The present and future mass of the Milky Way halo

  title={The present and future mass of the Milky Way halo},
  author={Mark I. Wilkinson and N. Wyn Evans},
  journal={Monthly Notices of the Royal Astronomical Society},
  • M. Wilkinson, N. Evans
  • Published 11 June 1999
  • Physics
  • Monthly Notices of the Royal Astronomical Society
A simple model for the Milky Way halo is presented. It has a flat rotation curve in the inner regions, but the density falls off sharply beyond an outer edge. This truncated, flat rotation curve (TF) model possesses a rich family of simple distribution functions which vary in velocity anisotropy. The model is used to estimate the total mass of the Milky Way halo using the latest data on the motions of satellite galaxies and globular clusters at Galactocentric radii greater than 20 kpc. This… Expand
The Mass of the Milky Way: Limits from a newly assembled set of halo objects
We set new limits on the mass of the Milky Way, making use of the latest kinematic information for Galactic satellites and halo objects. Our sample consists of 11 satellite galaxies, 137 globularExpand
Milky Way mass models for orbit calculations
Studying the trajectories of objects like stars, globular clusters or satellite galaxies in the Milky Way allows to trace the dark matter halo but requires reliable models of its gravitationalExpand
Rotation Curve of the Milky Way out to ~200 kpc
The rotation curve (RC) of our Galaxy, the Milky Way, is constructed starting from its very inner regions (few hundred parsecs) out to a large galactocentric distance of ~200 kpc using kinematicalExpand
The mass distribution and gravitational potential of the Milky Way
We present mass models of the Milky Way created to fit observational constraints and to be consistent with expectations from theoretical modelling. The method used to create these models is thatExpand
The Masses of the Milky Way and Andromeda galaxies
We present a family of robust tracer mass estimators to compute the enclosed mass of galaxy haloes from samples of discrete positional and kinematical data of tracers, such as halo stars, globularExpand
Here we present a kinematic study of the Galactic halo out to a radius of ∼ 60 kpc, using 4664 blue horizontal branch (BHB) stars selected from the SDSS/SEGUE survey, to determine key dynamicalExpand
Rotation curve and mass distribution in the Galaxy from the velocities of objects at distances up to 200 kpc
Three three-component (bulge, disk, halo) model Galactic gravitational potentials differing by the expression for the dark matter halo are considered. The central (bulge) and disk components areExpand
Rotation of halo populations in the Milky Way and M31
We search for signs of rotation in the subsystems of the Milky Way and M31 that are defined by their satellite galaxies, their globular cluster populations and their Blue Horizontal Branch (BHB)Expand
Evidence for an Intermediate-mass Milky Way fromGaiaDR2 Halo Globular Cluster Motions
We estimate the mass of the Milky Way (MW) within 21.1 kpc using the kinematics of halo globular clusters (GCs) determined by Gaia. The second Gaia data release (DR2) contained a catalogue ofExpand
The mass of our Milky Way
We perform an extensive review of the numerous studies and methods used to determine the total mass of the Milky Way. We group the various studies into seven broad classes according to their modelingExpand


Declining Rotation Curve and Brown Dwarf MACHOs
If the Galactic rotation speed at the solar circle is ~200 km s-1 or smaller, as is supported by several recent studies, the rotation curve of the Galaxy could be declining in the outermost region.Expand
The mass of the Milky Way galaxy
We use the Jaffe model as a global mass distribution for the Galaxy and determine the circular velocity $v_c$ and the Jaffe radius $r_j$ using the satellites of the Galaxy, estimates of the localExpand
The distribution of dark matter in the halo of M87
We investigate the constraints that can be placed on the distribution of dark matter around M87 using the 43 globular cluster velocities reported by Mould et al. [AJ, 99, 1823 (1990)]. If theExpand
The LMC Microlensing Events: Evidence for a Warped and Flaring Milky Way Disk?
The simplest interpretation of the microlensing events toward the Large Magellanic Cloud detected by the MACHO and EROS collaborations is that about one-third of the halo of our own Milky Way galaxyExpand
Globular cluster orbits based on Hipparcos proper motions
Abstract We present and analyse space motions and orbits for a sample of 15 galactic globular clusters. The absolute proper motions of these clusters have been determined with respect to referenceExpand
Microlensing of tidal debris on the Magellanic great circle
Increasing evidence suggests that the Galactic halo is lumpy on kpc scales as a result of the accretion of at least a dozen small galaxies [Large and Small Magellanic Clouds (LMC/SMC), Sgr, Fornax,Expand
The Young Globular Clusters of the Milky Way and the Local Group Galaxies: Playing With Great Circles
The small group of Galactic Globular Clusters (GGC) (Pal 12, Terzan 7, Ruprecht 106, Arp 2) recently discovered to be significantly younger (by ~3-4 Gyr) than the average cluster population of theExpand
The Hipparcos proper motion of the Magellanic Clouds
Abstract The proper motion of the Large (LMC) and Small (SMC) Magellanic Cloud using data acquired with the Hipparcos satellite is presented. Hipparcos measured 36 stars in the LMC and 11 stars inExpand
Stars within the Large Magellanic Cloud as potential lenses for observed microlensing events
MASSIVE compact objects in the Galactic halo, known as MACHOs, have been postulated as the origin of a substantial fraction of the 'dark matter' known to exist in the haloes of galaxies1,2.Expand
Velocities of stars in remote Galactic satellites and the mass of the Galaxy
Observations of the two most distant known dwarf spheroidal Galactic satellites, Leo I and II, and of two remote globular clusters, Eridanus and Pal 14, are presented. It is demonstrated that etalonExpand