HI synthesis observations of the blue compact dwarf NGC 1705
Cosmology and Nongalactic Astrophysics
2013-01-15 v1
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.
Keywords
Cite
@article{arxiv.1301.2889,
title = {HI synthesis observations of the blue compact dwarf NGC 1705},
author = {E. C. Elson and W. J. G. de Blok and R. C. Kraan-Korteweg},
journal= {arXiv preprint arXiv:1301.2889},
year = {2013}
}
Comments
Published in MNRAS. 13 pages, 14 figures