A good correlation is found between the outer gradient of the rotation curve and the galaxy's distance from the centre of the cluster, in the sense that the inner galaxies tend to have falling rotation curves while the outer galaxies, and field galaxies, tend to have flat or rising rotation...
9. FIGURE CAPTIONS 1) Rotation curves of spiral galaxies under the generalized Einstein action. The numbers on the curves indicate the values of a in Eq. (2.23). The prediction of Newtonian theory for a = 2 is also given by a broken curve for comparison. 2) Scale factor of universe as...
The rotation curve data for spiral galaxies are consistent with the dark matter distributed in their halo. This dark halo constitutes much of the galaxy’s total mass. All baryonic matter (stars, star clusters, ISM, etc.) are held together by the gravitational potential of this dark matter ha...
galaxies : spiralEDGE-ON GALAXIESRADIAL DISTRIBUTIONSNEARBY GALAXIESSTAR-FORMATIONSTELLAR DISCSDUSTThe observed anti-correlation between the inclination and the slope of the innermost part of the rotation curve can be attributed to dust extinction. However, the implied central face-on opacity of tau =...
A sample of 22 spiral galaxy rotation curves, measured in the 21 cm line of neutral hydrogen, is considered in the context of Milgrom's modified dynamics (MOND). Combined with the previous, highly selected sample of Begeman et al., this constitutes the current total sample of galaxies with ...
flatgalaxy. •Severalrotationcurveofedge-ongalaxiesappearsignsoflargeextinc- tionintheplaneofthegalaxyspiralarms,whichisintersected by the line of sight at small angles. • Nevertheless, the galaxies under study show a close correlation between the rotation amplitudes, as inferred from the H α...
Our direct method rests on the simulation of a spiral galaxy by a disc of N massive bodies distributed with an axial symmetry. As these bodies follow a given curve of rotation, then the balance of the radial forces between N bodies leads to a set of linear equations (the unknown are ...
You might want to look up the history of that to see exactly what they did to arrive at those numbers. Part of it might have even been theoretical models of the galaxy's rotational curve, and may (or may not) have taken into account the postulated Dark Matter effects. #4 yuzameh ...
A new classification scheme for spiral galaxies (Block & Puerari 1999) has been developed which classifies galaxies on the basis of their near-IR arm morphology. This 'dustpenetrated class ' predicts a correlation between spiral arm pitch angle and rotation curve type (or shear rate A/ω, whe...
(35 A/mm in the 6450-6800 A range and 92 A/mm in the 3700-5100 A range) yield a linear rotation curve for the peculiar edge-on galaxy NGC 2976; the curve is slightly steeper for the NW region than for the SE one; this leads to a very small mass of two billion solar masses. ...