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Publications of the Astronomical Society of Australia Publications of the Astronomical Society of Australia

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Structure of Dark Halos: Model-independent Information from HI Rotation Curves

Published online by Cambridge University Press:  05 March 2013

Penny D. Sackett
Penny D. Sackett
Affiliation:
Kapteyn Astronomical Institute, 9700 AV Groningen, The Netherlands; psackett@astro.rug.nl
Corresponding
E-mail address:
psackett@astro.rug.nl
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Abstract

Although the approximately flat rotation curves of gas in the outskirts of spirals are generally taken as strong evidence for spherical, isothermal dark matter halos, this conclusion is often incorrect and always model-dependent. A re-examination of the old and (nearly) model-independent inversion technique for determining the surface mass density of galaxies from their kinematics is presented. The method is shown to be relatively insensitive to noise in the kinematics. Due to incomplete kinematical knowledge at large radius, however, the surface mass density is reliable only in the inner half of the galaxy, a result that also applies to traditional rotation curve fitting techniques.

Keywords

galaxies: kinetics dynamics
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 14 , Issue 1 , 1997 , pp. 11 - 14
Copyright
Copyright © Astronomical Society of Australia 1997

References

Begeman, K. G. 1987, PhD thesis, University of Groningen Google Scholar
Binney, J., & Tremaine, S. 1987, Galactic Dynamics (Princeton Univ. Press), 74 Google Scholar
Bosma, A. 1981, AJ, 86, 1825 CrossRefGoogle Scholar
Brandt, J. C. 1960, ApJ, 131, 293 CrossRefGoogle Scholar
Burbidge, E. M., Burbidge, G. R., & Prendergast, K. H. 1959, ApJ, 130, 739 CrossRefGoogle Scholar
Cuddeford, P. 1993, MNRAS, 262, 1076 CrossRefGoogle Scholar
Nordsieck, K. H. 1973, ApJ, 184, 719 CrossRefGoogle Scholar
Sackett, P. D. 1996, Distribution of Dark Matter in Galaxies, in Astrophysical Applications of Gravitational Lensing, Proe. IAU 173, ed. C. Kochanek & J. Hewitt (Dordrecht: Kluwer), 165 Google Scholar
Schneider, S. E. 1985, ApJ, 288, 33L CrossRefGoogle Scholar
Toomre, A. 1963, ApJ, 138, 385 CrossRefGoogle Scholar
van Albada, T. S., & Sancisi, R. 1986, Phil. Trans. Roy. Soc. London, A320, 447 CrossRefGoogle Scholar
Zaritsky, D., & White, S. D. M. 1994, ApJ, 435, 599 CrossRefGoogle Scholar

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