Galaxy Rotation Curves Without Non-B. Dark Matter

In summary, a paper by J. R. Brownstein and J. W. Moffat, titled "Galaxy Rotation Curves Without Non-Baryonic Dark Matter," was recently accepted for publication in Astrophysical Journal and is set to be published in January 2006. The paper presents fits for individual galaxies without assuming dark matter, which is a controversial topic in the field of astrophysics. While the results may be impressive, some argue that this is only a small step in understanding the larger issue of dark matter and its role in the universe.
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marcus

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This time the news is that on 21 September this paper was accepted for publication in Astrophysical Journal. It will appear in January.

http://www.arxiv.org/abs/astro-ph/0506370
Galaxy Rotation Curves Without Non-Baryonic Dark Matter
J. R. Brownstein, J. W. Moffat
43 pages, 7 figures, 4 tables, 101 galaxies.

Submitted to ApJ, June 20, 2005. Accepted for publication in ApJ, September 21, 2005. To be published in ApJ 636 (January 10, 2006)

Graphically the fits look impressively good. We have seen this from Moffat before. There are about 100 plots for individual galaxies.

Plus there is a lot of other stuff, like about clusters---plots and tables.

the trouble is Moffat's work is not exactly main stream. he does not assume dark matter. It must be something of a struggle to get a paper like this published. the thought that it could conceivably be right makes one a little giddy

perhaps SpaceTiger will have something bracing to say about the Moffaty modification of gravity.
 
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You might be able to dance around dark matter to model galaxy rotation curves, but there is no reasonable way to avoid dark matter when you look at SDSS and WMAP data without discarding things like the FRW model, big bang, inflation and expansion. Right now that looks like recommending exploratory brain surgery to explain a headache. Don't get me wrong, I'm not railing against solving rotation curves without dark matter. I only contend this is a baby step. More difficult issues remain to be addressed. For example, see Probing the Darkness:
http://www.seasky.org/cosmic/sky7a11.html
 

What is a galaxy rotation curve without non-baryonic dark matter?

A galaxy rotation curve without non-baryonic dark matter is a graph that shows the rotation speed of stars and gas in a galaxy as a function of their distance from the center. It is used to study the distribution of mass in a galaxy and can provide insights into the nature of dark matter.

What is the difference between a galaxy rotation curve with and without non-baryonic dark matter?

A galaxy rotation curve with non-baryonic dark matter would show a steady increase in rotation speed as distance from the center increases, while a galaxy rotation curve without non-baryonic dark matter would show a decrease in rotation speed at large distances.

How is a galaxy rotation curve without non-baryonic dark matter calculated?

A galaxy rotation curve without non-baryonic dark matter is calculated by measuring the velocities of stars and gas at different distances from the center of a galaxy and plotting them on a graph.

What are the implications of a galaxy rotation curve without non-baryonic dark matter?

If a galaxy rotation curve without non-baryonic dark matter is found to be accurate, it would suggest that the current understanding of the distribution of mass in galaxies may be incomplete and that there may be other factors at play.

What are some potential explanations for a galaxy rotation curve without non-baryonic dark matter?

Some potential explanations for a galaxy rotation curve without non-baryonic dark matter include modifications to the laws of gravity, the presence of additional forms of matter that are not baryonic or dark matter, or the possibility that our understanding of gravity and the laws of physics is incomplete.

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