[mesa-users] L/L_edd>1?

[Matteo Cantiello]

Hi Tomer,

On May 4, 2014, at 10:43 AM, Tomer Shacham <tomershacham at gmail.com> wrote:

> Hi Matteo,
> Since I disabled convection in the region I am referring to, 

Ok, then I'm not sure what's happening in your specific case (What do you mean you disabled convection?).
I guess you'll have to produce some plots / share your inlist if you want more help at this point.

But going back to your original question,  Lrad>Ledd is possible in stellar interiors in H.E (refs I shared with you in previous emails).

Cheers,

-M


> and I'm getting no gas pressure inversion,
> there must be some other reason.
> Best,
> Tomer
> 
> --
> Tomer Shacham
> 
> 
> Astrophysics Group
> Institute     of     Physics
> The  Hebrew  University
> Jerusalem,   Israel  91904
> 
> 
> 
> On 4 May 2014 20:33, Matteo Cantiello <matteo at kitp.ucsb.edu> wrote:
> Hi Tomer,
> the radiative luminosity can exceed the Eddington luminosity in H.E.
> In that case the 1D solution to the stellar structure requires a gas pressure inversion.
> You are correct that convection sets in when the total luminosity exceeds Ledd. See Fig. 39 in Paxton et al. 2013 and the analytics of Joss et al. 1973
> Cheers,
> 
> -M
> 
> On May 4, 2014, at 10:26 AM, Tomer Shacham <tomershacham at gmail.com> wrote:
> 
>> Hi Matteo,
>> Thanks for your reply.
>> The Radiative luminosity cannot exceed Eddington, at least in the hydrostatic limit. (Inside a star the total luminosity can exceed Eddington only via convection.)
>> Best,
>> Tomer
>> 
>> --
>> Tomer Shacham
>> 
>> 
>> High Energy Physics Group
>> Institute     of     Physics
>> The  Hebrew  University
>> Jerusalem,   Israel  91904
>> 
>> 
>> 
>> On 4 May 2014 19:35, Matteo Cantiello <matteo at kitp.ucsb.edu> wrote:
>> Hi Tomer,
>> I suggest you have a look at Sec. 7 of the second instrument paper (Paxton et al. 2013)
>> where this issue is discussed at length.
>> 
>> Overall, while at the stellar surface the stellar luminosity is limited by the Eddington Luminosity,
>> deeper in the star it can (and it does in massive stars) exceed that limit. 
>> 
>> If in such cases the solution provided by 1D codes using MLT is a good approximation, well that's another story.
>> 
>> -M
>> 
>> 
>> On May 4, 2014, at 6:56 AM, Tomer Shacham <tomershacham at gmail.com> wrote:
>> 
>>> Dear Mesa-users
>>> 
>>> Does anyone have an explanation for how is it possible for the radiative luminosity L_rad to be larger than the Eddington luminosity L_edd?
>>> 
>>> (this happens almost always for high mass stars without using MLT++)
>>> 
>>> Thanks,
>>> Tomer
>>> --
>>> Tomer Shacham
>>> 
>>> 
>>> Astrophysics Group
>>> Institute     of     Physics
>>> The  Hebrew  University
>>> Jerusalem,   Israel  91904
>>> 
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