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3
votes
1answer
55 views

Questions about shape of dark matter orbits in spiral galaxies

Could someone please describe how are the proposed (calculated) orbits of dark matter? Are they exactly as those of baryonic matter (i.e. spiral), or they are different from those of baryonic matter? ...
0
votes
1answer
32 views

Data for Tully-Fisher Relation

I have a derivation of the Tully-Fisher Relation and I'd like to test it against some real data. Does anyone know of a catalog where I can find the maximum velocity ($V_{flat}$) and radius (of ...
2
votes
0answers
34 views

Comparing $X_\text{red}^2$ statistics for cosmological models

I'm evaluating a cosmological model which competes with ΛCDM. I have charted the $Χ_{red}^2$ and $R^2$ statistics for the sample of galaxies from McGaugh et al (2001) for my model and ΛCDM. Each ...
2
votes
0answers
63 views

Bulge-Disk decomposition in galaxies

I'm starting a new project on dark matter astrophysics in which I have to extract from some data (I will write some below) the surface brightness, to later construct the mass density profiles of de ...
2
votes
0answers
45 views

Milky way rotation data

Can anyone tell me where I can download sample rotation curve data for the Milky Way in csv format?
1
vote
0answers
19 views

Galactic Rotation Curve Calculation

Can anyone give the list of formulas used for plotting the Galactic Rotation Curves? I mean, is there only the formula for linear velocity or is the formula for the gravitational potential also ...
1
vote
0answers
65 views

Why do planets moving around our Sun lead to how stars move around the centre of a spiral galaxy?

We know that the speed with which the planets go around our sun decreases as a function of the distance they are from the sun. Since stars are not planets, and presumably do not behave like planets, ...
0
votes
0answers
24 views

Baryonic Mass Distribution within a Galaxy

My question is related to world-famous galaxy rotation problem and famous diagrams of speed of stars against the distance from the center of the galaxy where "expected" speeds are decreasing with the ...