Re: PHANTOM
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Daniel Price
Aug 7, 2018, 8:19:03 PM8/7/18
to tru...@ujf.cas.cz, Phantom users, Loren-Aguilar, Pablo, Terrence Tricco
Dear Emil,
We only have Newtonian gravity at the moment, so for neutron stars this would be a poor approximation. For white dwarfs things should work fine.
We have recently put the Helmholtz equation of state into the code, so this should be immediately useable. You might like to get in touch with Pablo Loren and Terry Tricco (cc’d) who’ve been working on simulations of white dwarf mergers.
With a student I am also working on incorporating general equations of state for Neutron stars, such as the Shen equation of state.
Hope that helps!
Daniel
> On 2 Aug 2018, at 9:37 pm, tru...@ujf.cas.cz wrote:
>
> Dear Professor Price,
>
> I am glad to find your seminal work on the Fortran code PHANTOM usable in
> astrophysics. In this context I would like to ask you if it could be used
> for
> calculating the structure of highly magnetized compact objects such as
> neutron stars or white dwarfs. Axisymmetric model would be quite
> sufficent. Besides, how difficult it would be to change the EOS you use
> for another one, e.g. where the pressure, internal energy etc. would be
> obtained from the Helmholtz free energy.
>
> Best regards,
>
> Dr. Emil Truhlik
We only have Newtonian gravity at the moment, so for neutron stars this would be a poor approximation. For white dwarfs things should work fine.
We have recently put the Helmholtz equation of state into the code, so this should be immediately useable. You might like to get in touch with Pablo Loren and Terry Tricco (cc’d) who’ve been working on simulations of white dwarf mergers.
With a student I am also working on incorporating general equations of state for Neutron stars, such as the Shen equation of state.
Hope that helps!
Daniel
> On 2 Aug 2018, at 9:37 pm, tru...@ujf.cas.cz wrote:
>
> Dear Professor Price,
>
> I am glad to find your seminal work on the Fortran code PHANTOM usable in
> astrophysics. In this context I would like to ask you if it could be used
> for
> calculating the structure of highly magnetized compact objects such as
> neutron stars or white dwarfs. Axisymmetric model would be quite
> sufficent. Besides, how difficult it would be to change the EOS you use
> for another one, e.g. where the pressure, internal energy etc. would be
> obtained from the Helmholtz free energy.
>
> Best regards,
>
> Dr. Emil Truhlik
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