Motivaci

1
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).
• GRIDGlobal 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)

2
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.
• Its 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.

3
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, the 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.

4
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 analyse 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).

5
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 analysis 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.

6
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. Itll be integrated in a future Virtual
  Global Observatory.