Does the Second Caustic Ring of Dark Matter Cause the Monoceros Ring of Stars ?

Abstract

Caustic rings of dark matter were predicted to exist in the plane of the Galaxy at radii $a_n\simeq 40\mathrm{kpc}/n$ for $n=1,2,\mathrm{3..}$. The recently discovered Monoceros Ring of stars is located near the $n=2$ caustic, prompting us to consider a possible connection between these two objects. We identify two processes through which the Monoceros Ring of stars may have formed. One process is the migration of gas to an angular velocity minimum at the caustic leading to enhanced star formation there. The other is the adiabatic deformation of star orbits as the caustic slowly grows in mass and radius. The second process predicts an order 100% enhancement of the density of disk stars at the location of the caustic ring.

arXiv comment21 pages, 3 figures

References in corpus (40)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• The Ghost of Sagittarius and Lumps in the Halo of the Milky Way
• A Low Latitude Halo Stream around the Milky Way
• Outer structure of the Galactic warp and flare: explaining the Canis Major over-density
• One Ring to Encompass them All: A giant stellar structure that surrounds the Galaxy
• A High Resolution Search for Dark-Matter Axions
• A comprehensive model for the Monoceros tidal stream
• Annual Modulation of Dark Matter in the Presence of Streams
• The secondary infall model of galactic halo formation and the spectrum of cold dark matter particles on Earth
• Exploring Halo Substructure with Giant Stars: Spectroscopy of Stars in the Galactic Anticenter Stellar Structure
• WIMP Annual Modulation with Opposite Phase in Late-Infall Halo Models
• Caustic rings of dark matter
• The velocity peaks in the cold dark matter spectrum on Earth
• The geometry of phase mixing
• Diurnal and Annual Modulation of Cold Dark Matter Signals
• The caustic ring singularity
• Probing the Canis Major stellar over-density as due to the Galactic warp
• On the nature of the ring-like structure in the outer Galactic disk
• Evidence for Ring Caustics in the Milky Way
• Recoil Detection of the Lightest Neutralino in MSSM Singlet Extensions
• Results of a Search for Cold Flows of Dark Matter Axions
• Neutralino Gamma-ray Signals from Accreting Halo Dark Matter
• The Inner Caustics of Cold Dark Matter Halos
• Theoretical Directional and Modulated Rates for Direct SUSY Dark Matter Detection
• A radial velocity survey of low Galactic latitude structures: I. Kinematics of the Canis Major dwarf galaxy
• Searching for Supersymmetric Dark Matter - The Directional Rate and the Modulation Effect Due to Caustic Rings
• Gravitational cooling and density profile near caustics in collisionless dark matter haloes
• A potential WIMP signature for the caustic ring halo model
• Particle Annihilation in Cold Dark Matter Micropancakes
• Robustness of Discrete Flows and Caustics in Cold Dark Matter Cosmology
• Evidence for universal structure in galactic halos
• A radial velocity survey of low Galactic latitude structures: III. The Monoceros Ring in front of the Carina and Andromeda galaxies
• Gravitational Lensing by Cold Dark Matter Catastrophes
• Gravitational Lensing by Dark Matter Caustics
• $\gamma$-ray flux from Dark Matter Annihilation in Galactic Caustics
• WIMP annihilation in caustics
• Gravitational Lensing and Structural Stability of Dark Matter Caustic Rings
• Probing Cold Dark Matter Cusps by Gravitational Lensing

Cited by in corpus (21)

• LAMOST Experiment for Galactic Understanding and Exploration (LEGUE) The survey science plan
• Dark matters on the scale of galaxies
• The Caustic Ring Model of the Milky Way Halo
• Updating the MACHO fraction of the Milky Way dark halo with improved mass models
• The Case for Axion Dark Matter
• Model-Independent Determination of the WIMP Mass from Direct Dark Matter Detection Data
• Tails and streams around the Galactic globular clusters NGC1851, NGC1904, NGC2298 and NGC2808
• Mapping the Monoceros Ring in 3D with Pan-STARRS1
• On Rings and Streams in the Galactic Anti-Center
• A deep view of the Monoceros ring in the Anticenter direction: clues of its extra-Galactic origin
• Spectroscopic hint of a cold stream in the direction of the globular cluster NGC 1851
• On the Origin of the Monoceros Ring - I: Kinematics, proper motions, and the nature of the progenitor
• Effects of Residue Background Events in Direct Dark Matter Detection Experiments on the Determination of the WIMP Mass
• A Megacam Survey of Outer Halo Satellites. IV. Two foreground populations possibly associated with the Monoceros substructure in the direction of NGC2419 and Koposov2
• Resolving infall caustics in dark matter halos
• Effects of a caustic ring of dark matter on the distribution of stars and interstellar gas
• Dark Matter Caustics in Galaxy Clusters
• Caustics, cold flows, and annual modulation
• The gravitational force field of proto-pancakes
• Effects of a dark matter caustic passing through the Oort cloud
• The nine rings of the galaxy LEDA 1313424