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<img src='content_image/327985.jpg'>

## IV. THE SPECTRUM OF GRAVITATIONAL WAVES FROM KINKS 

Given the energy-momentum tensor of the source, one can calculate the energy of the GW in the direction of ˆ k with frequency ω as [19] 

<img src='content_image/327982.jpg'>

<img src='content_image/327983.jpg'>

Thus by substituting the energy-momentum tensor (5), we find the energy of the GW after computing integral I ± in Eq. (6). It is given by 

<img src='content_image/327984.jpg'>

