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A high-resolution rotation curve of NGC 6822

Published online by Cambridge University Press:  26 May 2016

W. J. G De Blok ,
D. T. F. Weldrake  and
F. Walter
W. J. G De Blok
Affiliation:
Dept of Physics and Astronomy, Cardiff University, 5 the Parade, Cardiff, CF24 3YB, UK
D. T. F. Weldrake
Affiliation:
RSAA, Mt Stromlo Observatory, Cotter Road, Weston, ACT 2611, Australia
F. Walter
Affiliation:
NRAO AOC, PO Box O, 1003 Lopezville Road, Socorro, NM 87801-0387, USA

Abstract

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We present a high-resolution rotation curve of the Local Group dwarf irregular NGC 6822, obtained with the Australia Telescope Compact Array. the best curve has a resolution of 8″ or 20 pc and contains some 250 independent points. NGC 6822 is a very dark matter-dominated galaxy. There is no evidence for the presence of a steep density cusp down to scales of ~ 20 pc, in conflict with the predictions of CDM.

Type
Part 11: Dwarf Galaxies
Information
Symposium - International Astronomical Union , Volume 220: Dark Matter in Galaxies , 2004 , pp. 373 - 374
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

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