The Kinematics in the Core of the Low Surface Brightness Galaxy DDO 39

Abstract

We present a high resolution, SparsePak two-dimensional velocity field for the center of the low surface brightness (LSB) galaxy DDO 39. These data are a significant improvement on previous HI or Halpha long slit data, yet the inner rotation curve is still uncertain due to significant noncircular and random motions. These intrinsic uncertainties, probably present in other LSB galaxies too, result in a wide range of inner slopes being consistent with the data, including those expected in cold dark matter (CDM) simulations. The halo concentration parameter provides a more useful test of cosmological models than the inner slope as it is more tightly constrained by observations. DDO 39's concentration parameter is consistent with, but on the low end of the distribution predicted by CDM.

arXiv comment4 pages, accepted for publication in ApJ Letters

References in corpus (24)

• A Universal Density Profile from Hierarchical Clustering
• Profiles of dark haloes: evolution, scatter, and environment
• Cold collapse and the core catastrophe
• The Inner Structure of LambdaCDM Halos I: A Numerical Convergence Study
• H alpha rotation curves of Low Surface Brightness galaxies
• Mass Density Profiles of LSB Galaxies
• The dark and baryonic matter content of low surface brightness disk galaxies
• Substructure and halo density profiles in a Warm Dark Matter Cosmology
• The Central Mass Distribution in Dwarf and Low Surface Brightness Galaxies
• Halo Properties in Cosmological Simulations of Self-Interacting Cold Dark Matter
• The Phase-Space Density Profiles of Cold Dark Matter Halos
• The Westerbork HI Survey of Spiral and Irregular Galaxies I. HI Imaging of Late-type Dwarf Galaxies
• Dwarf Galaxy Rotation Curves and the Core Problem of Dark Matter Halos
• On the Origin of Cusps in Dark Matter Halos
• Constraints on the Structure of Dark Matter Halos from the Rotation Curves of Low Surface Brightness Galaxies
• High-resolution rotation curves of low surface brightness galaxies: Data
• High Resolution Rotation Curves of Low Surface Brightness Galaxies
• Holes and Shells in the Interstellar Medium of the Nearby Dwarf Galaxy IC 2574
• Halpha rotation curves: the soft core question
• Accurate Determination of the Mass Distribution in Spiral Galaxies: II. Testing the Shape of Dark Halos
• Evidence for tidal interaction and a supergiant HI shell in the Local Group dwarf galaxy NGC 6822
• Inflation, cold dark matter, and the central density problem
• The Westerbork HI Survey of Spiral and Irregular Galaxies II. R-Band Surface Photometry of Late-type Dwarf Galaxies
• Merger Histories in Warm Dark Matter Structure Formation Scenario

Cited by in corpus (46)

• SparsePak: A Formatted Fiber Field Unit for The WIYN Telescope Bench Spectrograph. I. Design, Construction, and Calibration
• At the heart of the matter: the origin of bulgeless dwarf galaxies and Dark Matter cores
• The Core-Cusp Problem
• High-Resolution Measurements of the Halos of Four Dark Matter-Dominated Galaxies: Deviations from a Universal Density Profile
• Mass Models for Low Surface Brightness Galaxies with High Resolution Optical Velocity Fields
• The impact of dark matter cusps and cores on the satellite galaxy population around spiral galaxies
• A Chandra View of Dark Matter in Early-Type Galaxies
• The rotation curves shapes of late-type dwarf galaxies
• The DiskMass Survey. VII. The distribution of luminous and dark matter in spiral galaxies
• A kinematic study of the Andromeda dwarf spheroidal system
• Modeling Non-Circular Motions in Disk Galaxies: Application to NGC 2976
• Empirical Models for Dark Matter Halos. II. Inner profile slopes, dynamical profiles, and rho/sigma^3
• Dark Matter from Early Decays
• High-Resolution Measurements of the Dark Matter Halo of NGC 2976: Evidence for a Shallow Density Profile
• Bose-Einstein condensation of dark matter solves the core/cusp problem
• High Resolution Optical Velocity Fields of 11 Low Surface Brightness Galaxies
• Dynamical Centers and Non-Circular Motions in THINGS Galaxies: Implications for Dark Matter Halos
• Is there Evidence for Flat Cores in the Halos of Dwarf Galaxies?: The Case of NGC 3109 and NGC 6822
• Dwarf Galaxy Dark Matter Density Profiles Inferred from Stellar and Gas Kinematics
• KMOS^3D: Dynamical constraints on the mass budget in early star-forming disks
• The Rotation Velocity Attributable to Dark Matter at Intermediate Radii in Disk Galaxies
• The DiskMass Survey. II. Error Budget
• Testing Modified Newtonian Dynamics with Rotation Curves of Dwarf and Low Surface Brightness Galaxies
• Mass Modeling of Disk Galaxies: Constraints, Degeneracies and Adiabatic Contraction
• The slope of the Baryonic Tully-Fisher relation
• H-alpha Kinematics of the SINGS Nearby Galaxies Survey. II
• The Tully-Fisher Relation of Barred Galaxies
• Constraining the NFW Potential with Observations and Modeling of LSB Galaxy Velocity Fields
• Density profile slope in Dwarfs and environment
• On the Density profile slope of Clusters of Galaxies
• SparsePak: A Formatted Fiber Field-Unit for The WIYN Telescope Bench Spectrograph. II. On-Sky Performance
• The Dark Matter Radial Profile in the Core of the Relaxed Cluster A2589
• The DiskMass Survey. IV. The Dark-Matter-Dominated Galaxy UGC 463
• The Photometric and Kinematic Structure of Face-On Disk Galaxies. I. Sample Definition, H-alpha Integral Field Spectroscopy, and HI Line-Widths
• The new semianalytic code GalICS 2.0 - Reproducing the galaxy stellar mass function and the Tully-Fisher relation simultaneously
• Structure and dynamics of galaxies with a low surface brightness disc. I. The stellar and ionised-gas kinematics
• A High-Resolution Study of the HI Content of Local Group Dwarf Irregular Galaxy WLM
• The scaling relations of galaxy clusters and their dark matter halos
• The baryonic mass-velocity relation; clues to feedback processes during structure formation and the cosmic baryon inventory
• Nuclear Rings in Galaxies---A Kinematic Perspective
• BDM Dark Matter: CDM with a core profile and a free streaming scale
• Galaxy luminosity function and Tully-Fisher relation: reconciled through rotation-curve studies
• VIMOS-VLT Integral Field Kinematics of the Giant Low Surface Brightness Galaxy ESO 323-G064
• Galaxy rotation curves in the $\mu$-deformation based approach to dark matter
• How to recover both velocity components in discs of barred galaxies with integral-field spectroscopy
• Detection of non-ordered central gas motions in a sample of four low surface brightness galaxies