[mesa-users] L/L_edd>1?

[Matteo Cantiello]

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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