HI synthesis observations of the blue compact dwarf NGC 1705

Abstract

Australia Telescope Compact Array HI-line observations of the nearby dwarf galaxy NGC 1705 are presented. The data are used to trace the gravitational potential of the galaxy out to several stellar disc scale lengths. A rotation curve is derived for the system and used to generate mass models. Dark matter dominates the gravitational potential at nearly all galactocentric radii. NFW and pseudo-isothermal sphere halo parameterisations allowing for good reproductions of the observations. The models suggest NGC 1705 to have a dark matter halo that it much denser and more compact than previously thought.

arXiv commentPublished in MNRAS. 13 pages, 14 figures

References in corpus (19)

• A Universal Density Profile from Hierarchical Clustering
• Starburst-driven Mass Loss from Dwarf Galaxies: Efficiency and Metal Ejection
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• Observational and Theoretical Constraints on Singular Dark Matter Halos
• The dark and baryonic matter content of low surface brightness disk galaxies
• The Westerbork HI Survey of Spiral and Irregular Galaxies I. HI Imaging of Late-type Dwarf Galaxies
• High-resolution dark matter density profiles of THINGS dwarf galaxies: Correcting for non-circular motions
• Compact Stellar Systems in the Fornax Cluster: Super-massive Star Clusters or Extremely Compact Dwarf Galaxies?
• The central region of the Fornax cluster -- II. Spectroscopy and radial velocities of member and background galaxies
• The Survey for Ionization in Neutral Gas Galaxies: I. Description and Initial Results
• Ultra-Compact Dwarf Galaxies in the Fornax Cluster
• NGC 2915. II. A Dark Spiral Galaxy With A Blue Compact Dwarf Core
• Halpha rotation curves: the soft core question
• The Resolved Stellar Populations in NGC 1705
• Star Formation and the ISM in Four Dwarf Irregular Galaxies
• The Star Formation History of NGC 1705: a Post-Starburst Galaxy on the Verge of Activity
• The Taxonomy of Blue Amorphous Galaxies: II. Structure and Evolution
• Observed Properties of Dark Matter: dynamical studies of dSph galaxies
• Star Formation Models for the Dwarf Galaxies NGC 2915 and NGC 1705

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• Local starburst galaxies and their descendants
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• Dynamics of Starbursting Dwarf Galaxies. III. A HI study of 18 nearby objects
• Decoupled Sectors and Wolf-Rayet Galaxies