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El 28/10/13 07:47, Miguel Ángel Aloy Torás escribió:<br>
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Estimados colegas,<br>
<br>
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 <u><font
color="#ff0000">Jueves día 31 de Octubre en el seminario del
DAA</font></u> será:<br>
<br>
11:30 - 12:00: Charla de Michael Gabler<br>
<br>
Título: <b>Neutron star seismology with magnetar oscillations </b><br>
<br>
Abstract:<br>
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. <br>
<br>
12:00 - 12:30: Charla de Bruno Peres<br>
<br>
Título: <b>Towards improving numerical simulations of
core-collapse supernovae </b><br>
<br>
Abstract: <br>
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.<br>
<br>
12:30 - 13:30: Charla Peter Goldreich<br>
<br>
Título: <b>Reading the Record of Ancient Impacts </b><br>
<br>
Abstract:<br>
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.<br>
<br>
Recibid un cordial saludo,<br>
Miguel Ángel Aloy<br>
<br>
<pre class="moz-signature" cols="72">--
__________________________________________________________________________
Prof. Miguel-Angel Aloy Torás
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:e-mail:Miguel.A.Aloy@uv.es">e-mail:Miguel.A.Aloy@uv.es</a>
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
__________________________________________________________________________ </pre>
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<pre class="moz-signature" cols="72">--
__________________________________________________________________________
Prof. Miguel-Angel Aloy Torás
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:e-mail:Miguel.A.Aloy@uv.es">e-mail:Miguel.A.Aloy@uv.es</a>
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
__________________________________________________________________________ </pre>
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