I have tried using noise/blue etc. to create a similar effect. It looks similar but not quite as graduated. I’m interested in hearing about different approaches!
- Set your background to black, and create an ellipse
- Add a new layer, fill it with solid gray, then Filter > Noise > Add Noise and add a little gaussian blur ( Filter > Blur > Gaussian Blur )
- Apply the blending effect
Color Burnto the noise layer
- Go back to your ellispe and apply your gradient effect ( Layer > Layer Style > Gradient Overlay ) this way you can adapt the graduation of the gradient.
- Et voilà !