(r2) PNComparison < RmiVirgo

RmiVirgo Web>CBwaves>PNComparison (revision 2) (raw view)~~EditAttach~~

---+ Comparison of CBwaves with NR, hybrid and Columbia waveforms

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---+ RMKI Virgo group (Hungary, Budapest)

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Both CBwaves and the code of the Columbia group developed by Janna Levin use the PN equations to describe the evolution and the emitted waveforms of binary systems. The main differences in the applied approximation can be summarized as:

   * <strong> Equations of motion </strong><br />- PN terms: PN, 2PN, 3PN are identical<br />- Spin terms: SO (PN-SO), SS (PN-SS), RRSO (3.5PN-SO), RRSS (3.5PN-SS) are identical<br /><span style="white-space: pre;"> </span> in the latest verion of CBwaves we have included the 1PN correction to the SO term: PNSO (2PN-SO) which gives non negligible <a target="_blank" href="http://www.grid.kfki.hu/afs/vasuth/web/Janna/PNSO.pdf">contribution</a><br />- Radiation reaction: use of BT (CBwaves) and DD (Columbia) gauges at 2.5PN and 3.5PN
   * <strong>Spin precession</strong><br />In addition to the usual SO and SS terms CBwaves contains the 1PN correction to the SO term in spin precession
   * <strong>Waveform</strong><br />In CBwaves <a target="_blank" href="http://www.grid.kfki.hu/afs/vasuth/web/Janna/wform.pdf">all the contributions</a> from the leading 2.5PN order quadruplole term up to 4.5PN are included.

---++ NR waveforms

The
<table align="center" border="0"> <tbody> <tr> <td><img width="480" alt="" src="http://www.grid.kfki.hu/afs/vasuth/web/Janna/CBwavesNR.jpg" height="360" /><br /></td> <td><img width="480" alt="" src="http://www.grid.kfki.hu/afs/vasuth/web/Janna/JNR1.jpg" height="360" /><br /></td> </tr> <tr> <td> </td> <td><img width="480" alt="" src="http://www.grid.kfki.hu/afs/vasuth/web/Janna/JNR2.jpg" height="360" /><br /></td> </tr> </tbody> </table>

Topic revision: r2 - 2012-11-14 - MatyasVasuth

RmiVirgo

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