Transparencias del grupo del IAA (GRanada) - IFIC

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Dec 12, 2013 (3 years and 7 months ago)

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Motivación de un entorno GRID en el
área de Astrofísica (
ideas
)


Resolución de problemas numéricos complejos en el ámbito de la
Astrofísica:


Modelos de interacción y evolución galáctica

(
sistemas de N cuerpos
)
.


Modelos Cosmológicos (
Cosmología Numérica)


Modelos Magnetohidrodinámicos,

emisión radiativa,
etc.


Reducción, calibración y análisis masivo de datos astrofísicos “pesados”:

Creación y desarrollo de aplicaciones GRID para el tratamiento completo de datos
astrofísicos
(data mining)
.


GRID+Global Virtual Observatory:

Desarrollo de un tejido GRID para
almacenamiento, distribución y acceso a los archivos de información astronómica
heterogénea (
AstroGrid, EGSO)



Creación de una red de telescopios e instrumental “inteligente”
distribuidos geográficamente y controlados de manera remota
.
(iAstro,
eStar)


Astrophysical projects with interest in GRID


Multiwavelength observational study and modelization of
compact groups of galaxies



Goal:
Discriminate between the genetic characteristic of a galaxy and those
produced by the neighborhood.


The project studies the
Compact Groups of Galaxies
, where the
interactions between galaxies are especially intense, refering to:


the analysis of their interestellar medium.


the modelization of their present dynamical status:


With a good coverage of the phase space in the models (high number of particles,
realistic conditions, etc.) and initial conditions delimited by observational study.


It’s necesary a
big
network of interconnected computers at very high speed,
working as a parallel intensive calculation tool for the simulations and the
reduction of large volumes of data
.



Astrophysical projects with interest in GRID


Radiointerferometry applied to the study of Active Galactic
Nuclei



Goal:
Study of the parsec
-
scale radio jets of Active Galactic Nuclei

(AGN)
,
making use of the Very Long Baseline Interferometry (VLBI).




The project permit to obtain statistical conclusions about the physics of AGN,
combining:


Multi
-
epoch multy
-
frequency VLBI observations.


Numerical magnetohydrodynamical relativistics jets models which will
characterize the espectral radioemision
.


Actually, t
he numerical codes runs in 24 IBM p32
-
way "Regatta" compute
nodes, equipped with 1.3 GHz Power 4 processors, with a peak perf. of
166 GFlop/s and 64 GB of main memory per node.


Astrophysical projects with interest in GRID


Remote sensing of atmospheric temperature and composition
with Envisat



Goal:

Improve significantly the knowledge of the temperature and
composition in the stratosphere by analyzing the measurements to be obtain
with instruments
MIPAS

(ESA satellite Envisat) and
SABER

(NASA mission
Timed).



The project will analy
s
e atmospheric pressure/temperature and minor
constituents abundances, including non
-
LTE processes.




The hardware requirements in order to apply Non
-
LTE inversion technique to
work with the high spectral resolution MIPAS measurements are 16
processors and 16
Gbyte
shared RAM (min).




Astrophysical projects with interest in GRID


Spanish participation in the mission COROT
(Convection, Rotation
and planetary Transits)


Goal:

COROT

is a space telescope dedicated to estelar photometry with
extremely high precision. The mission has two main objectives:


Asteroseismology:

COROT
will perform observations of large durations
on stars to characterize their oscillations,with continuous observations
lasting 5 months,with a precision in the order of one part in 1000000.


Detection of extrasolar planets:
As COROT aims both a high precision
and a long observation time, the search for terrestrial exoplanets by the
transit method can easily be integrated in the payload and in the mission
profile.



The mission will generate a

large amount of data. The analy
sis

will need a


lot of CPU time in order to find oscillation modes and variations in the
brightness of the star between 0.01% and 1%.



Astrophysical projects with interest in GRID


Statistical study of the Interestellar Medium (
ISM
) and Star
Formation of a complete sample of 760 isolated galaxies



Goal:
Quantify the ISM properties of a
well defined and statistically
significant sample of isolated galaxies

in order to characterize a
reference sample with minimum influence from the environment.




The sample will have a complete multiwavelength information concerning the
ISM, and it will be of special interest to analyse the large amount of data will
be generated for high z galaxies
.



The data will become public by means of a database. It’ll be integrated in a
future
Virtual Global Observatory
.