[SEMINARI] Recordatori: Miniworkshop Jueves 31

[Enric Marco]

El 28/10/13 07:47, Miguel Ángel Aloy Torás escribió:
> Estimados colegas,
>
> Con motivo de la visita del Prof. Peter Goldreich (Caltech /IAS, 
> Princeton), en colaboración con el IFIC, hemos decidido organizar un 
> "miniworkshop" uniendo un total de tres charlas, una de las cuales 
> será impartida por Bruno Peres, quien se ha incorporado esta semana 
> pasada a mi grupo como postdoc (PID junior). El calendario de eventos 
> previstos para el _Jueves día 31 de Octubre en el seminario del DAA_ será:
>
> 11:30 - 12:00:  Charla de Michael Gabler
>
> Título: *Neutron star seismology with magnetar oscillations *
>
> Abstract:
> Neutron stars are unique astrophysical laboratories that allow to 
> study the behavior of matter at supranuclear densities. The analysis 
> of their oscillation spectra is one possibility to gain information on 
> their interior. We study the magneto-elastic oscillations of highly 
> magnetized neutron stars (magnetars) which are believed to be the 
> origin of quasi-periodic oscillations observed in giant flares of soft 
> gamma-ray repeaters. Our simulations covering the origin of the 
> oscillations in the stellar interior and a possible modulation 
> mechanism in the exterior suggest the presence of superfluid species 
> in the core of the magnetar. The star is simulated with a GRMHD code 
> which we extended by description of the solid crust and superfluid 
> effects in the core. For the exterior emission mechanism we built a 
> new Monte-Carlo Code to describe resonant cyclotron scattering which 
> is coupled to a Particle-in-Line Code that calculates the consistent 
> momentum distribution of the charge carriers in the magnetosphere.
>
> 12:00 - 12:30: Charla de Bruno Peres
>
> Título: *Towards improving numerical simulations of core-collapse 
> supernovae *
>
> Abstract:
> Two different paths that represent an improvement in the numerical 
> simulations of core-collapse supernovae will be explored. The first 
> one consists on taking into account the presence of hyperons in the 
> hot and dense matter. To test this, I run simulations up to black hole 
> formation. Results including phase transition to hyperonic matter and 
> gravitational waves extraction will be shown. The second proposed path 
> is to treat the general relativistic Boltzmann equation, unavoidable 
> for an accurate treatment of the neutrinos, with spectral methods, in 
> an attempt to be less demanding in computational power than usual 
> finite differences codes. Test cases will be shown.
>
> 12:30 - 13:30: Charla Peter Goldreich
>
> Título: *Reading the Record of Ancient Impacts *
>
> Abstract:
> Debris from asteroids and comets continually bombards the Earth. Large 
> impacts launch ejecta on trajectories that transport it thousands of 
> kilometers from the impact site. These events are recorded in discrete 
> layers of sub-millimeter size spherules in sea floor sediments. 
> Larger, rarer, and interestingly shaped objects are found on land. I 
> will describe the physical processes that occur in energetic impacts. 
> Emphasis will be given to the mechanisms that determine the sizes and 
> shapes of the ejecta and the cooling of the fireball.  Analogies with 
> structure formation in an expanding universe following a hot big bang 
> will be exploited.
>
> Recibid un cordial saludo,
> Miguel Ángel Aloy
>
> -- 
> __________________________________________________________________________
> Prof. Miguel-Angel Aloy Torás
>
> e-mail:Miguel.A.Aloy en uv.es
> Departamento de Astronomía y Astrofísica
> Universidad de Valencia              phone :   +34 96 354 3080
> Edificio de Investigación            FAX:      +34 96 354 3084
> C/ Dr. Moliner s/n
> 46100-Burjassot (Valencia), SPAIN
> __________________________________________________________________________


-- 
__________________________________________________________________________
Prof. Miguel-Angel Aloy Torás

e-mail:Miguel.A.Aloy en uv.es
Departamento de Astronomía y Astrofísica
Universidad de Valencia              phone :   +34 96 354 3080
Edificio de Investigación            FAX:      +34 96 354 3084
C/ Dr. Moliner s/n
46100-Burjassot (Valencia), SPAIN
__________________________________________________________________________



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