction of the South Galactic Pole, in the range of 200 pc to 2000 pc distances. We deduce the vertical force and the total mass density distribution up to 2 kpc away from the Galactic plane by fitting a distribution function depending explicitly on three isolating integrals of the motion in a separable potential locally representing the Galactic one with four free parameters. Because of the deep extension of our sample, we can determine nearly independently the dark matter mass density and the baryonic disc surface mass density. We find (i) at 1kpc Kz/(2piG) = 68.5 pm 1.0 Msun/pc2, and (ii) at 2 kpc Kz/(2piG) = 96.9 pm 2.2 Msun/pc2. Assuming the solar Galactic radius at R0 = 8.5 kpc, we deduce the local dark matter density rhoDM (z=0) = 0.0143 pm 0.0011Msun pc3 = 0.542 pm 0.042 Gev/cm3 and the baryonic surface mass density Sigma = 44.4 pm 4.1 Msun/pc2 . Our results are in agreement with previously published Kz determinations up to 1 kpc, while the extension to 2 kpc shows some evidence for an unexpectedly large amount of dark matter. A flattening of the dark halo of order 0.8 can produce such a high local density in combination with a circular velocity of 240 km/s . Another explanation, allowing for a lower circular velocity, could be the presence of a secondary dark component, a very thick disc resulting either from the deposit of dark matter from the accretion of multiple small dwarf galaxies, or from the presence of an effective phantom thick disc in the context of effective galactic-scale modifications of gravity.

arXiv comment14 pages, 13 figures, accepted to Astronomy and Astrophysics

References in corpus (69)

• emcee: The MCMC Hammer
• Validation of the new Hipparcos reduction
• Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
• Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
• The Milky Way Tomography with SDSS: I. Stellar Number Density Distribution
• GAIA: Composition, Formation and Evolution of the Galaxy
• The Radial Velocity Experiment (RAVE): first data release
• Modified Newtonian Dynamics (MOND): Observational Phenomenology and Relativistic Extensions
• Mass models of the Milky Way
• Concentration, Spin and Shape of Dark Matter Haloes as a Function of the Cosmological Model: WMAP1, WMAP3 and WMAP5 results
• The RAVE Survey: Constraining the Local Galactic Escape Speed
• Concentration, Spin and Shape of Dark Matter Haloes: Scatter and the Dependence on Mass and Environment
• A direct dynamical measurement of the Milky Way's disk surface density profile, disk scale length, and dark matter profile at 4 kpc < R < 9 kpc
• The Local Dark Matter Density
• The Milky Way's circular velocity curve between 4 and 14 kpc from APOGEE data
• Constraining the Milky Way potential with a 6-D phase-space map of the GD-1 stellar stream
• The dark matter density at the Sun's location
• The RAdial Velocity Experiment (RAVE): Fourth data release
• The Dark Matter Halo of the Milky Way, AD 2013
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• Modified Newtonian Dynamics in the Milky Way
• The RAVE survey: the Galactic escape speed and the mass of the Milky Way
• Galaxy Disks
• The wobbly Galaxy: kinematics north and south with RAVE red clump giants
• The Radial Velocity Experiment (RAVE): second data release
• Actions for axisymmetric potentials
• Asteroseismic classification of stellar populations among 13000 red giants observed by Kepler
• The local surface density of disc matter mapped by Hipparcos
• Vertical distribution of Galactic disk stars I - Kinematics and metallicity
• Galaxy-Induced Transformation of Dark Matter Halos
• Vertical density waves in the Milky Way disc induced by the Sagittarius Dwarf Galaxy
• Gas Dynamics in the Milky Way: Second Pattern Speed and Large-Scale Morphology
• The colours of the Sun
• Galactic archaeology: mapping and dating stellar populations with asteroseismology of red-giant stars
• Vertical distribution of Galactic disk stars IV - AMR and AVR from clump giants
• The Bar and Spiral Structure Legacy (BeSSeL) Survey: Mapping the Milky Way with VLBI Astrometry
• The RAdial Velocity Experiment (RAVE): Third Data Release
• A secondary clump of red giant stars: why and where
• A new determination of the local dark matter density from the kinematics of K dwarfs
• The Gravitational Potential Near the Sun From SEGUE K-dwarf Kinematics
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• Radial and vertical flows induced by galactic spiral arms: likely contributors to our "wobbly Galaxy''
• Refining the Oort and Galactic constants
• A dark matter disc in three cosmological simulations of Milky Way mass galaxies
• Detection of a radial velocity gradient in the extended local disc with RAVE
• Estimation of the Tilt of the Stellar Velocity Ellipsoid from RAVE and Implications for Mass Models
• The Distribution of Dark Matter in the Milky Way's Disk
• The red clump absolute magnitude based on revised Hipparcos parallaxes
• Slicing and dicing the Milky Way disk in SDSS
• The Oort Constants Measured from Proper Motions
• A new LMC K-band distance from precision measurements of nearby red clump stars
• Vertical distribution of Galactic disk stars : II. The surface mass density in the Galactic plane
• Galactic kinematics with RAVE data: I. The distribution of stars towards the Galactic poles
• Vertical distribution of Galactic disk stars: III. The Galactic disk surface mass density from red clump giants
• Local Surface Density of the Galactic Disk from a 3-D Stellar Velocity Sample
• The Vertical Structure and Kinematics of Grand Design Spirals
• Does the Sagittarius Stream constrain the Milky Way halo to be triaxial?
• Galactic kinematics with modified Newtonian dynamics
• The Information Of The Milky Way From 2MASS Whole Sky Star Count: The Structure Parameters
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• A Galaxy Model from 2MASS Star Counts in the Whole Sky Including the Plane
• Thin disk kinematics from RAVE and the solar motion
• Is Galactic Structure Compatible with Microlensing Data?
• Three-component Stackel potentials satisfying recent estimates of Milky Way parameters
• Galactic Rotation Curve and Spiral Density Wave Parameters from 73 Masers
• Is the Dark Disc contribution to Dark Matter Signals important ?
• A spectroscopic survey of faint, high-Galactic-latitude red clump stars. I. The high resolution sample
• Properties of Galactic Dark Matter: Constraints from Astronomical Observations
• The Milky Way and other spiral galaxies

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