Dark Matter in Spiral Galaxies

Buchhorn, Markus

doi:10.1017/s1323358000027259

Publ. Astron. Soc. Aust.

1993

DOI: 10.1017/s1323358000027259

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Dark Matter in Spiral Galaxies

Markus Buchhorn

Abstract: A c k n o w le d g e m e n ts The job of surveying over 1000 galaxies (now over 2000) cannot be achieved by one person in the duration of a single thesis. This monumental work took the combined efforts of my supervisor, Prof. D.S. Mathewson, his research assistant, Mr. V.F. Ford, and myself. Furthermore, various students were involved.

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2002

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Properties of dark matter haloes

Combes¹

2002

New Astronomy Reviews

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An overview is presented of the main properties of dark matter haloes, as we know them from observations, essentially from rotation curves around spiral and dwarf galaxies. Detailed rotation curves are now known for more than a thousand galaxies, revealing that they are not so flat in the outer parts, but rising for late-types, and falling for early-types. A well established result now is that most bright galaxies are not dominated by dark matter inside their optical disks. Only for dwarfs and LSB (Low Surface Brightness galaxies) dark matter plays a dominant role in the visible regions. The 3D-shape of haloes are investigated through several methods, that will be discussed: polar rings, flaring of HI planes, X-ray isophotes. It is not yet possible with rotation curves to know how far haloes extend, but tentatives have been made. It will be shown that the dark matter appears to be coupled to the gas in spirals and dwarfs, suggesting that dark baryons could play the major role in rotation curves. Theories proposing to replace the non-baryonic dark matter by a different dynamical or gravity law, such as MOND, have to take into account the dark baryons, especially since their spatial distribution is likely to be quite different from the visible matter.

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Properties of dark matter haloes

Combes¹

2002

New Astronomy Reviews

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Dark Matter in Spiral Galaxies

Cited by 1 publication

References 110 publications

Properties of dark matter haloes

Properties of dark matter haloes

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