[mesa-users] Horizontal Branch in 1M_pre_ms_to_wd

[Pavel Denisenkov]

Hi Felix,

only stars with HB masses less than 0.6-0.65 Msun will arrive at the blue
part of the HB.
If you begin with 0.8 Msun, you have to use Reimers mass-loss eta parameter
of 0.5 for the star to loose a sufficient amount of mass on the RGB to
arrive at the blue HB. Stars with a high Z tend to arrive at a redder HB.
Stars with masses in excess of 1 Msun usually end up on the red HB too
because there is too much mass to loose for them to become blue HB stars.

Pavel

On Thu, Dec 3, 2015 at 6:54 AM, Félix Blais <felix.blais.duff at gmail.com>
wrote:

> Hello, I am using the 1M_pre_ms_to_wd/ to check the evolution of stars
> depending on their metallicity (z) and Mass (M), and i wanted to check the
> position of stars on the horizontal branch depending on their metallicity.
> In my simulation, it seems that i can't get to the blue horizontal branch.
> All my models (from 0.8M(solar) and z=0.00 to 1.8M and z=0.04) barely reach
> the red horizontal branch.
>
> Can someone explain to me why i don't have any models reaching the
> horizontal branch to extended temperature?
>
> Is it because it's not massive enough?
>
> Thank you
>
> Félix B.
>
>
>
>
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