Dear Eloisa and others, What I have is information about the 4d metric along an axis (say the z axis). As far as I recall correctly, this is a Kerr black hole without any scalar field but I may be wrong about that.
Thanks, Maitraya. On Jan 16, 2017 23:30, <users-requ...@einsteintoolkit.org> wrote: > Send Users mailing list submissions to > users@einsteintoolkit.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.einsteintoolkit.org/mailman/listinfo/users > or, via email, send a message with subject or body 'help' to > users-requ...@einsteintoolkit.org > > You can reach the person managing the list at > users-ow...@einsteintoolkit.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Users digest..." > > > Today's Topics: > > 1. No Einstein Toolkit Meeting (Frank Loeffler) > 2. Re: Event horizon finder for 1d data (Ian Hinder) > 3. Re: Event horizon finder for 1d data (Eloisa Bentivegna) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Mon, 16 Jan 2017 07:25:49 -0600 > From: Frank Loeffler <kn...@cct.lsu.edu> > Subject: [Users] No Einstein Toolkit Meeting > To: users@einsteintoolkit.org > Message-ID: <20170116132548.ga3...@topf.wg> > Content-Type: text/plain; charset="utf-8" > > Hi, > > There will *not* be an Einstein Toolkit meeting today. > > The next meeting will be on Mon Jan 23th, 2017, at the usual time: > 9:30am US central time). > > Frank Loeffler > -------------- next part -------------- > A non-text attachment was scrubbed... > Name: not available > Type: application/pgp-signature > Size: 819 bytes > Desc: Digital signature > Url : http://lists.einsteintoolkit.org/pipermail/users/attachments > /20170116/84f18113/attachment-0001.bin > > ------------------------------ > > Message: 2 > Date: Mon, 16 Jan 2017 15:56:00 +0100 > From: Ian Hinder <ian.hin...@aei.mpg.de> > Subject: Re: [Users] Event horizon finder for 1d data > To: Maitraya Bhattacharyya <maitraya.li...@gmail.com> > Cc: Einstein Toolkit Users <users@einsteintoolkit.org> > Message-ID: <b4ef6b25-53ff-40c7-9745-f6513702b...@aei.mpg.de> > Content-Type: text/plain; charset="us-ascii" > > > On 11 Jan 2017, at 19:08, Maitraya Bhattacharyya <maitraya.li...@gmail.com> > wrote: > > > Dear all, > > > > I have some 1d black hole data for which I would like to locate the > event horizon. > > > > However I am new to the Einstein toolkit and therefore need your help in > doing this. > > > > Can you please point out any resources which might help me. > > Hi, > > Locating the event horizon in a generic 3D numerical spacetime is quite > complicated and a lot of work (you need to trace null rays backwards in > time, which means reading the metric from 3D Cactus-format data files). If > the data is 1D, then it is much simpler to use a method adapted to 1D, > which would mean using something other than the Einstein Toolkit. For > example, it may be possible to do this in Mathematica, Matlab, or similar, > or even directly in Python. > > Does someone have a suggestion for where Maitraya could look for numerical > tools for doing this in 1D? > > -- > Ian Hinder > http://members.aei.mpg.de/ianhin > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: http://lists.einsteintoolkit.org/pipermail/users/attachments > /20170116/0fae70b1/attachment-0001.html > > ------------------------------ > > Message: 3 > Date: Mon, 16 Jan 2017 16:19:30 +0100 > From: Eloisa Bentivegna <eloisa.bentive...@ct.infn.it> > Subject: Re: [Users] Event horizon finder for 1d data > To: users@einsteintoolkit.org > Message-ID: <23284f5a-34e3-0d1d-955e-b7ce102cd...@ct.infn.it> > Content-Type: text/plain; charset=windows-1252 > > On 16/01/17 15:56, Ian Hinder wrote: > > > > On 11 Jan 2017, at 19:08, Maitraya Bhattacharyya > > <maitraya.li...@gmail.com <mailto:maitraya.li...@gmail.com>> wrote: > > > >> Dear all, > >> > >> I have some 1d black hole data for which I would like to locate the > >> event horizon. > >> > >> However I am new to the Einstein toolkit and therefore need your help > >> in doing this. > >> > >> Can you please point out any resources which might help me. > > > > Hi, > > > > Locating the event horizon in a generic 3D numerical spacetime is quite > > complicated and a lot of work (you need to trace null rays backwards in > > time, which means reading the metric from 3D Cactus-format data files). > > If the data is 1D, then it is much simpler to use a method adapted to > > 1D, which would mean using something other than the Einstein Toolkit. > > For example, it may be possible to do this in Mathematica, Matlab, or > > similar, or even directly in Python. > > > > Does someone have a suggestion for where Maitraya could look for > > numerical tools for doing this in 1D? > > Hi! > > I wonder if there is a much simpler solution in this case than tracing > geodesics. > > Maitraya, is your "1d black hole" a vacuum, spherically symmetric > spacetime in standard GR? Is it expressed in a static foliation (does > the metric depend on time)? > > Best, > Eloisa > > > ------------------------------ > > _______________________________________________ > Users mailing list > Users@einsteintoolkit.org > http://lists.einsteintoolkit > <http://lists.einsteintoolkit.org/mailman/listinfo/users> > *The actor faced outrage over social media when he got married to Kareena > in 2012. Four years later, he got trolled again for naming his son. > However, Saif has no hard feelings for people who ranted against him. * > .org/mailman/listinfo/users > <http://lists.einsteintoolkit.org/mailman/listinfo/users> > > > End of Users Digest, Vol 82, Issue 6 > ************************************ >
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