Recent content by nicu15

I've already done that part. Computed the flux in and compared it with the flux out of the disk. got a temperature of $T_{disk}=T\sqrt{\frac{R}{d}}$ where d is the distance from the sun to the disk and R is the radius of the sun.

Lens & Disk The image of the sun is projected on the disk using a lens of radius r<<d and focal length f<<d (d is the distance between the sun and the disk.. The magnification of the lens is M`f/d, so that the image completely fills the disk R`=MR. When the disk reaches thermal equilibrium...

Say we have the situation described above (Minkowski glued with the space time described by the metric above( cylindrical coordinates)) in order define the hypersurface i need to provide intrinsic coordinates that describe it. Usually I would chose {tal , phi, z}. Is there a problem with...

s is constant, being the radius of a cylinder

I'm trying to connect minkowski ( cylindrical coordinates) to the metric presented above.

That might work, Thanks!

Thanks WannabeNewton! Im working with D-I junction conditions, and i need the induced metrics of two manifolds to be equal in order to "glue" them together. Having the metrics in gaussian coordinates seems to simplify the problem.

Given a specific metric, is there a easy way to transform it in Synchronous coordinates? For example having dsigma2 = (1+z)^2 dt^2 - ds^2 - s^2 dphi^2 - dz^2 , I was able to do some substitutions, but I had to stop at the differential equations presented in the attachement.