[mesa-users] logQ_limit and the ZAHB

Jeremy Sakstein jeremy.sakstein at port.ac.uk
Wed Aug 24 09:53:10 EDT 2016

Hi All,

Apologies to drag this up a couple of weeks later, I've been off for a
couple of weeks.

I took your advice but the T-rho plot (attached) looks very similar for
both GR and the modified case.

Red is GR and blue is the modified case. I've run from the ZAMS until
either HB_limit = 0.9 (GR) or the code crashes because of the logQ upper

Any suggestions?



On 11 August 2016 at 15:15, Jeremy Sakstein <jeremy.sakstein at port.ac.uk>

> Thanks guys,
> I understand this a bit better now. The HR diagram looked the same but I
> didn't look at the T-Rho box too much so I will do that now and let you
> know what happens.
> I set logQ to max but it still went over it for a small modification.
> Cheers,
> Jeremy
> On 11 August 2016 at 15:08, Josiah Schwab <jwschwab at berkeley.edu> wrote:
>> Hi Jeremy,
>> > I can see how this is set in controls_default but what does this really
>> > mean? I am not sure what logQ is. What is so different from the standard
>> > case that the code needs to stop for this reason?
>> When trying to see the differences between two models, PGSTAR (or other)
>> plotting is key.  As Aaron explained, you have material nearing the edge
>> of the EOS tables.  I would bet that if you look at a plot like
>>   http://mesa.sourceforge.net/pgstar_defaults.html#TRho_Profile_window
>> in the standard and modified cases, you'll see pretty significant
>> differences in the structure.
>> Josiah
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