[Users] Determination of the final spin of the remnant of a binary neutron star merger

Zach Etienne zachetie at gmail.com
Thu Mar 5 09:35:23 CST 2020


Hi Beyhan,

As there are many subtleties to measuring angular momentum in GR, email is
a very inefficient means to communicate. If you'd like to, I would be
willing to try and address your question over a Google Hangout.

-Zach

*     *     *
Prof. Zachariah Etienne
Physics & Astronomy Dept.
West Virginia University
http://astro.phys.wvu.edu/zetienne/
http://blackholesathome.net
<https://blackholesathome.net>


On Wed, Mar 4, 2020 at 11:22 AM Beyhan Karakaş <beyhannkarakas at gmail.com>
wrote:

> Dear to whom it may concern,
>
>   I am interested in determining the spin of the remnant which are
> resulted from binary neutron star (initially are in irrotational
> configuration) merger . How could the method to determine the final spin
> differ (if it does) in case of remnant is a black hole or a neutron star.
> For the former case, I suppose QuasiLocalMeasures parameter
> "begin_qlm_calculations_after"  along with AHFinderDirect parameter
> "find_after_individual" should be set to the time/iteration that the black
> hole formed. If this is not the case, please clarify how could it be
> determined? In addition, is there a way to find the evolution of the spin
> and orbital eccentricity of the binary?
>
> Best regards,
>
> Beyhan.
> _______________________________________________
> Users mailing list
> Users at einsteintoolkit.org
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>
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