[Mesa-users] compounding offset error with MESA and .gyre output
dennis.stello at sydney.edu.au
Thu Feb 28 02:04:13 EST 2019
Do you restart from the photo or a saved mesa model (.mod file)?
If the former, I have no answer, if the latter, try restart from a photo
DENNIS STELLO | Associate Professor | ARC Future Fellow
School of Physics | Faculty of Science
UNIVERSITY OF NEW SOUTH WALES
Rm136, K15 | University of New South Wales | NSW | 2052
T +61 2 9385 5618 | F +61 2 9385 6060
E d.stello at unsw.edu.au | W http://www.physics.usyd.edu.au/~stello/
On 28/02/2019 17:17, Meridith Joyce via Mesa-users wrote:
> Hi All,
> Bit of an oddly specific question here:
> I'm stopping and starting MESA on very short time intervals (on the
> order of half a year, in some cases) and generating GYRE profiles at
> each of those times.
> Proceeding chronologically, for the first 5 or so such .gyre models
> out of a set of, say, 20, the stellar radius at the appropriate value
> of t in MESA's history file, say R(t), is in near exact agreement with
> the radius passed to the .gyre file.
> With increasing evolutionary time, however, an offset between R(t) in
> the history file and the radius given to .gyre (say R_gyre) emerges.
> The discrepancy between R(t) and R_gyre worsens the more .gyre models
> I try to produce from a single run of ./star.
> All of the .gyre files in a set are generated from a single
> evolutionary run---though that run may proceed discontinuously---using
> the same inlist and controls. I've attached one of my inlists for
> My instinct is that this is due to some quirk or error which
> iteratively compounds a loss of precision or numerical misalignment
> each time I stop and restart the models. The attached figures perhaps
> demonstrate my problem more clearly.
> Has anyone encountered this before or know a way around it?
> Thank you,
> Dr. Meridith Joyce
> PhD, Dartmouth College & SAAO
> RSAA Postdoctoral Fellow
> Australian National University
> mesa-users at lists.mesastar.org
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