[mesa-users] evolving higher mass (e..g. 3Msun) through agb to wd

[Bill Wolf]

Hi Dave,

I've also had good luck for higher-mass stars using the test_suite example. I was running it on an eight-core machine and each run would take ~ ten-twenty minutes to go from ZAMS to WD with the more extreme mass loss prescription used in make_co_wd. Let me know if you're having problems, as I've had to make a lot of WDs of various masses.

Regards

Bill Wolf

On Jan 18, 2013, at 1:50 PM, Jieun Choi <jchoi37 at ucsc.edu> wrote:

> Hi Dave,
> 
> I've found that the following inlist successfully evolves a 2M star well on to the WD cooling sequence in a reasonable amount of time (~1 day).
> 
> Cheers,
> Jieun
> 
> On Fri, Jan 18, 2013 at 10:43 AM, Bill Paxton <paxton at kitp.ucsb.edu> wrote:
> 
> On Jan 18, 2013, at 10:30 AM, Dave Spiegel wrote:
> 
> > I can run a 1-Msun star through the post-MS stages and get a WD at the end within a day or only a little longer.  But, for higher-mass stars (e.g., 3-Msun), MESA cranks away for more than a week, doing hundreds of thermal pulses, and still hasn't gotten to a WD when I'm forced by frustration to hit ctrl-c.  Is there something I could do differently to end up with a WD at the end of a high-mass-star run in a reasonable amount of time?
> 
> 
> 
> Hi Dave,
> 
> The only solution I've found is shown in test_suite/make_co_wd --- get the run_star_extras in addition to the inlist.
> It runs with "okay_to_reduce_gradT_excess" (aka, MLT++), and after the 1st thermal pulse on the agb, it
> turns up the wind to get rid of the envelope.   Seems that just as we need something extra when we go from
> 20 Msun to 30 Msun to get past he burning, we also need help on the agb when we go beyond about 2 Msun.
> 
> Good luck!
> 
> Cheers,
> Bill
> 
> 
> 
> 
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________________________
William Wolf
wmwolf at physics.ucsb.edu

UCSB Department of Physics

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