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The three commonly fit surface brightness profiles for elliptical galaxies and the
bulge component of spiral galaxies. The Hubble law (solid line) has core radius
r0 = 1 .0 unit, the de Vaucouleurs law (dash-dot tine) has an effective radius re ...
In the second model, spiral structure is the result of galaxy interactions. A
possible example of this process is shown in Fig. 9. It is likely that all three
processes operate in nature, with density waves producing the most regular
spirals, SSF ...
If galaxies were uniformly distributed in space, the probability. /»,. that a galaxy
would have undergone a close interaction or merger in time r is P, = ir/?J (v„i) Nt
where R is the size of a galaxy, (v,cl) is the mean relative velocity, and N is the ...
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Fusion Devices Explosive 1 Brij Agrawal
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