[Okc-wp4] Reminder: EO meeting (7 May 2015)

[Francesco Taddia]

today!!
-------------------------------------------
Francesco Taddia
Postdoctoral Researcher
Department of Astronomy
Stockholm University, Sweden
ftadd at astro.su.se <mailto:ftadd at astro.su.se>







> On 05 May 2015, at 11:13, Francesco Taddia <ftadd at astro.su.se> wrote:
> 
> Dear all,
> 
>  this Thursday (13:00-14:00, KTH meeting room on the 5th floor) we will have Nir Sapir talling about
> supernova shock breakout at our EO meeting, here the abstract:
> 
> %%%%%%%%%
> 
> Abstract:
> Supernovae are classified into different types according to the characteristics of the observed light curve and
> spectra. However, the connection between specific progenitors and some supernovae types is still an open issue.
> The early light curve, when the shock produced by the explosion breaks out of the star, has been suggested to give
> information regarding stellar parameters such as the progenitor's radius. The problem of a non-relativistic
> radiation mediated shock breaking out from a stellar envelope will be discussed, and detailed spectral
> calculations will be presented. Unlike previous studies, the effect of Compton scattering on the radiation
> spectrum is included here in the radiation-hydrodynamics calculations, in the form of the Kompaneets equation.
> These calculations confirm previously assumed Compton equilibrium between matter and radiation, and show again
> that there is a signature spectral shape for the emission following shock breakout. This allows the inference of
> both the progenitor's radius and the shock velocity from the fluence spectrum and the total emitted energy.
> Problems that remain with the shock breakout model regarding the incompatibility with observed X-ray flashes and
> missing X-ray flashes will also be discussed.
> 
> %%%%%%%%%
> 
> cheers
> 
> /Francesco
> -------------------------------------------
> Francesco Taddia
> Postdoctoral Researcher
> Department of Astronomy
> Stockholm University, Sweden
> ftadd at astro.su.se <mailto:ftadd at astro.su.se>
> 
> 
> 
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> 

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